HI! I have a new customer , asking for quote Tel/Paging not working ,,, I found 3 Horns 10-15watt,, 1- horn is connected by underground cable to a building 120 ft away ,, now the cable is on a normal 25 pair indoor cable , which goes into a conduit , so it has no ground sheath ,, the main problem is the 65 watt amp is fried , , i have put protection on telephone circuits ,, but what to u normally use for paging outputs to go underground ,, its 70Volt out put , i doubt they will replace the cable ,, the Digital nortel phone is working fine on the same cable. Thks

I think this was covered HERE.

-Hal

I will typically just send the audio over the cable and put a second amp in the remote location and that will usually stop any other issues with sending 70v over the same 25 pair as voice. Then you can use your typical surge protection.

Interesting, i thought the Nortel page port would be weak the time it gets 150ft. ??

That could be. What you need is a line level signal and phone systems are not exactly audio gear. You could use the little 1W amp that Bogen (GA2) makes to drive the MOH input on phones systems. Just feed it from the page out and connect the pair to the amp's 600 ohm out. It has its own level control too. 150 feet is nothing.

ETA: Looks like the GA2 has been discontinued but there seems to be plenty on Ebay.

-Hal

Phone system to Valcom v-1094A, then out to your paging amps, etc. (or maybe it was the v-1095)