[asterisk-bugs] [Asterisk 0010451]: Sending caller ID to ZAP Extension fails if sendcalleridafter=0 or sendcalleridafter=1

[noreply at bugs.digium.com]

The following issue requires your FEEDBACK. 
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http://bugs.digium.com/view.php?id=10451 
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Reported By:                rjenkins
Assigned To:                
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Project:                    Asterisk
Issue ID:                   10451
Category:                   Channels/chan_zap
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.10.1  
SVN Branch (only for SVN checkouts, not tarball releases): N/A  
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             08-14-2007 15:20 CDT
Last Modified:              11-06-2007 19:18 CST
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Summary:                    Sending caller ID to ZAP Extension fails if
sendcalleridafter=0 or sendcalleridafter=1
Description: 
UK Caller ID setup is (or shoudl be):
cidsignalling=v23
cidstart=polarity
sendcalleridafter=0

This setup always fails to properly send the caller ID; logged error is:
WARNING[14416] chan_zap.c: Didn't finish Caller-ID spill. Cancelling.

(It still fails with sendcalleridafter=1, it must be 2 to avoid an
error.)

Ideally, with this setup the first actual ring should be deferred until a
short time after the cidspill has been completed (or the cidspill data
should include a 200mS silence at the end, allowing ring to follow
immediately).

The UK (British Telecom) standard timing sequence is:
Polarity reversal,
300mS delay (which may include other signalling),
V23 caller ID data burst, starting with 45 - 75mS MARK tone,
Minimum 200mS silence from end of data burst to start if ringing voltage.

[The idea is that caller ID can be received and processed before ring
voltage arrives, so unwanted calls can be muted without any ringing]

The formal timing diagram is on page 8 of the BT document here:
http://www1.btwebworld.com/sinet/242v2p3.pdf

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Issue History 
Date Modified   Username       Field                    Change               
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11-06-07 19:18  Corydon76      Status                   new => feedback     
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