February 2011 Archives

Asterisk Configuration Settings for outgoing calls - UK BT ISDN2e BRI

By Edward Bellamy on February 13, 2011 8:12 PM | Permalink | Comments (1) | TrackBacks (0)

The scenario:

You’re using Asterisk / FreePBX / Elastix / Trixbox
You’re attaching to UK BT BRI (ISDN2e) lines
Incoming BRI calls work
Outgoing BRI calls don’t work
When dialling using an outbound route you may hear, “All circuits are busy now” (Elastix you will)

You may see errors such as:

Ext: 1 Cause: Unallocated (unassigned) number (1), class = Normal Event (0) ]
“TRUNK Dial failed due to CHANUNAVAIL (hangupcause: 1) - failing through to other trunks”) in new stack

Potential Resolution:

Add to your dhadi-channels.conf the following for each span (we use Xorcom’s Astribank for BRI):

pridialplan=unknown

prilocaldialplan=unknown

Then just gracefully restart asterisk. To wait for an empty call volume, you can use this command in the asterisk terminal:

restart when convenient

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