[VoIP] T1 related Problem

Shane Young voiptandem at shaneyoung.com
Mon Feb 5 07:33:01 CST 2007


Quoting Lee Spenadel <lee at spenadel.com>:

> It may be wrong, but it works just fine :P
>
> I don't see why this shouldn't work.

Cool, maybe the t is "working" a different way :)

To do what I described, the dial statement should look like this:
_${OFFICECODE}863X,4,Dial(ZAP/21/ww${EXTEN:4}||t)

When the called phone answeres, can they hit # and get a prompt back  
from Asterisk? If so, then it's working as I described and is some  
hidden feature that allows you to use it where you put it rather than  
where the documentation states to put it (*CLI> show application dial)



> Yes, I did put a butt set on the line and listened.  It sounded just like
> what was being pulsed, the number 2 + the last digit dialed.
>
> -----Original Message-----
> From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of
> Shane Young
> Sent: Monday, February 05, 2007 1:02 AM
> To: voip at ckts.info
> Subject: Re: [VoIP] T1 related Problem
>
> The "t" that I suggested allows the called party to initiate a transfer by
> hitting the # key on their phone, however you have it in the wrong spot :)
>
> The dial string just looks plain wrong to me, not even sure how it works :)
>
> Any chance you could put a butt set on the line and see (hear) what's
> happening different.
>
>
> Quoting Lee Spenadel <lee at spenadel.com>:
>
>> What does that "t" at the end do?  I just cut over from a Linksys ATA
>> to my Adtran 850.  I couldn't get Asterisk to pulse out properly to
>> the Step switch until I put that "t" in my statement:
>>
>> Before: exten => _${OFFICECODE}863X,4,Dial(ZAP/21/ww${EXTEN:4})
>>
>> After: exten => _${OFFICECODE}863X,4,Dial(ZAP/21/t/ww${EXTEN:4})
>>
>> It now works!  I've spent the last 2 hours trying to figure out these
>> very strange happenings:
>>
>> When there's no battery connected to my FXO channel (any one for that
>> matter) I can see the pulsing on the FXO led.  The pulsing is correct
>> for the extension that I dialed.  However, when I connect battery to
>> it, such as an extension from my Stepper, I get consistent but strange
>> dialing.  No matter what extension I try to dial in Asterisk, the
>> Stepper sees digit 2 and whatever the last digit of the called
>> extension was.  For example, I dial 349-8630, the Stepper sees 20.
>> That's it.  If I dial 349-8692, Step sees 22.  It would always see the
>> first digit as 2 followed by the last digit of the called number.  I
>> was pulling my hair out of my head until I came upstairs and saw this
>> email from Shane.  I was following this thread between Shane and Kirt as
> I'm also getting the bridge messages.
>>
>>   -- Attempting native bridge of Zap/1-1 and Zap/21-1
>>
>> But it doesn't seem to be a problem.
>>
>> Thanks for inadvertently helping me solve my problem guys.
>>
>> Lee
>>
>> -----Original Message-----
>> From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf
>> Of Shane Young
>> Sent: Sunday, February 04, 2007 10:44 PM
>> To: voip at ckts.info
>> Subject: Re: [VoIP] T1 related Problem
>>
>> Well, as I said, the bridge doesn't happen until after it's done
>> dialing and has received an answer.
>>
>> I have to go back and look to see exactly what the problem was, but,
>> in the meantime, we should be able to disable the native bridging by
>> requesting Asterisk stay in the audio path all the time.
>>
>> Try adding a "t" to the end of the dial command like this:
>> Dial(zap/xx||t)
>>
>>
>>
>>
>>
>>
>> Quoting Kirt Stanfield <kirtley.stanfield at comcast.net>:
>>
>>> Shane,
>>>
>>> I have to think the native bridge must be involved. This problem only
>>> happens when the call originates and terminates on the T1 bank. Calls
>>> coming in from either my SIP phone or CNET go out just fine to my switch.
>>>
>>> Kirt
>>>
>>> Shane Young wrote:
>>>
>>>> Quoting Kirt Stanfield <kirtley.stanfield at comcast.net>:
>>>>
>>>>
>>>>
>>>>> Let me clarify oen thing.
>>>>>
>>>>> When I was using the TDM 400 card I never saw the message about the
>>>>> native bridge,a nd the same thing worked. The problem started when
>>>>> I went to T1 and stoppe dusing the tDM 400 (although it is still in
>>>>> the machine).
>>>>>
>>>>> It almost appears to be a timing problem - perhaps asterisk is
>>>>> trying the native bridging before it outpulses to the switch.
>>>>>
>>>>>
>>>>
>>>> I've never seen it either for a zap channel, however I have features
>>>> enabled which would always prevent it.
>>>>
>>>> Again, it waits until it get's the answer back from the channel
>>>> before it attempts this (as you show in your output) so I don't
>>>> think the native bridge is the problem.
>>>>
>>>> You could try putting in a wait in your dial string before dialing
>>>> to see if that helps.
>>>>
>>>> --Shane





More information about the VoIP mailing list