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- Path: news.fido.net!fidouk!2-254-235-0!richard.town
- From: Richard.Town@f235.n254.z2.fidonet.org (Richard Town)
- Newsgroups: comp.dcom.modems
- Subject: COURIER HAS CALLER I
- Date: 10 Mar 96 15:25:05
- Organization: Barney's Rubble
- Message-ID: <afd_9603120122@fidouk.fidonet.org>
- NNTP-Posting-Host: rubble.fidouk.org
-
- -=> Quoting Jeff Brielmaier to
- yaojunyaojunyaojun@tigger.uic.eduigger.uic.eduigger.uic.edu <=-
-
- Whom? :-)
-
- JB> It is transmitted via Bell 202 modulation standard (not a standard
- JB> modem modulation format).
- JB> In order to obtain the CID data, you need a Bell 202 type modulation
- JB> device
-
- Although the data signalling interface parameters match those of
- a Bell 202 modem, the receiving CPE need not be a Bell 202
- modem. A V.23 1200 bps modem receiver may be used to demodulate
- the Bell 202 signal. The ring indicate bit (RI) may be used on a
- modem to indicate when to monitor the phone line for CND
- information. After the RI bit sets, indicating the first ring
- burst, the host waits for the RI bit to reset. The host then
- configures the modem to monitor the phone line for CND
- information.
-
- JB> Then, the modem's software has to be able to convert the raw CID data
- JB> stream into "human readable" form.
-
- Here's how it's done on Zooms, no extra software is required:
- #CID=1 The modem will present the
- data items in a <Tag><Value> pair format. The expected pairs are
- data, time, caller code (telephone number), and name.
- #CID=2 Enables Caller ID with unformatted presentation to the DTE. The
- modem will present the entire packet of information, excluding the
- leading U's, in ASCII printable hex numbers.
-
- Result Codes:
- OK n = 0, 1, or 2.
- ERROR Otherwise.
-
- Inquiries
- #CID? Retrieves the current Caller ID mode from the modem.
- #CID=? Returns the mode capabilities of the modem in a list with each
- element separated by commas.
-
- Formatted Form Reporting
- The modem presents the data in the <tag> = <value> pair format as described
- in the table below. Spaces are present on both sides of the equal sign.
-
- Tag Description
- DATE DATE = MMDD where MM is the month number (01 to 12) and DD
- is the day number (01..31).
- TIME TIME = HHMM where HH is the hour number (00 to 23) and MM
- is the minute number (00 to 59).
- NMBR NMBR = <number> or P or O where <number> is the telephone
- number of the caller, where P indicates that the
- calling number information is not available since the
- originating caller has requested private service, and
- where O indicates that the calling number information
- is not available or out of service at the calling
- location.
- NAME NAME = <listing name> where <listing name> is the
- subscription name.
- MESG MESG = <data tag> <length of message> <data> <checksum>
- in printable ASCII hex numbers. This tag indicates a
- data item not listed above. The message is only
- possible for Multiple Message Format.
- Notes:
- 1. The modem does not present any Caller ID information if the
- DCE detects a checksum error in the Caller ID packet.
- 2. In the event of an unrecognized data tag, the modem will
- present the data in ASCII hex numbers following the MESG tag.
-
- Example of Formatted Form Reporting
- 1. The following example illustrates the standard Caller ID message
- packet.
- RING
- DATE = 0321
- TIME = 1405
- NMBR = 5045551234
- NAME = A N OTHER
- RING
- RING
- 2. The following example illustrates the case where the tag of the
- packet is not recognized by the modem.
- RING
- MESG = 060342424231
- RING
- RING
-
- Sorry, but this is _not_ available for use with BABT approved (UK) Zooms.
- BT, in its wisdom, transmits CallerId info before the first ring and not
- between rings. :-(
-
- If you'd like more info try:
-
- CALLID.TXT [06] Shortform description of UK's caller identity system.
- Contains details of units available in the UK
- USCALLID.TXT [06] How it should have been. Details of caller ident system
- in use most everywhere _else_ in the world :)
-
- rgdZ
- Richard
-
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