I have a 3300 with 7.1 and I'm having problems with the MoH, some calls have a very bad MoH sound (when they are on hold) and others have normal MoH.
Is there any thing I can check to solve this?
I'd recomend to use an external source such as CD whenever it's possible. Embedded MOH quality suffers once in a while and seems that's design issue. I've got multiple embedded recordings which play ads for different divisions and once in a wile people say that it souns horrible but at the next moment everything is fine and I cannot reproduce it. External source is always nice and clean.
check the properties of the wav file you uploaded. The help files quote 8Khz, 8 bit and mono, they also state a-law or u-law.
I had a problem recently where the file was a-law, i changed to u-law and it sounds perfect now....
Also be mindful of the fact that "music" utilizes as much or more network bandwidth than a voice conversation. Typically how many calls are on hold at once? Are they "holding" across IP trunks? In a bandwidth-constrained system disabling the Multiline set Music feature in COS can also relieve such congestion.
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