[comp.dcom.lans] Tunnelling a T1 over a CATV Broadband

sob@tmc.edu (Stan Barber) (02/07/91)

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.

Thanks in advance. I will summarize if there is interest.
-- 
Stan           internet: sob@bcm.tmc.edu         Director, Networking 
Olan           uucp: {rutgers,mailrus}!bcm!sob   and Systems Support
Barber         Opinions expressed are only mine. Baylor College of Medicine

lanmaint@nssdcb.gsfc.nasa.gov (Dave Yoest) (02/07/91)

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