Re: [hylafax-users] Easy way to tell if a modem supports DID signaling?

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Nick Couchman wrote:
> I was wondering if anyone knows if there's an easy way to tell from 
> modem spec sheets whether or not a modem supports DID signaling.

You would know without needing to ask.  Really.

>  Do most of the ones that support this functionality say it, is it 
> part of another standard, etc.?

No, most modems do not support DID primarily because DID is not an 
option on a POTS line.

>  Anyone have any recommendations for a modem that does support this?

You would need a special line that provides DID in order to use a modem 
that supports DID.  The modem would need to correspond with the line, 
and thus providing a list for all of them would be further confusing to you.

> Also, for the modems I do have, is there a command I can issue to the 
> modem that will tell me whether or not the modem supports this?

No.

>  I'm having trouble figuring out whether my phone system is not 
> sending down DID information or if the modem is not receiving it, and 
> if I could determine if the modem supports it or not, that would help 
> me in figuring out what I should look at first.

Hrmm... "my phone system".  Ah, I suspect that you're talking about DTMF 
digits being sent after the call goes off-hook.  That's technically not 
DID... although your phone system documentation may refer to it as such 
simply because the DTMF digits correspond to the DID received by it.


Search for "SHIELDED_DTMF" in 'man hylafax-config' 
(http://hylafax.sourceforge.net/man/hylafax-config.php).  In the 
HylaFAX+ version of that man page there's even an example there that 
probably will work with your USR modem.

Thanks,

Lee.


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