Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zaphod.mps.ohio-state.edu!usc!ucsd!pacbell.com!lll-winken!gauss.llnl.gov!casey
From: casey@gauss.llnl.gov (Casey Leedom)
Newsgroups: comp.dcom.modems
Subject: Re: Help: My telco has mid and high frequency loss
Message-ID: <89033@lll-winken.LLNL.GOV>
Date: 9 Jan 91 19:26:46 GMT
References: <88953@lll-winken.LLNL.GOV> <1991Jan9.074047.1894@ims.alaska.edu>
Sender: usenet@lll-winken.LLNL.GOV
Reply-To: casey@gauss.llnl.gov (Casey Leedom)
Organization: Lawrence Livermore National Laboratory
Lines: 35
Nntp-Posting-Host: gauss.llnl.gov

| From: floyd@ims.alaska.edu (Floyd Davidson)
| 
| >  4.	We're thinking of running twisted copper 6-pair throughout the
| >	house to accommodate future expansion with an Ethernet, AppleTalk
| >	net, and up to three phone lines.  Does anyone see any problem
| >	with cross talk doing this?
| 
| Depends on how you do it.  A cable should be terminated with the 
| proper load at both ends.  If you run a wire from point A to point
| B to point C with a jack at each point there will be only one time
| when the cable is properly terminated:  when point A and C are.

  Ah, I knew there was something I forgot to mention.  I'm thinking of
running the telco wires into the house to a punchdown block and then
wiring the house radially from there to each room.  I'll only connect
those room cables with instruments to the punch down block, leaving the
other room cables unconnected.  Thus, the circuit diagram will look
something like the following:

	G ------+-----------+--------- ...
	        |           |       
	R --------+-----------+------- ...
	        | |         | |     
	B -----------+-----------+---- ...
	        | |  |      | |  |  
	Y -------------+-----------+-- ...
	        | |  | |    | |  | |

	        room 1      room 2

Thus, I'm going to get rid of the currently serially connected line
arrangement.  This should have been question 5: is this a sensible thing
to do?

Casey