[asterisk-users] Connecting a Rolm CBX to Asterisk via T1?

[Joshua Kinard]

-----Original Message-----
From: Lee Howard 

> So, okay, there are four calls coming in on the Zap (strange, but...)

There's definitely some kind of a timing error here.  I cut my channels back down to 1, as the Rolm isn't waiting long enough for an answer back from the asterisk server, and it gives up too early with a busy tone now.  What I'm seeing is the asterisk server taking too long to respond in kind, only to find the Rolm's quit and gone home already.

Also, asterisk seems to have signalling=em and signalling=em_w mixed up, as I have to use signalling=em to see a wink sent back down to my Rolm.  em_w does nothing.

An attached text file (rolm-asterisk-chatter.txt) is what my Rolm is seeing.  Notes on each line are on the right and are my additions.

Another attached text file shows what iaxmodem is doing during all of this.  Something about adjusting skew.


Here's what Asterisk itself sees (appears long after the Rolm went to busy tone):

    -- Starting simple switch on 'Zap/1-1'
    -- Executing [s at fax-in:1] Dial("Zap/1-1", "IAX2/iaxmodem0/s") in new stack
    -- Called iaxmodem0/s
    -- Call accepted by 127.0.0.1 (format ulaw)
    -- Format for call is ulaw
    -- IAX2/iaxmodem0-3 is ringing
    -- IAX2/iaxmodem0-3 answered Zap/1-1
    -- Hungup 'IAX2/iaxmodem0-3'
  == Spawn extension (fax-in, s, 1) exited non-zero on 'Zap/1-1'
    -- Hungup 'Zap/1-1'

 
> And the other calls get busy and improperly run through the auto 
> fallthrough process (you *need* a Hangup in your dialplan fax-in context).

Added, how does this look?

exten => s,1,Dial(IAX2/iaxmodem0/${EXTEN})
exten => s,2,Busy
exten => s,3,Hangup


> I think that your zaptel/zapata configuration between the Rolm and 
> Asterisk on that T1 is misconfigured.  Set it up for PRI if you can... 
> it'll be a lot easier, is my guess.

Unfortunately, the Rolm only speaks plain T1 talk.  It's too old for PRI.  We have an Adtran Atlas unit infront of it that does the PRI->T1 translation that we get from our carrier, but to get another card for the Adtran is more than I'll be able to weasel out of my manager for now.

Cheers!,

--Josh
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