FXS Ring Voltage

[balitewiczp]

Is it possible to set the ring voltage on an VG20X FXS port to 70-75V ?  Or on a VIC-FXS card?   I am trying to interface to a Valcom V 9940 paging unit, and this is what the vendor suggests

Thanks                  

[Rob Huffman]

Hi Pete,

I have not heard of that requirement before The VG20x does not have any

adjustments for ring voltage. You could try the VIC3-2FXS/DID-E;

Features

The  VIC3-2FXS-E/DID module supports all the voice features that exist on  VIC and VIC2 modules. In addition, the VIC3-2FXS-E/DID module also  supports:

• Mixed FXS and DID ports within the same VIC module

• Higher ringing voltage-65 Vrms (no load)

• Higher loop current 35 mA-to accommodate specialty phones

• Longer loop length-for loops with 26 AWG wire, up to 11,000 feet (3,400 meters)

• Device security-to distinguish between Cisco genuine and non-genuine Cisco modules

• Surge and Transient Protection per Network Equipment Building Standards (NEBS) (GR1089) Level 3 Type 1 and 3

http://www.cisco.com/en/US/solutions/collateral/ns340/ns517/ns477/ns296/application_note_c27_461821.html

Cheers!

Rob

"Show a little faith, there's magic in the night" - Springsteen

[Brian Meade]

Pete,

I've done many Valcom integrations with Cisco gateways.  I've always had success with a VIC2 and VIC3 FXS cards.  I haven't tried it with a VIC card.  I would doubt that the rinking voltage is the issue.  HAve you hooked up a multimeter on AC Voltage during a ring cycle to test the voltage?  I would try that.  I think the issue is more likely the cable or you are connected to the wrong port on the Valcom unit.  Some valcom units only work with FXO cards.

Brian

[balitewiczp]

Thanks for the quick response.  The ring voltage issue was suggested by Valcom TS, saying that at least 70-75v is needed.

I am connecting a v9940 to the fxo port.  I get a fast busy, fwiw.  I am not at the site, and wouldnt be able to hook a multimeter to measure ac voltage.  perhaps I will try a fxs port, but it would be off a VG20X gateway