One way audio for IP phones

[beirut]

Hi,
I have an OXE releaase 8.0.1 g150335h. recently, users in a specific subnet, (same subnet as CPU and Gd's) having one way audio.
users in others subnets, have no problem. 172.20.x.x

I have a DHCP configured, and I captured packets on one of the phones having the problem.
There is a flow of RTP packets between the source IP address and destination.
No errors on compressors.

OXE: 192.168.7.101
GD:192.168.7.121
EXT: 1513 192.168.7.11 called 1550 (192.168.7.139) 1121(192.168.106.34)

I have attached the trace

[oxeman4400]

did you set your router IP address?

[beirut]

yes , did, and issue is resolved by itself. I suspect issue with network.