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- Recommendation I.251 - Number identification supplementary services
-
-
-
- The purpose of this Recommendation is to provide the stage 1 description of the method defined in Recommen-
- dation I.130 using the means given in Recommendation I.210.
-
-
-
- Supplementary services are described by a prose definition and description (step 1.1) and by a dynamic
- description (step 1.3). The application of the attribute technique, as defined in RecommendationI.140, for sup-
- plementary services is for further study.
-
-
-
- This Recommendation describes the following Number Identification Supplementary Services:
-
-
-
- I.251.1 - Direct Dialling In (DDI)
-
-
-
- I.251.2 - Multiple Subscriber Number (MSN)
-
-
-
- I.251.3 - Calling Line Identification Presentation (CLIP)
-
-
-
- I.251.4 - Calling Line Identification Restriction (CLIR)
-
-
-
- I.251.5 - Connected Line Identification Presentation (COLP)
-
-
-
- I.251.6 - Connected Line Identification Restriction (COLR)
-
-
-
- I.251.7 - Malicious Call Identification (MCI) (Note1)
-
-
-
- I.251.8 - Sub-addressing (SUB) (Note 1)
-
-
-
- Note 1 - These services being identified need to be further studied and the descriptions are not yet included.
-
-
-
- I.251.1 Direct Dialling In
-
-
-
- 1. Definition
-
-
-
- Direct Dialling In (DDI) enables a user to directly call another user on a ISPBX or other private system without
- attendant intervention.
-
-
-
- 2. Description
-
-
-
- 2.1 General description
-
-
-
- A part of the ISDN number, which is significant to the called user, is passed to that user during call establishment. This
- supplementary service is based on the use of the ISDN number and does not include sub-addressing.
-
-
-
- Note 1 - A similar method to select a terminal on a passive bus is described in the supplementary service MSN.
-
-
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- Note 2 - The caller may or may not find the ISDN number in the public directory.
-
-
-
- 2.2 Specific terminology
-
-
-
- None.
-
-
-
- 2.3 Qualifications on the applicability to telecommunications services
-
-
-
- No restrictions.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- This service shall be provided/withdrawn after pre-arrangement with the service provider. The service provider shall
- allocate a set of ISDN numbers.
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- Activation through subscription.
-
-
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- 3.2.2 Invocation and operation
-
-
-
- Call initiation procedures are the same as for the basic service. The calling and called users perceive the same com-
- pletion procedures as for the basic service, without attendant intervention. Upon answer, the calling user is connected to
- the called user designated by the ISDN number.
-
-
-
- Note - When the connection from the caller to the ISPBX is established, the called ISPBX might use the connection for call
- progress signalling transmission.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- Not applicable.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- If the called user is busy or does not answer, the procedures for basic calls will apply.
-
-
-
- If a call is made by sending incomplete address information, the call will be released by time supervision within the
- public exchange. A corresponding time supervision within the ISPBX may also be convenient.
-
-
-
- 3.4 Alternate procedures
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- Not identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- Not identified.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service. For example, supplemen-
- tary service provision may be part of the general subscription charges. Charges may include a subscription fee and a
- rental charge proportional to the quantity of numbers assigned.
-
-
-
- 5. Interworking requirements
-
-
-
- No problems identified.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.2 Call Transfer
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.3 Connected Line Identification Presentation
-
-
-
- For further study.
-
-
-
- 6.4 Connected Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.5 Calling Line Identification Presentation
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.6 Calling Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.7 Closed User Group
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.8 Conference Calling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.9 Direct Dialling In
-
-
-
- Not applicable.
-
-
-
- 6.10 Diversion services
-
-
-
- 6.10.1 Call Forwarding Busy
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10.2 Call Forwarding No Reply
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10.3 Call Forwarding Unconditional
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.11 Line Hunting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.12 Three-Party Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
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- 6.13 User-to-User Signalling
-
-
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
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- 6.14 Multiple Subscriber Number
-
-
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
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- 6.15 Call Hold Service
-
-
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
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- 6.16 Advice of Charge
-
-
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 7. Dynamic description
-
-
-
- The dynamic description is as for basic services.
-
-
-
- I.251.2 Multiple Subscriber Number
-
-
-
- 1. Definition
-
-
-
- Multiple Subscriber Number (MSN) provides the possibility for assigning multiple ISDN numbers to a single interface.
- This allows e.g.
-
-
-
- 1) to dial from a line connected to a public network directly to terminals connected to a basic access which has
- subscribed to MSN (e.g. in a passive bus configuration);
-
- 2) the network to determine which ISDN number is applicable on originating calls, e.g. for charging purposes, for
- notification to the called party and application for supplementary services.
-
-
-
- It is considered:
-
-
-
- - that some administrations may not have knowledge or control over what is connected to the basic access, e.g.
- an NT2 or passive bus;
-
-
-
- - that administrations have differing numbering methods;
-
-
-
- - that common international terminal specifications are desired.
-
-
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- 2. Description
-
-
-
- 2.1 General description
-
-
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- The addressing of terminals on a basic access may be achieved by applying a set of ISDN numbers to the single basic
- access. When a call with one of these ISDN numbers is delivered, the called number is indicated to the MSN user, either
- directly or through a mapping by the network.
-
-
-
- In general, any set of numbers may be sent from the network to the subscriber's equipment during call establishment.
- However, it is recognized that administrative practices and certain equipment designs may lead to the adoption of
- restricted numbering sequences, e.g. by relating the last digit(s) of a fixed length ISDN number to the terminals to be
- connected. The actual method of relating the ISDN number to a particular terminal is a matter of national implementation
- but may, for example, be done by central intelligence or by distributed intelligence within the terminals.
-
-
-
- The essential difference between this supplementary service and DDI concerns the length of the number sent to and
- processed by the user's installation. In the DDI situation the user (ISPBX) will be tailored on a per installation basis to
- receive the particular number of digits necessary to identify the terminals of this user (ISPBX).
-
-
-
- With the multiple subscriber number supplementary service however, the service provider will fix the length of the num-
- ber to be transmitted to the user's installation. It may comprise 1 or 2 or 3 of the last digits up to the full ISDN number.
- This number will be sent to the user network interface.
-
-
-
- The digit(s) significant for terminal differentiation is/are an integral part of the ISDN numbering scheme.
-
-
-
- Note - MSN is independent from and does not impose any constraints on "service indication" and "sub-addressing".
-
-
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- 2.2 Specific terminology
-
-
-
- None.
-
-
-
- 2.3 Qualifications on the applicability to telecommunications services
-
-
-
- No restrictions.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- The service shall be provided after pre-arrangement with the service provider.
-
-
-
- The service provider shall allocate a set of ISDN numbers (not necessarily consecutive). At the option of the service
- provider, one of these numbers may be designated by the MSN subscriber as the default number for the interface. At the
- option of the service provider, the user may specify a mapping arrangement between ISDN number and MSN digit(s).
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- Activation through subscription.
-
-
-
- 3.2.2 Invocation and operation
-
-
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- The destination number sent by the calling user will be analyzed in the network. If the called user subscribes to this
- supplementary service, the network sends the available part of the ISDN number or at least the relating digit(s)
-
-
-
- i) identical to that last digit(s) of the ISDN number; or
-
-
-
- ii) generated by the network on the basis of a mapping process between ISDN number(s) and MSN digit(s).
-
-
-
- Terminals compatible to the MSN service will react on a call as follows:
-
-
-
- - if MSN digit(s) equal to their own preadjusted identity is (are) presented, they react to it in a predetermined
- way;
-
-
-
- - if there is a setup message without MSN digit(s), the terminal will interpret it as a normal call. (This may hap-
- pen if a terminal with MSN capabilities is used on an interface, where MSN is not subscribed for.)
-
-
-
- Terminals not compatible to the MSN service will react on a call as follows:
-
-
-
- - either if there is (are) MSN digit(s) or not, the call will be interpreted as a normal call.
-
-
-
- On outgoing calls a terminal compatible with the MSN service may provide the ISDN number (or MSN digits) when plac-
- ing the call. The network will carry this identity unchanged or will replace the digit(s) by the associated ISDN number. The
- ISDN number of the calling terminal will then be sent to the called user with the incoming call (refer to CLIP supplementary
- service).
-
-
-
- It is possible to allocate one ISDN number to one or more terminals. Similarly, one terminal may allow the assignment
- of one or more than one number. Further, as an administrative option a specific digit or sequence of digits may be allo-
- cated to enable all terminals in a point-to-multipoint configuration to react in the same way as if the supplementary ser-
- vice MSN would not be subscribed to.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- Not applicable.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- An ISDN number or MSN digits, generated by a terminal at an interface where MSN is in operation shall be discarded
- by the network unless this number is subscribed to by this interface. A default number may be provided by the network.
-
-
-
- 3.4 Alternative procedures
-
-
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- None identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- None identified.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service.
-
-
-
- 5. Interworking requirements
-
-
-
- None identified.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- In case of interaction with other supplementary services, these services could be applicable to the individual MSN rather
- than to the subscriber access.
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.2 Call Transfer
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.3 Connected Line Identification Presentation
-
-
-
- See COLP (I.251.5) interaction with MSN.
-
-
-
- 6.4 Connected Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.5 Calling Line Identification Presentation
-
-
-
- Upon call initiation, if the ISDN number indicated by the MSN user terminal is not subscribed to for the interface, or if
- no numbering information is indicated, a default number (if designated by the MSN subscriber) or a number unavailable
- indication is provided to the CLIP user.
-
-
-
- 6.6 Calling Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.7 Closed User Group
-
-
-
- For further study.
-
-
-
- 6.8 Conference Calling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.9 Direct Dialling In
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10 Diversion services
-
-
-
- 6.10.1 Call Forwarding Busy
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10.2 Call Forwarding No Reply
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10.3 Call Forwarding Unconditional
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.11 Line Hunting
-
-
-
- For further study.
-
-
-
- 6.12 Three-Party Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.13 User-to-User Signalling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.14 Multiple Subscriber Number
-
-
-
- Not applicable.
-
-
-
- 6.15 Call Hold Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.16 Advice of Charge
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 7. Dynamic description
-
-
-
- The dynamic description is as for the basic services.
-
- I.251.3 Calling Line Identification Presentation
-
-
-
- 1. Definition
-
-
-
- Calling Line Identification Presentation (CLIP) is a supplementary service offered to the called party which provides the
- calling party's ISDN- number, possibly with sub-address information, to the called party.
-
-
-
- 2. Description
-
-
-
- 2.1 General description
-
-
-
- When CLIP is applicable and activated, the network provides the calledparty with the number of the calling party at call
- set-up on all incoming calls.
-
-
-
- The calling party number may be accompanied by a sub-address.
-
-
-
- The network should be capable of transmitting at least 15 digits (maximum length of an ISDN number). In addition, if
- provided by the calling party, the network should be capable of transmitting a sub-address.
-
-
-
- The network to which the calling party belongs should attempt to ensure that enough digits are transmitted to enable
- the called party to return the call, based on the calling number presented.
-
-
-
- 2.2 Specific terminology
-
-
-
- None identified.
-
-
-
- 2.3 Qualifications on the applicability to telecommunication services
-
-
-
- This supplementary service is applicable to all telecommunication services.
-
- It is to be noted that in the Telematic services an exchange of Terminal Identification (TID) occurs at a higher layer
- subsequent to a successful call establishment.
-
-
-
- For Telematic services this supplementary service shall consist only of the access number of the calling party and this
- shall be provided by the network. For other non-voice services this supplementary service is for further study. The presen-
- tation of the calling party's ISDN-number by Telematic terminals and by other non-voice terminals is for further study.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- CLIP may be provided on a subscription basis or be generally available. CLIP may be withdrawn at the request of the
- subscriber or by the network provider for administration reasons.
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- CLIP is activated on provision and deactivated on withdrawal. No information needs to be registered with the network
- for this supplementary service.
-
-
-
- 3.2.2 Invocation and operation
-
-
-
- The number presented shall unambiguously identify the access of the calling party. The number presented is either:
-
-
-
- i) completely provided by the network;
-
-
-
- ii) completely provided by the calling party; or
-
-
-
- iii) partially provided by the network with the rest provided by the calling party, e.g., the access number is provided
- by the network and the additional digits to make the number complete by the calling party.
-
-
-
- Where either the complete calling number, or part of the calling number is initially provided by the calling party, the
- network shall check its validity. If this check is successful, then this number is used by the network. For complete calling
- numbers, this validity check shall determine whether the number is allocated to the access; for partially provided numbers
- this check shall for example, determine whether the digits are within the allocated range.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- None identified.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- If the network check on a calling party provided number is unsuccessful, the network will use the default number as the
- number of the calling party.
-
-
-
- There are two exceptions when the calling party number is not presented to the called party:
-
-
-
- i) when the calling party has an arrangement (see definition of Calling Line Identification Restriction) that presen-
- tation of his number is not allowed; and
-
-
-
- ii) when the calling party number is not available, e.g., due to interworking with the analogue telephone network
- (PSTN).
-
-
-
- In such cases no number is presented to the called party, but he shall receive an indication that the number of the
- calling party is unavailable.
-
-
-
- 3.4 Alternative procedures
-
-
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- None identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- In some cases where a calling party has an arrangement that presentation of his number is not allowed, there may be
- certain categories of called party that have the ability to override this restriction and have the calling number presented.
- This function is a national option.
-
-
-
- Problems may occur when the calling party does not belong to the same network as the called party and in the calling
- party's network the override category does not exist, but in the called party's network this category does exist. A problem
- occurs when a calling party who restricts presentation and assumes that his number is never presented, makes a call to a
- called party who has the override category.
-
-
-
- The cases where the override category is applied is a national matter. Depending on bilateral agreement about the
- application of the override category in country B, and the presentation not allowed arrangement of the calling party in
- country A, country A may or may not deliver the calling line identification to country B. Agreements are also needed with
- any transit network.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service.
-
-
-
- 5. Interworking requirements
-
-
-
- On calls incoming from some non-ISDN networks, the calling number may be delivered to the destination ISDN without
- the ability to indicate whether presentation is allowed or not. How the ISDN should behave in this case is for further study.
-
-
-
- From some other non-ISDN networks, no calling party number may be available to the ISDN and therefore the full
- number of the calling party cannot be given to the called party who has been provided with CLIP. In this situation a partial
- number, or a number unavailable indication, is given to the called party.
-
-
-
- As a national option, the originating network shall have the possibility to restrict any information identifying the calling
- party from being forwarded to another network. If a destination network receives a calling party ISDN number without any
- indication of presentation allowed or restricted, the destination network (host network) will act according to its own rules
- and regulations.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- If an ISDN User(s) who has subscribed to the Call Waiting service at his B access, has been given a call waiting indi-
- cation and has subscribed to the CLIP service, then the calling party's number shall be presented to the ISDN User(s) at B
- at the time the call waiting indication is given. The presentation of the CLIP information shall be the same as when the
- ISDN User(s) at B receives a normal call.
-
-
-
- 6.2 Call Transfer
-
-
-
- See text in _6.5, CLIP, in the Call Transfer supplementary service definition.
-
-
-
- 6.3 Connected Line Identification Presentation
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.4 Connected Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.5 Calling Line Identification Presentation
-
-
-
- Not relevant.
-
-
-
- 6.6 Calling Line Identification Restriction
-
-
-
- The calling line identification will not be presented if the calling user has an arrangement to inhibit the presentation of
- his number to the called party. The only occasion when a user subscribing to CLIP can take precedence over CLIR is when
- the user has an override category. This is a national option.
-
-
-
- 6.7 Closed User Group
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.8 Conference Calling
-
-
-
- Any party that has subscribed to CLIP will receive the number of a calling conference controller when:
-
-
-
- - the party is to be included as a "New Party" during the invocation of a conference call; or
-
-
-
- - the party is being added to an existing conference call.
-
-
-
- 6.9 Direct Dialling In
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10 Diversion services
-
-
-
- If an incoming call to the party to which CLIP has been provided has already been forwarded, then the calling party's
- number should be the number of the original calling party.
-
-
-
- 6.10.1 Call Forwarding Busy
-
-
-
- See text in Call Forwarding Busy for further information.
-
-
-
- 6.10.2 Call Forwarding No Reply
-
-
-
- See text in Call Forwarding No Reply for further information.
-
-
-
- 6.10.3 Call Forwarding Unconditional
-
-
-
- See text in Call Forwarding Unconditional for further information.
-
-
-
- 6.11 Line Hunting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- The Line Hunting service occurs before CLIP. The Line Hunting service would first provide a selection of an interface for
- presentation of a call. Once the service selects an interface, normal call processing would occur including the presentation
- of the calling party's number to a selected interface who has subscribed to CLIP.
-
-
-
- 6.12 Three-Party Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.13 User-to-User Signalling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.14 Multiple Subscriber Number
-
-
-
- See text in Multiple Subscriber Number definition.
-
-
-
- 6.15 Call Hold Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.16 Advice of Charge
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 7. Dynamic description
-
-
-
- The dynamic description for this service is shown in Figure1/I.251.3.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- I.251.4 Calling Line Identification Restriction
-
-
-
- 1. Definition
-
-
-
- Calling Line Identification Restriction (CLIR) is a supplementary service offered to the calling party to restrict presenta-
- tion of the calling party's ISDN-number and Sub-Address to the called party.
-
-
-
- 2. Description
-
-
-
- 2.1 General description
-
-
-
- When CLIR is applicable and activated the originating node provides the destination node with a notification that the
- calling party's ISDN number and any Sub-Address information, is not allowed to be presented to the called party. In this
- case no calling party number is included in the call offering to the called party's installation.
-
-
-
- Note - When CLIR is subscribed to, some Network Providers may not wish to send the originating identity of the calling
- customer to other Network Providers.
-
-
-
- 2.2 Specific terminology
-
-
-
- None identified.
-
-
-
- 2.3 Qualifications on the applicability to telecommunications services
-
-
-
- None identified, i.e., this supplementary service is applicable to all telecommunication services.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- CLIR can be provided on a subscription basis or be generally available.
-
-
-
- As a network provider option, CLIR can be offered with several subscription options. The options apply separately to
- each ISDN number. Subscription options are summarized below:
-
-
-
- Subscription Option Values
-
-
-
- CLIR mode - permanent (active for all calls)
-
- - temporary (specified by user per call)
-
- Default (only for temporary mode) - presentation restricted
-
- - presentation not restricted
-
-
-
-
-
- It is a network provider option to specify either or both of the above options for all subscribers, for instance, in an
- exchange or network.
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- If subscribed to in the permanent mode, CLIR is always activated. If subscribed to on a temporary basis, CLIR is acti-
- vated upon explicit request for the service, or on default, on a particular call and is deactivated after that call.
-
-
-
- 3.2.2 Invocation and operation
-
-
-
- If the called party subscribes to Calling Line Identification Presentation and the calling party has CLIR activated, the
- called party shall receive an indication that the calling party number is not available.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- No exceptional procedures identified.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- No exceptional procedures identified.
-
-
-
- 3.4 Alternative procedures
-
-
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- No alternative procedures identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- Certain countries may define categories of subscribers that have the ability to override the presentation restriction and
- have the calling party's ISDNnumber and any Sub-Address presented (e.g., the police).
-
-
-
- The ability to have such override category is a national option.
-
-
-
- When a call originates in one ISDN and terminates in another ISDN and CLIR is applied, the rules and regulations of the
- destination network (the host network) should apply. For example, if override category is not applicable in the originating
- network but in the destination network a call with CLIR applied can still be overridden in the destination network, whenever
- information on the calling line is available for this network.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service.
-
-
-
- 5. Interworking requirements
-
-
-
- On calls to or via non-ISDNs, it cannot be assured that a CLIR indication can be carried to the destination network. As
- a national option the originating network shall have the possibility to restrict any information identifying the calling party
- from being forwarded to the destination network when CLIR is applicable. If a network receives a calling party ISDN number
- without any indication of presentation allowed or restricted, the destination network (the host network) will act according to
- its rules and regulations.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- Assume that a call from a User at C, who has subscribed to the CLIR service, invokes Call Waiting at a User(s) at B.
- The User(s) at B would receive a call waiting indication but would not receive the calling User at C's number when the call
- waiting indication is given.
-
-
-
- 6.2 Call Transfer
-
-
-
- Assume that a User A has an established call with User B and wishes to transfer this call with User B to User C. If User
- A has subscribed to CLIR, then User C shall not receive a calling number when User A invokes any call transfer procedure.
- If User B has subscribed to CLIR, then User C shall not receive a calling number during the transfer of User B to User C.
-
-
-
- 6.3 Connected Line Identification Presentation
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.4 Connected Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.5 Calling Line Identification Presentation
-
-
-
- CLIR will take precedence over Calling Line Identification Presentation (CLIP).
-
-
-
- The only occasion when a user subscribing to CLIP can take precedence over CLIR is when the user has an override
- category. This is a national option.
-
-
-
- 6.6 Calling Line Identification Restriction
-
-
-
- Not relevant.
-
-
-
- 6.7 Closed User Group
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.8 Conference Call
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.9 Direct Dialling In
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.10 Diversion services
-
-
-
- 6.10.1 Call Forwarding Busy
-
-
-
- When CLIR is applicable and activated, the calling party's ISDN-number will not be presented to the "forwarded-to"
- user unless this user has an override category. The latter is a national option.
-
-
-
- 6.10.2 Call Forwarding No Reply
-
-
-
- When CLIR is applicable and activated, the calling party's ISDN-number will not be presented to the "forwarded-to"
- user unless this user has an override category. The latter is a national option.
-
-
-
- 6.10.3 Call Forwarding Unconditional
-
-
-
- When CLIR is applicable and activated, the calling party's ISDN-number will not be presented to the "forwarded-to"
- user unless this user has an override category. The latter is a national option.
-
-
-
- 6.11 Line Hunting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.12 Three-Party Service
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
- 6.13 User-to-User Signalling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.14 Multiple Subscriber Number
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.15 Call Hold Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.16 Advice of Charge
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 7. Dynamic description
-
-
-
- The dynamic description for this service is shown in Figure1/I.251.4.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- I.251.5 Connected Line Identification Presentation
-
-
-
- 1. Definition
-
-
-
- Connected Line Identification Presentation (COLP) is a supplementary service offered to the calling party which provides
- the connected party's ISDN- number to the calling party.
-
-
-
- 2. Description
-
-
-
- 2.1 General description
-
-
-
- When COLP is applicable and activated, the network provides the calling party with the number of the connected party
- when the connected party answers the incoming call. The network should be capable of transmitting at least 15 digits
- (maximum length of an ISDN number).
-
-
-
- Note - The possibility of enhancing this service to provide the called party number before the called party answers the call
- is for further study.
-
-
-
- 2.2 Specific terminology
-
-
-
- None identified.
-
-
-
- 2.3 Qualifications on the applicability to telecommunication services
-
-
-
- This supplementary service is applicable to all telecommunication services.
-
-
-
- It is to be noted that in the Telematic services an exchange of Terminal Identification (TID) occurs at a higher layer
- subsequent to a successful call establishment.
-
-
-
- For Telematic services this supplementary service shall consist only of the access number of the connected party and
- this shall be provided by the network. For other non-voice services this supplementary service is for further study. The
- presentation of the connected party's ISDN number by Telematic terminals and by other non-voice terminals is for further
- study.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- The COLP supplementary service may be provided on a subscription basis or be generally available.
-
-
-
- COLP may be withdrawn at the request of the subscriber or by the network provider for administration reasons.
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- COLP is activated on provision and deactivated on withdrawal.
-
-
-
- No information needs to be registered with the network for this supplementary service.
-
-
-
- 3.2.2 Invocation and operation
-
-
-
- The number presented shall unambiguously identify the access of the connected party. The number presented is either:
-
-
-
- i) completely provided by the network;
-
-
-
- ii) completely provided by the connected party; or
-
-
-
- iii) partially provided by the network with the rest provided by the connected party, e.g., the access number is
- provided by the network and the additional digits to make the number complete by the connected party.
-
-
-
- Where either the complete connected number, or part of the connected number is initially provided by the connected
- party the network shall check its validity. If this check is successful then this number is used by the network.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- None identified.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- 3.3.2.1 There are two exceptions when the connected party number is notpresented to the calling party:
-
-
-
- i) when the connected party has (see definition of Connected Line Identification Restriction) an arrangement that
- presentation of his number is not allowed; or
-
-
-
- ii) when the connected party number is not available, e.g., due to interworking with the (analogue) Public Switched
- Telephone Network (PSTN).
-
-
-
- In such cases the calling party shall be given a number unavailable indication.
-
-
-
- If the network check on the connected party provided number is unsuccessful, the network default number will be used
- instead.
-
-
-
- 3.4 Alternative procedures
-
-
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- None identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- Override category
-
-
-
- In some cases where a connected party has an arrangement that presentation of his number is not allowed, there may
- be certain categories of calling party that have the ability to override this restriction and have the connected number pre-
- sented. This function is a national matter.
-
-
-
- Problems may occur when the connected party does not belong to the same network as the calling party and in the
- connected party's network the override category does not exist, but in the calling party's network this category does exist.
- A problem occurs when a connected party who restricts presentation and assumes that his number is never presented,
- receives a call from a calling party who has the override category.
-
-
-
- The cases where the override category is applied is a national matter. Depending on bilateral agreement about the
- application of the override category in country A, and the presentation not allowed arrangement of the connected party in
- country B, country B may or may not deliver the connected line identification to country A. Agreements are also needed
- with any transit network.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service.
-
-
-
- 5. Interworking requirements
-
-
-
- On calls destined for some non-ISDN networks, the connected number may be delivered to the originating ISDN without
- the ability to indicate whether presentation is allowed or not. How the ISDN should behave in this case is for further study.
-
-
-
- On calls destined for some other non-ISDN networks, no connected party number may be available to the ISDN and
- therefore the full number of the connected party cannot be given to the calling party who has been provided with COLP. In
- this situation a partial number shall be given unless no information is available whereupon a number unavailable indication
- is given to the calling party.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.2 Call Transfer
-
-
-
- Assume the situation where a User A has an established call with a UserB and wishes to transfer this call with User
- B to a User C.
-
-
-
- Except in the case where User C prohibits the presentation of his number, User C's number shall be presented:
-
-
-
- - to User B upon successful completion of the transfer to UserC (independent of the type of transfer procedure
- invoked by UserA) provided that User B has subscribed to COLP;
-
-
-
- - to User A when User A is using normal or explicit transfer procedures and has subscribed to COLP. The con-
- nected party's number will not be presented to User A if User A invokes the single step Call Transfer procedure.
-
-
-
- Note that the connected number presentation may not be possible if interworking with a non-ISDN network is invoked in
- the call transfer.
-
-
-
- 6.3 Connected Line Identification Presentation
-
-
-
- Not applicable.
-
-
-
- 6.4 Connected Line Identification Restriction
-
-
-
- The connected line identification will not be presented if the connected User has subscribed to COLR.
-
-
-
- 6.5 Calling Line Identification Presentation
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.6 Calling Line Identification Restriction
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.7 Closed User Group
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.8 Conference Calling
-
-
-
- A Conference Controller who has also subscribed to COLP should be presented with the connected party's number when
- that party is either part of the initial activation of the conference or is added as a new conferee to an existing conference.
-
-
-
- Conferees in an existing conference who have subscribed to COLP will notreceive a new party's number whenever a
- conference controller adds a new party to the conference.
-
-
-
- 6.9 Direct Dialling In
-
-
-
- For further study.
-
-
-
- 6.10 Diversion services
-
-
-
- 6.10.1 Call Forwarding Busy (CFB)
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- Assume a calling User A, who has subscribed to COLP, places a call to a User B who is busy and this call is forwarded
- to a User C. If User B has also subscribed to a notification option with his CFB service, calling User A may receive the for-
- warded-to User C's number with the notification of the forwarding. In any event, assuming User C answers the call, User
- C's number will be returned to User A unless User C has subscribed to COLR.
-
-
-
- 6.10.2 Call Forwarding No Reply (CFNR)
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- Assume a calling User A, who has subscribed to COLP, places a call to a User B who has subscribed to the CFNR ser-
- vice, and who does not reply to the call within the subscribed time interval. If User B has also subscribed to a notification
- option with his CFNR service, calling User A may receive the forwarded-to User C's number with the notification of the
- forwarding. In any event, assuming User C answers the call, User C's number will be returned to User A unless User C has
- subscribed to COLR.
-
-
-
- 6.10.3 Call Forwarding Unconditional (CFU)
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- Assume a calling User A, who has subscribed to COLP, places a call to a User B who has subscribed to the CFU ser-
- vice. This call to User B would then be forwarded to User C. If User B has also subscribed to a notification option with his
- CFU service, calling User A may receive the forwarded-to User C's number with the notification of the forwarding. In any
- event, assuming User C answers the call, User C's number will be returned to User A unless User C has subscribed to
- COLR.
-
-
-
- 6.11 Line Hunting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.12 Three-Party Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.13 User-to-User Signalling
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.14 Multiple Subscriber Number
-
-
-
- Assume User A, who has subscribed to COLP, places a call to a User B to which the network is applying the MSN ser-
- vice. Assuming User B answers the call, the connected number at B (which may be identical to the called number) will be
- returned to User A unless User B has subscribed to COLR. Other interactions are for further study.
-
-
-
- 6.15 Call Hold Service
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 6.16 Advice of Charge
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- 7. Dynamic description
-
-
-
- The dynamic description for this service is shown in Figure 1/I.251.5.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- I.251.6 Connected Line Identification Restriction
-
-
-
- 1. Definition
-
-
-
- Connected Line Identification Restriction (COLR) is a supplementary service offered to the connected party to restrict
- presentation of the connected party's ISDN-number to the calling party.
-
-
-
- 2. Description
-
-
-
- 2.1 General description
-
-
-
- When COLR is applicable and activated, the destination node provides the originating node with a notification that the
- connected party's ISDN number is not allowed to be presented to the calling party. In this case no connected party number
- is included in the call connected information to the calling party's installation.
-
-
-
- Note - When COLR is subscribed to, some Network Providers may not wish to sendthe identity of the connected customer
- to other Network Providers.
-
-
-
- 2.2 Specific terminology
-
-
-
- None identified.
-
-
-
- 2.3 Qualifications on the applicability to telecommunications services
-
-
-
- None identified, i.e., this supplementary service is applicable to all telecommunication services.
-
-
-
- 3. Procedures
-
-
-
- 3.1 Provision/withdrawal
-
-
-
- COLR can be provided on a subscription basis or be generally available.
-
-
-
- As a network provider option, COLR can be offered with several subscription options. The options apply separately to
- each ISDN number. Subscription options are summarized below:
-
-
-
- Subscription Option Values
-
-
-
- COLR mode - permanent (active for all calls)
-
- - temporary (specified by user per call)
-
-
-
- Default - presentation restricted
-
- (only for temporary mode) - presentation not restricted
-
-
-
- It is a network provider option to specify either or both of the above options for all subscribers, for instance, in an
- exchange or network.
-
-
-
- 3.2 Normal procedures
-
-
-
- 3.2.1 Activation/deactivation/registration
-
-
-
- If subscribed to in the permanent mode, COLR is always activated. If subscribed to on a temporary basis, COLR is
- activated upon explicit request for the service, or on default, on a particular call and is deactivated after that call.
-
-
-
- 3.2.2 Invocation and operation
-
-
-
- If the calling party subscribes to Connected Line Identification Presentation and the connected party has COLR acti-
- vated, the calling party shall receive an indication that the connected party number is not available.
-
-
-
- 3.3 Exceptional procedures
-
-
-
- 3.3.1 Activation/deactivation/registration
-
-
-
- No exceptional procedures identified.
-
-
-
- 3.3.2 Invocation and operation
-
-
-
- No exceptional procedures identified.
-
-
-
- 3.4 Alternative procedures
-
-
-
- 3.4.1 Activation/deactivation/registration
-
-
-
- No alternative procedures identified.
-
-
-
- 3.4.2 Invocation and operation
-
-
-
- Certain countries may define categories of subscribers that have the ability to override the presentation restriction and
- have the connected party's ISDN number presented (e.g., the police).
-
-
-
- The ability to have such override category is a national option.
-
-
-
- When a call originates in one ISDN and terminates in another ISDN and COLR is applied, the rules and regulations of the
- destination network (the host network) should apply. For example, if override category is not applicable in the originating
- network but in the destination network a call with COLR applied can still be overridden in the destination network, whenever
- information on the connected line is available for this network.
-
-
-
- 4. Network capabilities for charging
-
-
-
- This Recommendation does not cover charging principles. Future Recommendations in the D-Series are expected to
- contain that information. It shall be possible to charge the subscriber accurately for the service.
-
-
-
- 5. Interworking requirements
-
-
-
- On calls to or via non-ISDNS, it cannot be assured that a COLR indication can be carried to the originating network.
- As a national option the destination network shall have the possibility to restrict any information identifying the connected
- party from being returned to the originating network when COLR is applicable. If a network receives a connected party ISDN
- number without any indication of presentation allowed or restricted, the originating network (the host network) will act
- according to its rules and regulations.
-
-
-
- 6. Interaction with other supplementary services
-
-
-
- 6.1 Call Waiting
-
-
-
- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
-
-
-
- Assume that a call from a User at C, invokes Call Waiting at UserB, who has subscribed to the COLR service. The UserB
- would receive a call waiting indication but would not have his number returned when the call waiting indication is given.
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- 6.2 Call Transfer
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- Assume that User A has an established call with UserB and wishes to transfer this call with UserB to a UserC.
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- If UserC has subscribed to COLR, then User A shall not receive the connected number when UserA invokes any call
- transfer procedure. If UserC has subscribed to COLR, then UserB shall not receive the connected number during the trans-
- fer of UserB to UserC.
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- 6.3 Connected Line Identification Presentation
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- COLR will take precedence over COLP. The only occasion when a User subscribing to COLP can take precedence over
- COLR is when the User has an override category. This is a national option.
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- 6.4 Conencted Line Identification Restriction
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- Not relevant.
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- 6.5 Calling Line Identification Presentation
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.6 Calling Line Identification Restriction
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.7 Closed User Group
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.8 Conference Call
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.9 Direct Dialling In
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.10 Diversion services
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- 6.10.1 Call Forwarding Busy
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- When the diverted call is finally answered, no connected number will be presented to the calling party unless this party
- has an override category. The latter is a national option.
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- 6.10.2 Call Forwarding No Reply
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- When the diverted call is finally answered, no connected number will be presented to the calling party unless this party
- has an override category. The latter is a national option.
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- 6.10.3 Call Forwarding Unconditional
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- When the diverted call is finally answered, no connected number will be presented to the calling party unless this party
- has an override category. The latter is a national option.
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- 6.11 Line Hunting
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.12 Three-Party Service
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.13 User-to-User Signalling
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.14 Multiple Subscriber Number
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.15 Call Hold Service
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 6.16 Advice of Charge
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- No impact, i.e. neither supplementary service affects the operation of the other supplementary service.
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- 7. Dynamic description
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- The dynamic description for this service is shown in Figure 1/I.251.6.
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- I.251.7 Malicious Call Identification
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- These services being identified need to be further studied and the descriptions are not yet included.
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- I.251.8 Sub-addressing
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- These services being identified need to be further studied and the descriptions are not yet included.
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