[asterisk-users] TDM400P won't ring GM phone of mere 0.1B

[John Novack]

yliu11 at hotmail.com wrote:
> This is rather bizarre: My TDM11 (one FXS) rings a $10 passive phone with REN of 1.0B, a cheap speaker phone of 0.3B, and a cordless phone with marked REN of 0.0B.  But it couldn't properly ring this 27935GE3-B (FCC ID G9H2-7930) cordless phone rated at merely 0.1B.  Rarely, the phone will crack out an occasional weak and abrupt beap, but never a normal ring.  Otherwise Asterisk and TDM400P works with this phone, dialing, voice, callerID and all that. (In fact, when the FXS "rings", the display lights up as it should.)
>
> This is a dual-line 2.4 GHz cordless phone.  It rings normally when plugged into wall jack.
>
> Any idea?  Though not described in the manual specifications, Table B1 suggests that an FXS module (S110M?) supports at least REN 3.
>
> Yuan Liu_______________________________________________
>   
Have you tried toe boost ring voltage option then recompile Zaptel?
It is normally set to a fairly low voltage

John Novack