I posted about this
a year or two ago:
Currently we can
find Cisco 801 ISDN Routers on ebay for about 40 euro. This equipment supports
RCAPI (CAPI over TCP) Think of it as a isdn-ethernet
adapter.
There are other
manufacturers who support this protocol in their ISDN Devices. (AVM, Bintec,
Draytek)
With the proper
drivers you could give Asterisk an ISDN interface over a TCP/IP
Connection.
The problem is that
altough the protocol exists for some years, there isn't any known implementation
of this idea integrated with asterisk.
One interesting use
of this technology would be to be able to run Asterisk completely independent
from hardware (in a virtual machine for example) while still supporting ISDN
connectivity, using cheap, reliable and easy to find ISDN "bridges" (Cisco 801's
for example)
I know for sure that
the protocol works, as I have some customers sending and receiving faxes, using
voice mail and ISDN soft-phones on Windows, using RVS-COM.
However I haven't
seen any linux implementation, and no one talking about using it with
asterisk.
Today I have found
some specifications and code samples from bintec (ftp://ftp.funkwerk-ec.com/pub/libcapi)
that I hope someone with more knowledge than me can use to evaluate the
possibility.
Maybe we can start a
bounty? I would gladly pay a reasonable amount for a working asterisk-Cisco 801
solution.
Best
Regards,
Daniel
Matos
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