Clicking on Pri and 200ICP

[pandabear1]

I have a 200ICP software release 5.0.2.3, the problem I am having is when an IP phone, and only IP phone none of the digital phones, call out on the Pri trunks the outside party hears a clicking about every 10 to 15 seconds, the inside pary never hears the clicking. Same clicking on same sets on an incoming call.

 

[IrwinMFletcher]

Do you hear that clicking on a digital phone if you call from an IP phone?

The idea is to try to isolate the source of the click. By calling a digital set, everything should be the same from the IP phone to the output of the E2T. If you hear the clicking there, then I'd work back and sniff the IP phone's output and see if it's in the packets coming from the phone...etc.

 

[pandabear1]

thanks for your reply, the only time there is clicking on the Pri is when an IP phone (in this case all 5340 sets)is on a Pri trunk call and it is only the outside party that hears the clicking. They have some 4025 sets and no problem with them.

 

[IrwinMFletcher]

So is internally from the IP set to the 4025, the 4025 doesn't hear the clicking, then it's past the E2T boundary on the TDM side.

Not that it will prove much, but can you hear it on a RAC call between the IP set and the PRI line? If you hear it on the RAC, then it's coming from inside the system somewhere.

 

[IrwinMFletcher]

Actually, have the external caller call into voicemail and see if they hear the click then. The difference between this and calling a 4025 is the that the call terminates on the controller.

 

[pandabear1]

hopefully I am answering your question here, there are no problems internally on any sets, no problems calling from the outside into the auto attendant, no problems with the 4025 phones at all for any calls only the IP sets in this case 5340 sets on a Pri trunk call and the external party is the only one who hears the clicking, the 5340 user does not hear the clicking. I am going to go to site next week and try a outgoing call on an analogue trunk that I will add to the unit just to test that also.

 

[IrwinMFletcher]

If an external caller doesn't hear the click while talking to the AA, then you would think that the E2T is slipping pushing packets onto the TDM bus (since the DSPs don't seem to have that issue with the AA). If that was the case however, you would also expect to hear the problem when the IP set is calling any other TDM device.

What compression are you using? Try G729 if you're not (between the IP phone and the E2T) and see if this makes a difference since it will be the DSPs generating the TDM output in this case, although it's input will still be driven by the E2T.

I'd first double check that in fact calling into the AA is fine, those calls are usually short and they may not be connected long enough to notice.

 

[pandabear1]

I thought I would update this post, I went to this site to work on this trouble, first thing I did was confirm the trouble again on site and then while I was there thought I would update the software to 5.0.2.7 and of course the switch does a reboot. Well I tested for the trouble after this and it was cleared. So I am not sure if the upgrade fixed it or the reboot, although a reboot had occured sometime ago for another reason and it did not clear. I know this trouble is not in the docs as cleared for that release so it is fixed but not 100 percent sure what cleared it.