VG248 Line Voltage

ben-sharpibm · ‎03-24-2008

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?

Thanks

gogasca · ‎03-24-2008

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.

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_access/apg/vg248/v1_

0/hard_ins/vg248hws.htm

Take a look at CSCdu79519

Internally found moderate defect: Closed (C)

Voltage may be too low for some phones MWIs

Rob Huffman · ‎03-25-2008

Hi Ben,

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

Technical Specifications - VG248

Power

100-240 VAC, 50-60 Hz

Talk battery

-35V

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)

Connectors

Two RJ-21 female

Off-hook detect

Loop start only

Dialing

Dual tone multifrequency (DTMF) only

From this doc;

http://www.cisco.com/en/US/products/hw/gatecont/ps2250/products_data_sheet09186a008007c9bb.html#wp38824

Hope this helps!

Rob