nanog mailing list archives

Re: what's channellized E1?


From: rpa () insnet net (Richard Almeida)
Date: Sun, 20 Sep 1998 12:15:29 +0100 (BST)

Yes, an E1 has 32 * 64k timeslots, one is reserved for timing (thus
leaving 31 real channels), and if your running ISDN on it, one gets
reserved for signalling (ts16)

(Or you can run an E1 in untimed mode and get a point to point 2048k circuit)

Many Euro telcos will provide a bunch of various size circuits adding
up to 31*64k delivered as an E1 at the ISP , the router then is told
which leased line is on which timeslots, and they then look like a bunch
of seperate interfaces. Very good for port density !

Regards
 Richard


In a previous message sully () mail usinternet com wrote:

I'm not 100% sure about Euro T1's, but I believe its this...

T1 - can be used for data in different forms.  Running Frame, ATM.. etc

A channelized T1 is provisioned to have 64k channels used for data/voice
(ISDN etc).

--Tim

At 04:33 PM 9/18/98 +0800, you wrote:
Hi friends,

A very very basic question:
What does "channellized E1" mean? What's its difference from a "normal"
E1 connection?

reply to my mail box, if you think such message is too basic posting 
on nanog, thanks.

regards,

Yu Ning
-- 
___________________________________________*

Yu Ning
ATM R&D Centre of
BUPT (Beijing U. of Posts&Telecom)
Beijing (ZIP:100876, MBox:147#), P.R.China 
Ideas ONLY reflect my own views,:-)
___________________________________________




-- 
Richard Almeida                         email: rpa () insnet net
Technical Director                      phone: +44 181 239 5000
Internet Network Services Ltd           fax:   +44 181 239 5001
The Education Exchange Ltd (EDEX)       mobile: /dev/null


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