home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Internet Standards
/
CD2.mdf
/
ccitt
/
1992
/
e
/
e423.asc
< prev
next >
Wrap
Text File
|
1991-12-30
|
15KB
|
639 lines
Recommendation E.423
OBSERVATIONS ON TRAFFIC SET UP BY OPERATORS
1 Comments concerning the use of Table 1/E.423
1.1 This table summarizes observations relating to manual and semi-automatic
outgoing traffic originated by operators. These observations will be made, if
possible, during the whole ca Observations for the
categories 1 to 7 may be omitted in case of semi-automatic service,
if there is no problem regarding the efficiency of international
circuits.
1.2 Administrations should, if possible, make a distinction
between the different types of call, e.g. station-to-station,
personal and collect calls; they should use a separate
column for each under the heading "Type of call".
1.3 For collect calls, the times to be recorded will be those
observed in the country where the call request was made.
1.4 It is recommended that these observations be spread over the
whole day.
1.5 Each outgoing Administration will select the international
circuit groups on which observations should be carried
out.
1.6 In completing this table, reference should be made to the
following explanations:
2 How to fill in Table 1/E.423 (Traffic observations determined by the
operators)
Category 1 - This category should show the mean duration of calls
observed which are successful and have been charged for ("effective" calls).
Category 2 - This category will show the mean chargeable duration of all
effective calls observed.
Category 3 - This category will show, for each type of observed call, the
average time per effective call during which the international circuit has been
occupied for manoeuvres or for call preparation.
This average should be based on the time during which the international
circuit is held:
a) to obtain information concerning the called number;
b) to obtain information about routing and trunk codes;
c) to call operators, in the incoming international exchange;
d) to exchange information on how to set up the call;
e) to (or attempt to) obtain the called number even when it is engaged or
does not reply;
f) to (or attempt to) obtain the called person (in personal calls);
g) between replacement of the receiver by the called person and release of
the circuit;
h) because the operator is holding the circuit (whether she is on the line
or not) and for any other reasons for which the circuit is engaged.
TABLE 1/E.423
Observations on traffic set up by operators
International outgoing exchange
Circuit group
Service: semi-automatica)
manuala)
Period from to
Type of callb)
Category Ordinary Personal
1.Mean call duration - in seconds
2.Mean chargeable duration - in seconds
Fascicle II.3 - Rec. E.423 PAGE1
3.Mean holding time of circuits for
manoeuvres and preparation of calls - in
seconds
4.Number of effective calls observed
5.Mean number of times the international
circuit was seized per effective call
6.Mean number of "attempts" per effective
call
7.Percentage of calls set up at the first
"attempt"
8. Time-to-answer by Total
operators number of Calls answered Calls unanswered
calls (abandoned calls)
answered
and
unanswered
Mean
Num-
ber
PAGE4 Fascicle II.3 - Rec. E.423
waiti
ng under in 15 to After Within after
time 15 30 30 30 30
in seconds seconds seconds second seconds
secon
ds
Operators No. % No. % No. % No. % No. %
-incoming operator
(code 11)
-delay operator
Fascicle II.3 - Rec. E.423 PAGE1
(code 12)
-assistance operator
-information
operator
PAGE4 Fascicle II.3 - Rec. E.423
9.Quality of transmission from the Number % 10. Comments
subscriber's
viewpoint:
-good
-defective
Total 100
a) Delete whichever is inapplicable.
b) In accordance with S 1.2.
Fascicle II.3 - Rec. E.423 PAGE1
The times listed above, which exclude the conversation time, should be
added together. This total should be divided by the number of effective calls
observed during the period in question to obtain the value to be entered in Table
1/E.423.
Category 4 - The number of effective calls observed considered in category
1.
Category 5 - The mean number of times the international circuit was seized
per effective call (see category 3). This number is usually obtained by meter
recordings.
Category 6 - The mean number of attempts (as specifically defined
hereafter from the operating point of view) to set up a call. Should the operator
try several times to set up a call while continuously occupied on that call, all
these operations must be considered as being one attempt. Similarly, if the
operator makes several tries to set up a call and each time encounters a
congestion or busy condition and if, after the last try, she informs the caller,
only one attempt must be entered. Calls to information services or to obtain
routing particulars, and all calls not directly related to the establishment of a
call or to information required by the caller, should not be considered as
attempts and should not be included.
The total number of attempts during the period of observation should be
divided by the number of effective calls observed in the same period to obtain
the mean number of attempts per call.
The total number of attempts is usually determined from markings or
notations on call tickets.
Category 7 - The data for this category will be taken from all
tickets prepared for the relation concerned, during the period of
observation or a comparable period.
Category 8 - The mean waiting time for outgoing operators to
receive an answer will be indicated in seconds. This average will
include both answered and unanswered calls.
An outgoing operator waits on the circuit (waiting time) for
the period:
a) until the incoming operator answers, or
b) until she abandons the attempt, should the incoming operator not
answer.
Thus while mean waiting time relates to the outgoing operator it is also a
measure of the performance of the incoming operators.
Category 9 - It will be difficult to obtain absolutely comparable results
from all observers for this category. However, the observer should consider the
quality of transmission from the subscribers' viewpoint, taking into account
comments made in this respect by subscribers and the number of requests for
conversation to be repeated.
Category 10 - This category should include any comments likely to explain
the probable cause of difficulties frequently noted during the observations.
3 Automatic observations of the time-to-answerby operators (Comments
concerning the use of Table 2/E.423)
3.1 This table summarizes observation of the time-to-answer by operators.
3.2 Administrations should make a distinction between the different types of
incoming operators if the types of operators are distinguished by the selecting
digits.
3.3 It is recommended that these observations be spread over the whole day.
3.4 Each outgoing Administration will select the international circuit groups
on which observations should be carried out.
3.5 The time-to-answer of the assistance operator cannot be measured automatically.
3.6 In completing this table, reference should be made to the
explanations in S 4.
PAGE4 Fascicle II.3 - Rec. E.423
4 How to fill in Table 2/E.423 (Automatic observations of the time-to-answer
by operators)
The mean waiting time for outgoing operators to receive an answer will be
indicated in seconds. This average will include both answered and unanswered
calls.
The mean waiting time is defined as the time interval between the instant
the outgoing circuit is seized (the seizing signal is sent) and:
a) the instant the incoming operator answers, or
b) the instant the outgoing operator abandons the attempt (a clear-forward
signal is sent).
TABLE 2/E.423
Automatic observations of the time-to-answer by operators
International outgoing exchange
Circuit group
Service: semi-automatic
Period from to
Time-to-answer by Total number Calls answered Calls unanswered (abandoned
operators of calls calls)
answered and
unanswered
Mean
Numbe waitin under in 15 after within after
r g time 15 to 30 30 30
Operators: in seconds 30 seconds seconds seconds
second seconds
s
Num- % Num- % Num- % Num- % Num- %
ber ber ber ber ber
- incoming
operator
Fascicle II.3 - Rec. E.423 PAGE1
- delay operator
- information
operator
PAGE4 Fascicle II.3 - Rec. E.423
Fascicle II.3 - Rec. E.423 PAGE1
