[asterisk-dev] Call back functionality in libpri using QSig

Matthew Fredrickson creslin at digium.com
Tue Feb 21 07:58:53 MST 2006

On Feb 20, 2006, at 5:02 AM, Dinesh Nair wrote:

> On 02/19/06 04:24 Matthew Fredrickson said the following:
>> Yeah, I know it works like that from the SS7 side, using SCCP 
>> messages between point codes.  The remote end that wants the callback 
>> will be notified by the called end when the subscriber is free via an 
>> SCCP message.  It's probably similar (in structure) to the way it 
>> works w/ Q.SIG and such.
> it does, but for the life of me reading the ECMA standards, i cant 
> find the IE structure which implements CCBS and CCNR yet. perhaps 
> someone with much better Q.SIG kungfu could assist.

Just look for the section of the standard that contains the ASN.1.... 
:-)  Then take two advils, and call in the morning.  You'll need the 
advils for the headache you'll get.

Matthew Fredrickson

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