[Asterisk-Users] Pass-thru port on X100P Clone

[Kevin Walsh]

> > > Ok I already have a Cisco ATA-186 running SIP firmware, can I do
> > > dial-up through this? 
> > > 
> > You can try but I doubt that it'll work; You'll probably just get a
> > lot of echo-related problems via the X100P.  A modem/fax connection
> > would be more sensitive to echo and call quality than a voice call.
> > 
> > As I understand it, the SPA-3000 can provide a direct connection from
> > its FXS to its FXO, which should avoid this sort of problem.  I'll be
> > getting one to replace my home X101P very soon, so I'll know more then.
> >
> The spa-3000 only direct connects between the fxs and fxo ports when
> power is removed from the box, or when the ethernet cable is disconnected.
> Otherwise, fxs -> fxo is using the default codec (g711 unless changed).
> 
> In either case (ata186 or spa3000) the codec will limit the speed of
> any modem call through it, and the exact speed obtained will be highly
> dependent on specific implementations.
> 
That's all true.  I assumed that the SPA-3000 would make a direct
connection when asked, but it seems that it goes via an internal route
and uses G.711.

The original poster should find some other way to connect their modem
to the phone line - perhaps by getting a dedicated line or using ISDN
instead of analogue.  DSL will work too.  I imagine this all depends
upon whether the modem is used to connect to an ISP, or to some sort of
dedicated service (with no inet link) somewhere.

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