Hello,

We have a sx-20 installed in 1996 with 40 extensions; and an attached call attendant.

Within the last two years, several extensions started dropping off-line (no dial tones)...now about 20 extensions do not work...we were told it could possible be the Misc Card?

My expertise is null with telephone equipment, I opened the case today and noticed the cards and recognized the MISC card. Is it as easy as switching cards inside of a computer or is there more to it? Could the Misc card be the cause of the problem or is it more complicated?

Thanks--raju


Thanks in advance for any help you may provide.