I have an Axxess and a Bogen TPU-100B.

I want the external horns to ring 24/7 whenever one of my lines are called.

Typically I would do this using a contact closure relay from the PBX.
I have a CPC64 that does not provide CC.
I do not have an OPC, however the docs I read state the relay connection is only active when the system is in nights. I need it all the time.

Any thoughts?

The TPU-100 has a TEL RING input you can connect that to a SLT port that rings

no sl card or sla....

Do you have room for one?

We usually sell the customer a basic keyset, and tap the speaker wires under the handset, and run them into an input on the paging amp. Works every time. Sometimes this requires an isolation transformer depending on where the amp + systems wall outlets are.

I have room for a card but for cost purposes the thing to do would be an sla.
thaks