Modèle: Addtel AD56K-EX
FM-VSP56e
Zoltrix Rockwell based Serial Wave Device
Zoltrix 56K Int Sp Phone (FMVSP56i)
FM-VSP56e
Zoltrix Rockwell based Serial Wave Device
Zoltrix 56K Int Sp Phone (FMVSP56i)
Editeur: Zoltrix
Zoltrix
Zoltrix, Inc
Zoltrix
Zoltrix, Inc
Type de périphérique: Modem
MEDIA
Modem
MEDIA
Modem
Système: WinXP
Filename: 56k8-v90.exe
Taille: 885.7KB
Taille: 885.7KB
Licence: Gratuit
(WinXP)
The phone ring is usually 20 Hz, but 60 Hz will work fine as you note. When a phone is taken off-hook, the shwnciitg equipment at the telco premises sees this and removes the ringing voltage an applies 48 VDC for the voice part. The phone impedance off-hook should be about 500 ohms. On hook is about 1200 ohms if I am remembering right. If the phone rings, you no longer need to keep the 90 VAC applies. Remove it and connect the 48 VDC. You need to watch your polarity. One way will work and the other way won’t. If the impedance changes correctly, and the audio works, the phone should be OK.