Re: [hylafax-users] FOIP?

[Peter Halliday <peter@xxxxxxxxxxx>]

Ok, sounds like then to access POTS you would need a gateway.  However, then 
number of modems you have is then just the number of software drivers you use.  
Sounds like we are only limited by bandwidth at this point and hardware.

Peter


Quoting Lee Howard <faxguy@xxxxxxxxxxxxxxxx>:

> On 2004.03.05 08:15 Peter Halliday wrote:
> > Lee,
> > 
> > It sounds like OpenH323 is used to create the virtual modems, and a
> > cisco
> > gateway is needed.  HOwever, I'm not sure where the modems come in, or
> > are they
> > not needed?
> 
> I am by no means a VoIP/FoIP expert.  So I can only try to share 
> information that I think I've learned about this.  There are others on 
> this list, however, that *are* VoIP/FoIP experts and some even use 
> t38modem regularly.  So understand I may be dead-wrong here, but...
> 
> With VoIP/FoIP the communication happens over the IP network (be it 
> your LAN, WAN, or internet).  The IP communication happens directly 
> between VoIP/FoIP device end-points (t38modem-to-t38modem, for 
> example).  If a call needs to go out to the POTS, then one end-point 
> must serve as a "gateway".  Cisco makes these.  I think that an 
> Asterisk box will even serve this purpose, too.
> 
> The t38modem provides an interface between the FoIP/VoIP IP network and 
> the DTE (HylaFAX).  It is a DCE (modem), but is completely software.  
> Think of it as a "driver" to use your network card as a modem.
> 
> So if you never need to reach the POTS, then no, you don't need any 
> traditional modem.  If you do need to reach the POTS, then yes, you'll 
> need a gateway somewhere on the IP network.
> 
> Lee.
> 




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