E1 is an Telecoms (ITU- previously CCITT) standard of long standing not of Cisco origin. It uses Time Division Multiplexing technology (TDM) with 32 time slots. TS0 is for Synchronisation and in a Channel associated E1 TS 16 is the signalling channel. In a CCS link TS1 is often used. The data can be channelised ie each time slot is a data channel or speech channel with mux equipment at the end or one big pipe connecting to a Router/PABX etc. (In this case the channels are all just used by the same source etc.)In the telecom world, 30 speech channels of 64 kb/s are available. In a CCS group of E1's only the first E1 needs a signalling channel so the remaining E1's provide 31 ccts. The North American equivalent is a T1 which has only 24 ccts.
Look for references in the Telecom area, Transmission or ITU standards area. Any text book on these topics should explain or talk to a service provider.
Regards,
Mike Higgins
______________________
Strategic Network Planner
Network Department ITD
email: [EMAIL PROTECTED]
-----Original Message-----
From: Peter Van Gup [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, July 11, 2000 2:25 AM
To: [EMAIL PROTECTED]
Subject: E1 question
Can someone tell me what is the maximum of timeslots on an E1 can be used to
transmit data. Does this depent on a Cisco interface or is there a standard
for. I also would like to no what are the difference between an channelized
and a unchannelized (framed /unframed) E1.
What kind of info is transmitted over TS 0 ?
Any help or good resources about an E1 are apreciated.
Thanks in advance
Michael.
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