[asterisk-dev] Passing out-of-band data in PRI call setup?

[Klaus Darilion]

I think you could use the DISPLAY IE. This could be used in SETUP 
message or for example in INFORMATION message.

regards
klaus

Tony Mountifield schrieb:
> I'm posting this to -dev because I would expect that if what I'm asking
> about is possible, it would require code changes to libpri and Asterisk
> to achieve it.
> 
> Given two Asterisk boxes connected to ISDN PRI trunks, assuming that the
> PSTN switches between them are compatible, is it theoretically possible
> for one box making a call to the other to pass out-of-band data related
> to the call as part of the call setup. Something like a sub-address,
> extension number or other token.
> 
> The scenario I am thinking of is where one of the boxes makes two
> simultaneous calls to the other box. The caller ID and called number
> would be the same for both calls. I am looking for some way for the
> called box to distinguish between the two calls, by having some kind
> of token with each call. Is there any kind of IE in Q.931 that could
> carry such a token and would be passed through intermediate switches
> along with the call setup?
> 
> Thanks in advance for any ideas.
> 
> Cheers
> Tony