[comp.dcom.telecom] One Modem, Multiple Lines

kevin@gatech.edu> (01/06/90)

We have two phone numbers (a local and and 800) which our clients use
to dial-up our computer.  We have n lines connected to n modems on the
local line, and m lines connected to m modems on the 800 line.  (Both
the local and the 800 roll to the next number when busy.)

Of course, sometimes all n local lines are busy, and 0 of the 800
lines are busy or vice versa.

Is there a device which allows one to connect two phone lines to a
single modem (or single-line telephone, for that matter) such that
when one line rings, the other line is busied out, and the ringing
line is connected through to the device?  Is there a better way?

(Our 800 is provided as a channel on a T1 from AT&T, and our local
number is just an extension on our PBX.  What I wish we had, but do
not think we can get, is a deal where the 800 number rings on our
local extension.)
 

Kevin Kleinfelter @ Management Science America, Inc (404) 239-2347
gatech!nanovx!msa3b!kevin

macy@cwjcc.ins.cwru.edu (01/07/90)

In article <2635@accuvax.nwu.edu> you write:
X-Telecom-Digest: Volume 10, Issue 9, message 6 of 8

> ....request for a method of terminating two lines groups on
> one set uf modems...

In your specific case you have apparently:
	- DID incoming local lines thru your PBX
	- AT&T Megacom lines via T1 that terminate directly
	  on the modems.

This is a fairly common situation in order entry systems...

The most common solution is to have your AT&T T1's terminate on your
PBX as DID lines, too.  This is very common.  Where the DID number
dialed into the PBX is different than the DID dialed in on the outside
lines, set up a call forward to the correct desired group.  AT&T
actually prefers that Megacom services act as DID's, its easier for
their 4 ESS's to do.  Depending on the type of PBX (or Centrex) you
have, the T1's can terminate directly into the switch or channel banks
with tie line type channel cards terminating on your PBX as tie lines
or DID trunks will be req'd.  Talk to your equipment vendor.


 Macy M. Hallock, Jr.     macy@NCoast.ORG         uunet!aablue!fmsystm!macy
 F M Systems, Inc.      {uunet!backbone}!cwjcc.cwru.edu!ncoast!fmsystm!macy
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