problem with VOIP & IP phone

anin_db

Dear Friends,

I have a problem without the soliution, if u can help me.......

At location A we are having Dial Peer configuration for FXS card,
registered with our Gatekeeper at location B.

* These VOIP Phones are able to do to and fro communication across
Intranet including VOIP / IP Phones.

* At same LAN we are having an physical IP Phone which is registered
with centralised Cisco Call Manager server.

* This IP Phone is also able to do to and fro communication across
Intranet including VOIP / IP Phones.

* But Voice communication is happening between both phones in oneway
manner only. It means Voice communication from VOIP Phone is reaching to IP Phone (Supose at location C) but From IP Phone it's not reaching till VOIP Phone.

* We have already checked Router, Local PIX, Remote PIX, Remote
router, Gatekeeper and CCM configuration but not able to find any
misconfiguration or any Hardware problem.

* At location A we are useing 3660 Router having IOS Ver 12.2(27a) and at location C 1750 Router having IOS Ver 12.1(20).

Thanks in advance