Possible Routing issue?

[angel-moon]

All,

The scenario is centralized CM 7.x at HQ with remote sites A and B.  An MPLS network connects all sites.  Call #1 from Site A to Site B completes but there is no audio.  Hang up and make call #2 and the call completes with Audio working.  Any ideas on where to start looking?  I was thinking a routing issue on the MPLS service provider side.

[Gajanan Pande]

Angel,

1. Do you mean it happens with every phone user in Site A who is making call to another user in Site B ?

2. After the call# 1 is hung up, remaining calls have no issues ?

3. Is it the same experience for Site B users while calling site A users ?

4. What is the TX-RX packet count shown on the both phones for the call without Audio ?

5. Is there are site C & do they face similar issue while calling site A & B ?

6. Are the phones on latest firmware versions ?

7. Is this an issue with perticular phone models involved in that call ?

GP.