Hi!
Thank you all for the info!
But I think I haven't explained my scenario well enough.
I am not relaying the calls to SIP.
What happens is the following (the scenario is: a call started from an
ISDN E1 PBX, through the asterisk, to the PSTN, and was answered by the
remote party):
1. A CONNECT comes from the PSTN containing a Display IE (which has info
sent by the telco that is used for billing purposes by the PBX) into
span 1 of the asterisk. (The telco is emulating an old billing procedure
based on an impulse count. This was commonly used in analog lines.)
2. The asterisk relays the call to span 2 (which is connected to the PBX).
3. The CONNECT that is sent from span 2 to the PBX does not have the
Display IE. The asterisk strips this IE from the CONNECT message.
This is my problem. Is there a way that i can force the asterisk not to
strip the Display IE?
Thanks and best regards to all,
?scar Patr?cio
Anthony Francis wrote:> Damon Estep wrote:
>
>> Try putting a 1 second wait as step 1 in the dialplan, the SIP invite
is probably being send before the display IE arrives. The display IE is used for
CNAM delivery, and should not exceed 15 characters.
>>
>> It is very common to put a message in the display IE that indicates
that the CNAM info will be sent in a subsequent Facility IE, and for that you
must wait 1 second.
>>
>> If the ISDN setup actually contains information in the display IE, and
that is not being captured as the CNAM (callerid(name)) you might need to
capture he ISDN messaging to debug it, the telco can usually provide such a
trace.
>>
>> I would bet that the display IE contains a information following
message, and what you really want is in the facility IE that follows. Very
common, as is the Wait(1) workaround.
>>
>>
>>
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Oscar Patricio
>> Sent: Wednesday, July 25, 2007 6:55 AM
>> To: asterisk-users at lists.digium.com
>> Subject: [asterisk-users] Display IE
>>
>> Hi!
>>
>> I have an Asterisk Box that has 2 E1 connections: one to the PSTN and
>> one to a PBX. It is acting as a telephony gateway. I have a problem:
the
>> PSTN sends information in the Display IE (in setup, information ,
>> etc.messages) that the PBX needs por internal processing.
>>
>> The asterisk does not relay the ISDN frames coming from the PSTN. It
>> regenerates them, and when it does, it ommits the Display IE.
>>
>> Is there a way that i can force the asterisk, not to ignore this IE in
>> the ISDN messages?
>>
>> If anyone can shed some light on this issue, i would be very grateful.
>>
>> Thanks in advance,
>>
>> Best regards,
>>
>> ?scar Patr?cio
>>
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>>
> Or trace it yourself with:
> pri intense debug span 1
>
> Make sure you change the 1 to whatever span these calls are coming across.
>
> Anthony
>
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