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Connecting a Telecenter21 phone to an analog ext port on the SV9100 produces a clicking/ticking instead of a ring on the phone.

Any suggestions? Are the two pieces of hardware compatible?
What does a standard 2500 set sound like, or a butt set?
butt set rings no problem
It's specifically designed to work with the Rauland. The ringer circuit in the set is 12 VDC.
Make sure there isn't a Message Wait set on the port.

Dial *0 from the port

TY! we replaced all w nec SLT analogs
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