how to influence the number transmitted after connecting

[Helge Oldach]

Nicolas Rachinsky:
> how can I influence the number which is transmitted to the caller
> after accepting a call with i4btel?
> 
> |-- NT->TE - unit:2 - frame:244770 - time:19.08 01:00:19.162098 -
> |length:29 -----
> |Q931: pd=Q.931/I.451, cr=0x01 (from destination), message=CONNECT: 
> |     [date/time: 19.08.03 01:00]
> |     [connected number (Q.951): 8914959497 (type=national, plan=ISDN,
>                                  ^this one
> |          presentation allowed, screening network provided)]

You can't, generally. While Q.931 permits the call originator to
transmit arbitrary digits as his "number", the network generally
restricts this to the digits matching the real number. Note "screening
network provided" which clearly says that the number you are seeing in
this example is provided by the switch.

There are certain cases (usually PRI connections, once they are
configured for "CLIP - no screening") which allow to transmit arbitrary
numbers. Theoretically this is also possible for BRI, but it isn't done,
for obvious reasons.

See the terms CLIP, CLIR, etc. for a more detailed explanation.

Helge