Hello i have a strange behaviour for this new installation:
1 main site (site 1) with CUCM 6.1, 1 remote site (site 2) with 2811 and VG224 gateways. Both sites are connected with MPLS wan. I use location-based CAC and g729 codec for rtp stream between the 2 sites.
- When a pstn call arrives on site 2 pstn gateway and is directed to dect phones connected on site 2 vg224: dect rings, the call is answered and rtp streams are established correctly.
- But when a call comes from site 1 ip phone to the same dect phone on site 2 vg224: the dect rings, call is answered, the communication is established but there is no audio at all.
It's like rtp packet are not able to cross the wan. But how to explain that site 1 phones can call site 2 phones without problem.
From site 2 vg224, i can ping site 1 ip phone without problem. I try to force mgcp media address without any effect.
Hi, I just find the solution: vg224 mgcp gateway negociate g729br8 codec so i deactivate g729 annex b under callmanager service parameters ("Strip G.729 Annex B (Silence Suppression) from Capabilities"). Now audio calls work well in g729r8
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