[SIPForum-discussion] SIP to PSTN

[Suryakanta Behera]

Hi,

I have a question. Can Anyone help

"In between two user agent a C5 switch is present and one is sip user
another is isup user , So who is responsible to convert SIP message to ISUP
message in C5 switch. Actually what C5 are doing there & What are the
functionality/Element contain C5 switch in particular situation".

Another Question
"In SIP to PSTN Call Flow In-between GW are there, Someone tell me after
sending ACM message "from SSP to GW" then GW what  it will send 180/183, if
it is sending 183-Res to SIP then Two-way RTP will flowing in between SIP
to GW  and one-way media will flowing SSP to GW"

Is it Correct ! If Correct, how two-way RTP will flowing in between SIP to
GW  and one-way media will flowing SSP to GW.



Please, describe briefly about this....

Thanks & Regards
Surya
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