VG248 Line Voltage

Unanswered Question
Mar 24th, 2008
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Hi Guys,

I have a problem where by i have an analouge phone hanging off a VG248 - all working fine, except this phone is a nurse call phone and requires a certain voltage running down the line. Can anyway give me the line specifications that the VG248 produces?


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gogasca Mon, 03/24/2008 - 20:20
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Have a look at this URL. It's at the bottom of the page where it shows the ringing voltage specifications. Hope this is what your looking for.


Take a look at CSCdu79519

Internally found moderate defect: Closed (C)

Voltage may be too low for some phones MWIs

Rob Huffman Tue, 03/25/2008 - 06:05
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Hi Ben,

Just to add a note to the good info from Gonz;

Technical Specifications - VG248


100-240 VAC, 50-60 Hz

Talk battery


Ringing voltage

46V rms with a 14V DC offset

Loop current

21 mA

Message-waiting voltage

93V DC (one second on, one second off)

Maximum line length

5000 feet or 415 ohms (on-premise only)

REN equivalence

3 (maximum 2 off hook)


Two RJ-21 female

Off-hook detect

Loop start only


Dual tone multifrequency (DTMF) only

From this doc;

Hope this helps!



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