Analog modem emulator?

[Cini, Richard]

Sellam:

	You're description is based on a remote telnet inbound connection
where you're coming in over the internet and using the host PC and the PBX
to route the call to the right one of the four modems on the computer from
the original example. In this case I agree with you -- it's one inbound
connection reaching one destination.
  
	I was talking about the VCF exhibit, where I believe you would still
need a modem bank. If I have two Apple II's each with a modem plugged into
the PBX and I "dial" extension 101 which is the host PC, won't I get a busy
when the second Apple dials "101"? I think you do need a modem bank on the
host PC with the fallover feature on the PBX programmed properly. The PBX is
simply acting as the "phone company" for purposes of connecting the two.


Rich


-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Vintage Computer Festival
Sent: Tuesday, August 02, 2005 2:22 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: Analog modem emulator?

On Tue, 2 Aug 2005, Cini, Richard wrote:

> Refining the BBS idea a bit, the problem with it is multiplexing. You'd
need
> to run a modem bank (like Hayes or Multitech) into the PBX and use an
n-port
> serial card in the host PC. The PBX I'm sure can be set for number
fallover
> so if you keep dialing extension "101" and it's busy, it will roll to
> extension 102, etc.

The modem bank off the host is not necessary.  The PBX solves the
multiplexing problem.  You have one modem on the gateway PC that is
connected to an extension on the PBX.  It can then dial any one of the
other extensions which will then connect it to one of the modems on the
target PC.

> I used to have a 24-modem (2400 baud) Multitech modem bank from an old DEC
> installation but I got rid of it a long time ago. Just another piece of
> hardware I should have kept...

That stuff is really common if you know where to look ;)

-- 

Sellam Ismail                                        Vintage Computer
Festival
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