[asterisk-users] DAHDI and Analogue lines (UK)

[Gordon Henderson]

Have an intersting issue whem migrating a site from Zap on 1.3 to DAHDI on 
1.4.. Nothing special about the hardware - older TDM400 card, 2 red 
modules fitted...

Both channels work fine under 1.2/Zaptel. With 1.4/DAHDI both channels 
still work OK, but only for one line - the 2nd line causes it to refuse to 
dial-out no matter which port it's plugged into.

The Lines are bog-standard BT analogue lines and we're about 2Km from the 
exchange. Both sound good to me and dial out OK with a test phone 
connected to them, but only one will dial-out via the PBX.

This is what I see:

[Jan  1 05:14:14] WARNING[1200]: app_dial.c:1237 dial_exec_full: Unable to create channel of type 'DAHDI' (cause 0 - Unknown)
   == Everyone is busy/congested at this time (1:0/0/1)

And yet the line isn't busy or congested - nothing's using it.

The output of dsx*CLI> dahdi show status
Description                              Alarms     IRQ        bpviol     CRC4
Wildcard TDM400P REV E/F Board 5         OK         0          0          0

is fine, as is:

dsx*CLI> dahdi show channels
    Chan Extension  Context         Language   MOH Interpret
  pseudo            default                    default
       1            incoming                   default
       2            incoming                   default

So I'm a bit stuck. Why doesn't DAHDI like that particular line? What does 
it do to it that Zap didn't?

Gordon