Setting up a Bogen Paging amp

[Eagle59]

Hello. I am having a bit of a challenge re-connecting a Bogen GS250 paging amp back into our Avaya system. It was set up and working some time ago but was removed some years back. I have a trunk group configured (TAC 162) and an analog station configured. When I patch in an analog phone into the assigned port (003v505) and call the assigned extension (49650) the phone rings and performs normally. When I patch a single twisted-pair (RJ45-pins 4 and 5) into 003v505, I get a dial tone out of Bogen amp/speaker, followed by the hi/lo error tone, then the speaker eventually goes quiet. Calling the extension 49650 when the amp is patched gets a tone, then an error "extension not valid". It looks like the amp connections are good but I'm missing some trunk configuration settings somewhere.
The paging trunk is set up as a wats type with loop-start. Dial access is yes. The puzzle is configuring the port in the trunk group. Port 003v505 is where the amp is patched but I cannot assign that port in the trunk group because it's already is use at the station. I can un-configure the port from the phone extension and assign it in the trunk but I still get errors when dialing the extension, TAC or access codes. What am I missing? I know this should be a simple set up. I've attempted a service ticket with Avaya on this and they seem beffudled by this also.
Any ideas?

 

[derfloh]

It's not a networking thing...

 

[Eagle59]

Yup, totally agree, not a "networking thing". Thanks for the insightful analysis. I suspect a fairly minor configuration setting that's been missed somewhere. We all know how complete the Avaya documentation can be and I've burrowed into the manuals as much as I could to dig out the missing pieces. I'm hoping somebody out there has been through this and can talk me through it. The Avaya help line was less than helpful.

 

[Eagle59]

Mystery solved. One of our IT guys was working in the overhead ceiling tiles and found the Lucent Universal Paging Module with the wires clipped off, just sitting on top of the tiles. I didn't know we had that. I didn't think we needed to use these units with the Bogen amp that had a direct 600ohm paging connection feature. I was going from the analog port on the MM711 directly to the amp. We patched in the UPM to the analog port and connected the output side to the Bogen amp. I reassigned the port to the extension, and called the assigned extension. After three rings, a beep and it works. The missing hardware was the key.

Shouldn't have been this challenging...