1. The MCU is a 3545 and we are using a 2600 series router as the gatekeeper with ipvoice_ivs IOS.2. The CUCM (Call Manager) is registered to the gatekeeper as a VOIP-GW, and the MCU is registered to the Gatekeeper as a H320-GW. That's how the two co...

I have a different issue:I have my CUCM and MCU registered to my gatekeeper successfully and they are able to make conference calls. My Cameras and 7900 series VoIPs are also able to participate in all conference calls. However my 9951 VoIPs are exp...