Originally posted by ev607797:
Yes, the ITT and San/Bar cards had option jumpers to select MOH. Their factory setting was no MOH, so one would have to change them and hopefully during this process, think about checking for the presence of A battery.
Man, in late 1983 & early 1984 we were getting the brand new San~Bar "400" or was it "4000" cards delivered to us in the Air Force with Music On Hold (MOH) enabled by default. This was a major problem considering we did not use MOH at the base I was stationed at in those days. For some reason the cards put a hum on the line that was unbearable until we disabled the MOH feature.
