[SIPForum-discussion] How to signal for a second dial

[Ashish Umrani]

Hi There,

The scenario is following

A user picks phone an dials a number.
The server detects (Based on callee) that more authentication is required
for this call.  (Auth code)
so the server send a signal for the second dial.
The caller enters new number and presses # at its end
The server authenticates the call


Similar scenarios are required in calling card, billing codes, auth codes
and many other functionalities.
Can some one send me sip signalling example for this.

Regards
Ashish
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