Voicespan

Interesting issue with a new installation recently. The customer has, for now, a single analogue line hooked up to our PBX via a Digium TDM410P card. The DAHDI configuration had a number of ‘extra’ values in chan_dahdi.conf to recognise Caller ID, etc. However, one of those values was making all outbound calls over the analogue line to drop after 5 mins.

Turns out that DAHDI wasn’t recognising that the call had been answered, and so timed the call out after 300 secs, with the message

‘Nobody picked up in 30000 ms’

appearing in the log.

Fixing the problem merely required the line

‘answeronpolarityswitch=yes’

to be changed to

‘answeronpolarityswitch=no’

If you’re experiencing the same problem then it’s worth a try.