> >>My specific issue has to do with ringing on my FXS ports. > >> > >>A Northen Telecom Harmony phone (circa 1983) rings normally but when I > >>connect my newer GE > > > > 2.4GHz cordless I never get more than 1/2 ring (it lights up and works > > fine... just can't get a > > ring from it). Normally I'd assume that it's a low power issue on the FXS > > port but with a phone > > rated at 0.1 REM? > > > >>I do have some strange voltages though.... > >> > >>ON-Hook: ~48V DC, 107V AC (this really concerns me...) > >>Off-hook: ~6V DC, ~12VAC (where the hell is this AC component coming > >>from???) > >>Ring: 0V DC, ~45V AC > >> > >>Suffice it to say that electrically this is completely out to lunch... I'd > >>like to throw an > > > > oscilloscope on the line to see what's what but I'm having trouble finding > > one. > > > > > > That on-hook AC is a real problem "if" the voltmeter is accuate. > > > > Couple of things to try.... > > > > 1. Go to the demarc, disconnect the in-house wiring and measure the AC > > component again (only looking towards the telco's CO). > > > > 2. Disconnect asterisk and install an ordinary analog phone. Take > > the phone off-hook and measure the AC. If the value is very small, > > then the voltmeter is measuring induced AC on the "unterminated" > > wiring. (The phone being off-hook creates the termination.) > > > > Put the phone on-hook and measure again. If the value is large, then > > go looking for the source of the induced AC. Things like wall-warts, > > fluorescent light ballasts, any device with a transformer in it, > > electric motors (of some fairly large size), desktop high intensity > > lamps (with internal transformer), etc, can cause inducedAC "if" > > they are within inches of the wiring. > > > > Using a scope would be good, but it will only validate the voltmeter > > results; nothing more. If you're unsure about the quality of the > > voltmeter, borrow another one from someone and compare the results. > > Doesn't anyone use Google anymore? > > http://lists.digium.com/pipermail/asterisk-users/2005-April/098934.html > > Also: > > http://www.google.com/search?hl=en&q=site%3Alists.digium.com+boostringer&btnG=Google+Search
Eric, those links have nothing to do with his stated problem. The problem is "105v AC on the pstn line when on-hook and no ringing". _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
