[NTLUG:Discuss] Off-Topic - ISDN Phones

[Jeff Rush]

re extra numbers, I think Greg is referring to the ability to have
multiple "directory numbers" on a single B channel.  A B
channel is a digital packet protocol and the actual phone#
dialed is communicated during call setup.  Greg's equipment,
if the right stuff, can decode those packets and make different
phones ring or in the case of a PBX (or a Linux app written
using the ISDN-CAPI device interface and the appropriate
ISDN card), can route to a fax line, forward, reject, etc. calls.

You already get two numbers with an ISDN line, one for
each B channel and you can get more.  You can also get
more SPIDs, independent of the directory numbers.

-Jeff Rush


On Wed, 18 Aug 1999 11:28:26 -0500, Kevin Brannen wrote:

>> As I understand it I can also have more numbers added on the same
>> circuit (upto 5 total) and the phones and T/A can be configured to
>> differentiate between the number called.
>
>I haven't heard about extra numbers, but I suppose it's possible.  It's
>a CAT3 line they run to your house, so there are multiple twisted pairs
>in the cable.  They just hook up 2 of them for normal service.  I
>suppose they could just hook up a few more to the block on your house
>and in their cabinet, if you router can handle the extra input.  But
>this is all a guess on my part.