IP Phone Crosstalk

[Mitelmike2010]

Evening All,

Has anyone experienced crosstalk on internal IP extensions. This is not the first time this has been reported.

Caller A 1234 calls B on 4567, both extensions can hear a third party chatting away in the background, they cannot interrupt and they do not believe the third party can hear them, but they both can hear the conversation clearly.

The controller is a Mitel 3300 MXe , Running 4.2.

Both phones are 4025.

I noted that the IP address were next to each other. I.e 192.168.1.51 and 52. MAC address are quite different.

The switch infrastructure is cisco 6500 core and 3560 POE edge.

Any thoughts, comments or suggestions!

 

[boycey9]

Do you have an SRC perhaps, In normal circumstances two IP phones will stream data to each other so there is no way you can get cross talk, Unless you have some kind of proxy like an SRC I would say it has to be airbourne interferance.

 

[IrwinMFletcher]

I second that. Another possibility might be that they are routed out and back through the PSTN.

In a normal IP-IP call the streaming is end-end. Even on the off-chance that another endpoint is rogue and is streaming to one of those endpoints, the chances of it sounding 'normal' except for the inclusion of the other conversation is remote. And, even then, that both parties hear it would mean that there's also some acoustic coupling going on. Prefect storm material.

 

[LoopyLou]

Sure they are 4025 sets? Don't think there is a 4025 IP set.

I'd tell you a UDP joke but I'm afraid you won't get it. TCP jokes are the best because you always get them.

 

[Mitelmike2010]

The Sets are 5312 and both reside on the same Cisco switch. I am looking into the possibility that they may have still been connected to a trunk line.

Cheers

 

[LoopyLou]

try moving them to another port on the Cisco.

I'd tell you a UDP joke but I'm afraid you won't get it. TCP jokes are the best because you always get them.