sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Telecom Service & Providers Ring voltage vs battery

I wouldn't be surprised if something was still strange on the pairgain. I went out with the VOM, Linemaster, and butt set, the voltages looked fine and I still had battery during the ring cycle.

Is the IPO grounded?

Also have a customer, way away from civilization, lines would not ring in when on the ATM-4 on an IPO 406 control unit. Would work fine when run into the former Partner system, and mapped to ring through to extensions that were then connected to the ATM-4.

Sandman's ring extenders did nothing.

ATM-16 module works fine.

Do you really mean UNinterrupted ringing?

Or do you mean that the interrupted ringing continues, un-tripped?

If you put a ringer across T & R during this sequence of events, does the ringer continue to ring, following the CO ringing cadence of 2 seconds on, 4 seconds off?

I think it's both the IPO and the pairgain. The IPO off hook resistance is probably higher than normal but is right on the edge- just enough to trip the ring on the other lines. The pairgain is on the edge the other way, requiring a "low but normal" off hook resistance. The IPO will work fine with the other lines and the pairgain line will work fine with other equipment like a buttset.

Just out of curiosity, could you measure the off hook line current with a buttset connected to the pairgain line then the IPO. Compare readings. I'm willing to bet that the IPO will draw less current.

-Hal

I'll give that a try next time I'm out there. Avaya is trying to find a tech of their own to send out but they've let so many go that I think they are looking in KCMO or the twin cities (both 3-4 hour drives from here).