[Asterisk-Users] "No D-channels available!"

[Ken D'Ambrosio]

I just tried to go from CAS to PRI on my T1 (Sangoma), and failed pretty
badly.  Seemingly everything worked -- Asterisk would see the incoming
call (including CID and DID info), try to route it, and fail -- giving
me a telco (not Asterisk) call failure message.  My zapata.conf and
zaptel.conf files are at http://pastebin.com/558349

Below's the log dump.

Note that, because I was simply going from CAS to PRI, I don't believe
the span definition line, itself, should have changed.

If anyone has any ideas, I'd sure be interested...

-- Accepting call from '1234567890' to '1630' on channel 0/1, span 1
Enabled echo cancellation on channel 1
-- Executing Goto("Zap/1-1", "internal|1630|1") in new stack
-- Goto (internal,1630,1)
-- Executing Dial("Zap/1-1", "SIP/1630|18") in new stack
Setting NAT on RTP to 0
Outgoing Call for 1630
-- Called 1630
(Provisional) Stopping retransmission (but retaining packet) on
'523660ad4664b876746acaf235de5cc7 at 10.20.1.79' Request 102: Found
-- SIP/1630-9ce0 is ringing
Requested indication 3 on channel Zap/1-1
!! Got reject for frame 0, retransmitting frame 0 now, updating n_r!
!! Got reject for frame 0, retransmitting frame 1 now, updating n_r!
Echo cancellation already on
== Primary D-Channel on span 1 down
No D-channels available!  Using Primary channel 24 as D-channel anyway!
== Primary D-Channel on span 1 up
update_call_counter(1630) - decrement call limit counter