Typically you would use a specific type of modem (dependent upon your connection) that has the proper chipset and driver to both connect and control the device.
In this case, a modem is not a modem. It is a modem because it takes an analog line in and codes/decodes it, but in sip, so it is really an analog gateway.
The more typical type of way of describing this is an in internal analog gateway, using the ZAPTEL and other drivers. They com in different densities and configurations. Alternately (instead of using a compatible card) you can use an external SIP gateway. And lastly, you can connect to a provider with a siptrunk (assuming your firewall is compatible and both firewall and nat profiles are configured properly) and send receiev calls without the use of a analog line.
The wiki has a list a compatible devices:
http://wiki.freeswitch.org/wiki/Interop_ListOn Sun, Sep 19, 2010 at 11:46 AM, Holger von Rhein
<lortas@freenet.de> wrote:
Hi all,
I plan to set up a VoIP/SIP switch at home. Further I'd like this switch
to also act as gateway into PSTN.
For this, I installed freeswitch and now I am looking around how to
connect it to my analog USB-Modem (it's a true modem, not a winmodem) to
FreeSwitch. By googling, by reading the documentation and the
mailinglist, I came to the implication that it is not supported by
FreeSwitch to be a PSTN-gateway via an analogue modem. I will need an
external PSTN-2-SIP-gateway.
Is my implication correct? If yes, will this change in future?
Does anyone have some hints for me, how to get a cheap solution? (Its
juts for home-use)
Is it correct, that in case of an ISDN-modem freeswitch is able to be a
PSTN-gateway?
Kind Regards,
Holger
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