[asterisk-dev] Routing data modem calls

[Brian Candler]

On Fri, Jul 28, 2006 at 10:27:58AM +0100, Brian Candler wrote:
> Does anyone know if there's a standard mechanism for carrying data modem
> calls over a VoIP-type network? I know there's T.38 for fax, but I have not
> been able to find something equivalent for generic data modem calls.

To answer my own question, at least in part - there *is* a standard for
this, called V.150 (= V.150.0 + V.150.1), and Googling for that turns up the
sort of thing I was looking for.

(Sometimes, a bookshop is better than the Internet. I found a reference to
this standard in an O'Reilly book called "Switching to VoIP". However, even
this book says that if you need legacy modem services, you should just keep
some POTS lines around to support them :-)

I notice that the source for Asterisk 1.2.10 doesn't refer to V.150, but
Asterisk SVN at least decodes the frame type in frame.h / frame.c. Does this
mean there is some plan for this in the pipeline?

Thanks,

Brian.