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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Sat, 02 Jan 93 08:13:06 GMT
- From: pls@cibecue.az05.bull.com (Paul Schauble)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Anybody Know of LARGE Modem Server Systems?
- Message-ID: <telecom13.2.9@eecs.nwu.edu>
- Organization: Bull HN Information Systems, Inc., Phoenix Product Division
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 2, Message 9 of 12
- Lines: 25
-
- The request for a modem server for lots of modems brings up something
- I've been wondering about for a long time:
-
- Lots of modems means lots of incoming phone lines.
-
- First question: At what point does it become cheaper to have an incoming T1
- or T3 line and a switch on site?
-
- Second question: once you reach this point, the signal path becomes:
-
- - incoming DIGITAL signal delivered via Tx carrier
- - DIGITAL signal deliver to line card.
- - line card converts signal to ANALOG
- - ANALOG signal carried via wire pair to modem.
- - modem (usually) converts signal to DIGITAL
- - modem feeds DIGITAL signal to DSP to demodulate.
-
- This multiple conversion seems silly. Doesn't anyone make a modem that
- can directly eat the demultiplexed Tx data? Or better, eat the T1
- signal directly?
-
-
- ++PLS
-
-