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,:-) ___________________________________________

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