I have a 551B Ksu id like to hook up in my work shop; I have it wired and on line 1, I can put the phone on hold, interrupter starts and lights flash. On line 2 when I push hold, the lamp just shuts off and the call drops. I have swapped the cards; that doesnt appear to be the issue.
On incoming calls on either card, the interrupter does not start, lamps dont blink and phones dont ring.
551B ksu with internal power supply and separate ringing supply.
Any help is much appreciated, I am sure there is something easy I am overlooking.
