Hi Expert and Every Member,
My UC System include 2 CUCM 6.1 , 1 Unity Connection 2.0, 1 Voice Gateway 3825 with 12 FXO, 1 Operator with IP Phone 7962 ( 2 Expansion Module 7914). We can do outbound call very well. Unfortunately, when customer from PSTN do inbound call to my Operator, they sometimes get one way audio call that means customer can hear operator 's voice but Operator can not hear customer voice. This call is happen very intermittent about 10 inbound call success i get 1 one way audio inbound call. I try to do many ways to solve as below but it is still happen:
- Check IP Routing, i can ping everything.
- Add command : h323-gateway voip interface
h323-gateway voip bind srcaddr
voice rtp send-recv
- Set CUCM 's eth0 to auto, auto (1000Mbps)
- All IP Phone, VoiceGateway register on primary CUCM
My boss is not happy about that. Please give me your recommends to solve it quickly.
Thanks and best regards,
P/s: i send to you my Voice Gateway 's configuration