Newsgroups: comp.dcom.lans
Path: utzoo!utgpu!cunews!dgbt!phil
From: phil@dgbt.doc.ca (Phil Blanchfield DGBT/DIP)
Subject: Re: Ethernet cabling/repeater specifications?
Message-ID: <1991Jan29.234730.26242@dgbt.doc.ca>
Organization: The Communications Research Centre, Ottawa, Canada
References: <1991Jan23.050705.5029@tmsoft.uucp> <19450@shlump.nac.dec.com> <7160.27a20db7@zeus.unomaha.edu>
Date: Tue, 29 Jan 91 23:47:30 GMT

In article <7160.27a20db7@zeus.unomaha.edu> network@zeus.unomaha.edu writes:
>In article <19450@shlump.nac.dec.com>, koning@koning.enet.dec.com (Paul Koning) writes:
>> 
>> The IEEE 802.3 spec calls each half-repeater a "repeater set".  It then
>> gives a maximum of 5 segments, of which at most 3 can be coax segments,
>> and 4 repeater sets.  So therefore:
>> 
>> b. If you have only local repeaters, you're allowed two.  What limits you
>>    here is the rule that you can have at most 3 coax segments.
>This of course assumes you don't have a multi-port repeater.  Also you
>can place a bridge in between repeater link your sets of two repeaters
>to get around this problem.
>Paul is quite correct about most fiber repeaters being half repeaters.

Does anyone know how a 10baseT concentrator fits in here?
Our site is just bringing up an Optical Data Systems 10BaseT network and I have
recently attached our old Thicknet segment to a concentrator box. This box
is then connected via fiber to another box in another building. Several
stations on this second concentrator access systems on the Thicknet.
Would these newfangled 10BaseT boxes count as a half-repeater or a full
repeater?

-- 
Phil Blanchfield
The Communications Research Centre 3701 Carling Avenue, Ottawa Ontario CANADA
Internet: phil@dgbt.doc.ca	OR	phil@dgbt.crc.dnd.ca