ISDN T0 routing through ISDN T2 and QSIG documentation

[fabio300]

Hi,

I would like to check the documentation about the QSIG protocol on OXO located at "OMC > External Lines > Protocols".
Please, could anyone send me this documentation/technical communication? I don't have access to the BP website at the moment, and I can't find that on the expert documentation pdfs R7, 8 or 9.1.

I am configuring an ISDN T0 access on a BRA8 board, it will use a PRA-T2 ISDN channel to connect a router with the PSTN, but OXO releases the call right after the router's SETUP message.

Diagram:
Cisco 2901 Router 1 with BRI S/T V3 (wic-1b-st-v3) -> OXO with BRA8 and PRA-T2 ISDN T2 trunk -> PSTN -> Router 2.

I have attached a trace, it's a data call (unrestricted digital information) and I can't change it to Speech or 3.1kHz audio with G.711 on the router.
The same BRA8 access worked successfully with another OXO calling from an analog phone (with bearer capability: 3.1kHz audio with G.71), getting a channel of T2 (Main trunk group prefix) and calling a public DDI phone number.

Any help much appreciated.

Thanks.

Fábio
ACFE OXO R8
ACFE OXE R10