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From: lanmaint@nssdcb.gsfc.nasa.gov (Dave Yoest)
Newsgroups: comp.dcom.lans
Subject: Re: Tunnelling a T1 over a CATV Broadband
Message-ID: <4255@dftsrv.gsfc.nasa.gov>
Date: 7 Feb 91 12:32:40 GMT
References: <3996@gazette.bcm.tmc.edu>
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In article <3996@gazette.bcm.tmc.edu>, sob@tmc.edu (Stan Barber) writes...
> 
>I am looking for products to allow me to present a telco T1 point-to-point,
>but use a CATV broadband as the physical transport.
> 
>It would be similiar to existing products from companies like Hughes Lan 
>Systems (formerly Sytek) for lower speed protocol transparent modems.
> 
>Please send mail as I need this right away.
> 


Stan,

 We are doing exactly what you are trying to do. Transport T1 over
 our broadband LAN. I am assuming you have a bi-directional CATV
 system (High/Mid/Low split).

 We are using the Fairchild data corp M505 Broadand modem. It is
 available with many interfaces, DS1 (alias T1),DS2,V.35,RS449/422
 and TTL (there may be others available since we haven't bought 
 any for a year now).

 You purchase the M505 broadband modem with the desired interface 
 adapter, but these can be changed since the interface adapter is
 a modular plug in. 

 We have been very pleased with the units we purchased. They have
 been reliable (no failures), they are frequency agile (20-400Mhz)
 and have an efficency of 1.5 bits/hertz 

 You can contact Fairchild at:

    Fairchild Data Corp.
    350 N. Hayden Rd.
    Scottsdale,Az 85257
    Phone (602)949-1155


 Hope this helps!


 Dave Yoest
 LAN M&O section supervisor
 NASA/Goddard Space Flight Center
 Greenbelt, Md. 20646

 DYOEST@128.183.4.5
 DYOEST@ZAPHOD.GSFC.NASA.GOV