[Asterisk-Users] DID over analog?

[Rich Adamson]

> I've some DID's that I'm using for in-bound faxing, but I'm having some
> trouble with getting that working perfectly on my T1.  So I'm thinking of
> pointing them to an analog line.  Will the DID's simply come in over the
> analog, presumably sending the DID digits via DTMF?  Or is that not
> something that'll work?

There is no real technical reason why DID digits can't be sent over an
analog pstn line, however I do not know of any telco in the US that
actually supports that.

Twenty-plus years ago, that would be the "only" way of handling DID's
(since digital facilities didn't exist at that level), but the implemention
usually involved "E & M trunking" over analog circuits. I believe
asterisk does support at least some level of E & M trunking, but not
sure if it applies to the TDM04b-type cards.