Path: utzoo!utgpu!water!watmath!clyde!bellcore!rutgers!gatech!bloom-beacon!oberon!cit-vax!elroy!peregrine!ccicpg!turnkey!stanton!donegan
From: donegan@stanton.TCC.COM (Steven P. Donegan)
Newsgroups: comp.dcom.lans
Subject: Re: Ethernet bridges above 56Kb
Summary: The T1 to 56K Gap in Bridges
Message-ID: <74@stanton.TCC.COM>
Date: 22 Jul 88 15:55:16 GMT
References: <9392@dartvax.Dartmouth.EDU>
Organization: Stanton Public Domain Systems, Stanton, Ca.
Lines: 21

In article <9392@dartvax.Dartmouth.EDU>, finn@eleazar.dartmouth.edu (Andy Behrens) writes:
> 
> All the bridges that I have seen either use an entire T1 circuit, or
> use only 56Kb of it.  Does anyone know of one which can be configured
> for data rates between these limits?

The Bridge Communications IB/3 is capable of operating at a wide variety of
speeds. I have used a pair (at 56k) for about a year and they are working
flawlessly. The price is steep though, 13-14k ea! You could get better
price/performance in the sub T1 range with ACC 4030's using 2 56k links for
each pair and use multiple pairs between sites as desired. The 4030's
support the spanning-tree protocols to allow multiple parallel links between
LAN segments (which could provide path/media diversity for disaster recovery).
The 4030 costs around 5k ea. so 224kb worth of internet bridgeing would
cost in the range of 20k as compared to 28k for Bridge.

-- 
Steven P. Donegan                 These opinions are given on MY time, not
Sr. Telecommunications Analyst    Western Digital's
Western Digital Corp.
stanton!donegan || donegan@stanton.TCC.COM || donegan%stanton@tcc.com