I am trying to extend an existing CM 4.1.3 implementation with video conferencing. Customer bought an 3527 IP VC, software version 5.1
I configured the IP VC in peer-to-peer mode (without GK). The 3527 has been configured as a H.323 gateway in Call Manager.
I am not able to make outbound IP to ISDN calls, the 3527 simply rejects the first TCP syn packet from CM to port 1720 of IP VC. No error message in the log section of the IP VC 3527
No problems with ISDN to IP calls via IVR
Does anybody have ideas where to look?
Thanks in advance