SIP Trunk - Some Calls the office cannot hear the person on the other end

[dsm600rr]

Hello all,

I have a client on a SIP Trunk that has reported a few instances of them not being able to hear the caller on the other end.

One instance they indicated the call started out fine and then all of a sudden lost remote end audio.

Thoughts?

ACSS

 

[pabx1121]

Is it possibly a NAT issue?. Have you considered registering the trunk directly to a SIP phone then see if there is any audio issues which would rule out it being the system and associated equipment or the actual trunk itself

 

[dsm600rr]

pabx1121: I contacted my SIP Provider and everything they are seeing on their end looks good from my IPO.

They have been on the SIP Trunk for about a month and this just all of a sudden happened a few times. Who knows - I could be on the other end as well.

If it happens again, I have them documenting:

Time the incident happened:

Date the incident happened:

Extension the incident happened on:

Was the call inbound or outbound:

Could the caller hear you?

Could you hear the caller?

I have confirmed with their Firewall Administrator that nothing has changed on the firewall.

One thing I did update to try:

I may try your suggestion of registering to a J100 phone directly.

My SIP Provider thinks it could possibly be something going on with the ISP and is testing a few things.


ACSS