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Cell Relay Retreat>List Archive>month:1998-Jul> msg00280



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Re: Optical vs. Electrical Interfaces

  • From: "Kevin Fleming" <no@spamming.now>
  • Date: Thu, 23 Jul 1998 17:24:47 +0100


Tim <2207leung@hknet.com> wrote in message <35B745CD.10E8@hknet.com>...
>Kevin Fleming wrote:
>>

>> The E3 is carried over fibre, to be sure, to you local exchange - but it
>> sounds like it is then carried over SDH to the ATM switch.
>
>The E3 is the PDH interface standard. Its spec should be referred to
>G703. It is intended to be carried over copper wire or coaxial cable.
>>

This electrical interface will only drive coax a couple hundred metres
without repearter/regenerators, so what I had intended to mean by "carried
over fibre" was in fact a line system to the local exchange ;-)
KF