sundance-communications.com/forum Forums Other TDM Phone Systems Iwatsu Telephones & Systems 600 ohm feed for Background Music

I've asked a similar question before but may not have stated it correctly. We have tried a variety of music sources to play music through our phones. The music cuts out on different phones randomly and stutters. If you hit the BGM button or pick up the handset the music sounds good again. This happens on all phones but they are all different. Our vendor said they think it's an ohm issue that that the input needs to be 600 ohm. We've tried: multiple cd players, mp3 players, and Satellite radio. Sometimes it sounds fine for periods of time, and then other times it will constantly cut in and out. Has anyone ever seen this?

I assume this is the ECS that you wrote about previously. You mentioned that callers on hold also hear the stutter. If this is true, and you are POSITIVE it is not the MIC issue that JBean talked about here , and if you've tried multiple music sources with a 600 ohm input and you're getting the same symptom with all of them, it seems time to look at the physical equipment.

Those are a lot of "ifs," but if you're SURE you looked at everything else, it might be time to swap it out.

Try a 1 watt amplifier. I've run into this issue on another system, and it's my experience that the devices you've mentioned just don't have enough to drive the MOH. You're lucky the BGM works without this problem.

Otherwise, and I'm not sure if this would help or not, you could try an impedence-matching transformer.

Justin

If the stutter problem you mention is happening while playing BGM thru the keyset speaker, check the duplex setting on the phones in question. Until ECS version 3.01, full duplex is the default setting for speakerphones, and the stuttering is caused by the keyset hands-free mic picking up background noise and pumping it thru the speaker.

A 1 watt input would be a little too hot for the MOH input jack. Typicaly, a line-level signal is all that's needed, and is adjusted with the on-card potentiometer. There is no requirement for a 600 ohm balanced input in this case.