Music on Hold during a call

[m-hennigan]

I am seeing a very random issue with calls getting music on hold AFTER someone takes them off of hold. The music will be playing to the caller from the PSTN and I believe only they are hearing this. I have heard of this issue before and was hoping someone may have expierencined this and could shed some light on what may be happening.

I am running Call Manager 4.0(2a)SR1 with a 2651XM using an NM-HDV and VWIC-2MFT-T1.

[maharris]

Well, this is not very helpful, except to prove that we are not all crazy, this makes 3 of us I have seen - from earlier post:

MOH heard during a conversation

jaywydra - TECH SUPPORT, SBC

Sep 29, 2004, 7:50am PST

I have using who complain about hearing MOH while they are in a conversation. CCM version is 3.3.3ES58. Anyone seen this before?

Thanks,

Jason

maharris - Data Network Engineer, QWEST

Sep 29, 2004, 11:40am PST

We had one customer who experienced this, it was back around June-July 2003, the problem was very infrequent, seemed to go in spurts. It affected calls coming in through a gateway at a remote office, to IP phones at that remote. The IP phone user never heard it, but the PSTN caller heard it loud and clear through the course of the call - did not help to transfer them, put on hold, anything. They had a few things going on at once, and we upgraded them from CM 3.2 x to 3.3.2C and replaced the gateway router (which was a loaner 2621XM) with their purchased 2691(which also had to use newer code than the 2621XM, for a bug we ran into, don't remember what it was), and somewhere in there, the problem seemed to go away. They were using multicast MOH most of the time, we switched back to unicast a few times for different reasons, I don't know if the problem ever manifested then, but I couldn't say that it did not. Sorry I couldn't tell you anything more specific, but we have seen it!

Mary Beth

No real resolutions, though -sorry!

Mary Beth

[kthorngr]

Hi,

I have seen issues like this before, not specifically with MoH though. In general what is happening is that certain devices will always use the same UDP port to receive audio on. If for some reason a previous call invloving this device is not properly disconnected then the next call to the device will have two RTP streams destined for it. At this point the device could playout the streams from both sources as they are being received on the same UDP prt.

I have seen many causes for this. A packet capture will help determine where the phantom stream is coming from. Typically we will call this an orphaned stream as it should have been disconnected but due to some annomally the stream keeps playing even though the call disconnected.

If you can perform a packet capture of the problem and note the orphaned stream then a review of the previous calls in the Detailed CCM traces will help narrow down the problem. Mayhbe the call with the orpahned stream was not disconnected properly.

HTH,

Kevin

[kwooten]

There is a bug on this. it is fixed in version 12.3.7t and higher. We had the same issue on our remote locations useing 12.2.15zj3 and 2691xm routers. Hope this helps.