[asterisk-users] Anybody using TE410P on BT ISDN with DAHDI?

[A J Stiles]

Right.  I think I might be getting somewhere.

First I commented out all the lines relating to spans 2, 3 and 4 in 
my /etc/dahdi/system.conf and /etc/asterisk/chan_dahdi.conf, and set up a 
very minimal dialplan in /etc/asterisk/extensions.conf  (just 2 extensions).

Then I connected up just span 1  (which I know works, because it's been 
working fine with the old setup)  and started Asterisk.

Each extension managed to call the other OK.  Good so far.  And no warnings 
about missing D-channels.  Looking promising.  I even managed to call out -- 
but not back in, because my dialplan was incomplete.  One quick edit later, 
and I had inbound calls ringing both extensions.


Next I tried uncommenting just span 2 in  /etc/dahdi/system.conf 
and /etc/asterisk/chan_dahdi.conf, though without the cable plugged into the 
card.  And I got:

[Jun 22 21:12:00] WARNING[4175]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 16 as D-channel anyway!
[Jun 22 21:12:00] WARNING[4176]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 47 as D-channel anyway!

Plugging in span 2 made it work.  Unplugging span 2 made it not work:

[Jun 22 21:17:23] NOTICE[4616]: chan_dahdi.c:12690 pri_dchannel: PRI got 
event: HDLC Abort (6) on Primary D-channel of span 2
[Jun 22 21:17:34] ERROR[4616]: chan_dahdi.c:12389 dahdi_pri_error: PTP MDL 
can't handle error of type I
[Jun 22 21:17:34] ERROR[4616]: chan_dahdi.c:12389 dahdi_pri_error: MDL-ERROR 
(I): T200 = N200 in timer recovery state 8
[Jun 22 21:17:36] ERROR[4615]: chan_dahdi.c:12389 dahdi_pri_error: PTP MDL 
can't handle error of type I
[Jun 22 21:17:36] ERROR[4615]: chan_dahdi.c:12389 dahdi_pri_error: MDL-ERROR 
(I): T200 = N200 in timer recovery state 8
  == Primary D-Channel on span 2 down
[Jun 22 21:17:38] WARNING[4616]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 47 as D-channel anyway!
  == Primary D-Channel on span 1 down
[Jun 22 21:17:40] WARNING[4615]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 16 as D-channel anyway!
[Jun 22 21:17:42] WARNING[4616]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 47 as D-channel anyway!


So, as far as I can tell, the important thing is:  it doesn't like having 
spans uncommented in the config files that aren't connected to anything:  
even the ones that are connected to something, don't work.  In fact, even 
after commenting-out the unwanted lines and restarting DAHDI, I get:

[Jun 22 21:34:18] WARNING[5651]: chan_dahdi.c:4160 pri_find_dchan: No 
D-channels available!  Using Primary channel 16 as D-channel anyway!

and then I get

  == Primary D-Channel on span 1 up

after which, it works!  Calls between extensions, and in and out via the ISDN.  

Now I seem to be getting somewhere, at least.  Next step will be to go away 
for awhile and write a proper dialplan!

-- 
AJS