Sorry but I'm on the same point: MOH doesn't work. MOH module is on Univ Card (module # 4). Option # 602 is ENABLE in all COS in use (rooms, trunks, digital phones, console, ...) now.

I took a look on cards and they are as follow:

Bay=02 Slot=03 UNIVERSAL CARD
02-03-01 CONSOLE MODULE
02-03-02 DTMF RECEIVER
02-03-03 DTMF RECEIVER
02-03-04 MUSIC PAGER MODULE (Music/Paging Module 9109-018-000)

Bay=02 Slot=04 UNIVERSAL CARD
02-04-01 CONSOLE MODULE
02-04-02 DTMF RECEIVER
02-04-03 Non programmed
02-04-04 Non programmed

I punched down on pair 23 of J25, MOH amplifier 600 ohm output, I'm able to hear it but several calls on hold and I just hear air".

Any other idea to checking, please.

THANKS.