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New Member

CP-7920 - 2 Wireless VOIP drops when calling each other

I can call from a hardline to a wireless voip phone, but the moment I bring out my wireless phone and call theirs, the phone rings but no voice is heard. I tried on different AP and same AP with same results.

Let me rephrase this. The call doesn't drop anymore the call seems to ring and is established, but I dont hear anything. I tested if the phones can call seperate hardlines and the call is established and both phones work. They just have trouble calling each other.

2 REPLIES
New Member

Re: CP-7920 - 2 Wireless VOIP drops when calling each other

Verify that you've allowed the Voice VLAN on the Trunk links between the two sites and main site to the callmanager.

Cisco Employee

Re: CP-7920 - 2 Wireless VOIP drops when calling each other

So the issue is calling 2 7920s on the same AP? Ensure that peer to peer blocking (aka PSPF) is not enabled.

Also that proxy arp is enabled.

For WLAN controller, do "show network" and ensure that arpunicast mode is disabled.

For autonomous, configure "dot11 arp-cache optional".

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