Summary:ASTERISK-19363: DAHDI PRI channel becomes unusable after a while, and calls fail over it.
Reporter:Tyler Stewart (tstewart)Labels:
Date Opened:2012-02-14 16:13:52.000-0600Date Closed:2012-02-14 17:08:00.000-0600
Versions:Frequency of
Description:While the system is in use, eventually one of their PRI channels will cease to work. Any inbound calls to that channel fail, which is a serious problem when it happens to channel 1. We can see the SETUP being sent, and Asterisk responds with a RELEASE COMPLETE. There is also a debug message that shows up right before the RELEASE COMPLETE, that says:

DEBUG[15201]: sig_pri.c:4995 pri_dchannel: Span 3: SETUP requested unavailable channel 0/15.  Attempting to renegotiate.

Once this happens, it continues until they restart Asterisk (and possibly DAHDI; this is unclear at this point). In the CLI capture we have been examining, this problem happened to channel 15 on Span 3. The last known good call on that channel appears to have hung up normally as well. This call began at around [Feb  8 09:43:20] in the log, and was hung up at around [Feb  8 09:44:41].

The problem appears to begin at around [Feb  8 09:45:31] in the log and continues throughout. There does not appear to be anything out of the ordinary in the CLI capture to indicate what could be causing this.