[Asterisk-Users] Issues with ringing on FXS ports

[Ian Pattison]

Ok... I've done a bit of emperical testing but don't really know what the results mean. I'm starting to think I need an oscilloscope to measure this properly. All I have is a DMM, I'm measuring on both the AC and DC scales...

Digium FXS Port
              AC Measurement            DC Measurement
On-hook       107V                               49V
Off-hook       11V                                6V
Ring             drops to 44V                    0V

Direct from Bell Canada
              AC Measurement            DC Measurement
On-hook        0V                               44V
Off-hook       0V                                6V
Ring              44V                              0V

Does this make any sense to anyone?

Thanks,

Ian

Ian Pattison, Senior Analyst
Technology Associates Inc.
Tel: 905-459-2100 ext. 204
Mobile: 416-568-6548
E-mail: ianp at technologyassociates.ca 
>>> r.scobie at clear.net.nz 04/01/05 3:24 PM >>>


Ian Pattison wrote:

> ringing. If I connect the GE cordless models I've been asked to use (0.1
> REN) they normally will not ring... they light up and indicate there's
> an incoming call and once or twice I've received 1/2 - 3/4 of a ring but
> never a complete ring or multiple rings. When connected directly to my
> incoming lines they ring normally. 
> 
> Normally I'd assume this was a power problem but at 0.1 REN?? Any other
> ideas I can try?
> 

Try adding the module parameter boostringer=1 when loading the wctdm 
driver. This raises the ringing volts to 89V peak.

Regards,

Richard
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