[Asterisk-Users] SIP problem picking up the call

[RumaTech]

Hi, all

I am trying to call to particular destination via SIPNET (one of the VoIP 
providers).

I can succesfully dial and I can hear waiting tone, however nothing happens 
beyond it.

Here is what asterisk shows:

 Executing Dial("SIP/phone2-fa85", "SIP/sipnet/84959951017") in new stack
    -- Called sipnet/84959951017
    -- SIP/sipnet-f021 is ringing
    -- SIP/sipnet-f021 answered SIP/phone2-fa85
    -- Attempting native bridge of SIP/phone2-fa85 and SIP/sipnet-f021

Basically, RTP is not being set up.
It is not a codec problem.

Any ideas where to look next?
Thanks,
Rudolf