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From: steve@teletron.UUCP (Steve Tse)
Newsgroups: comp.dcom.lans
Subject: Re: Need help with a Novell network question
Message-ID: <87@teletron.UUCP>
Date: Thu, 25-Jun-87 11:39:44 EDT
Article-I.D.: teletron.87
Posted: Thu Jun 25 11:39:44 1987
Date-Received: Sun, 28-Jun-87 19:40:55 EDT
References: <239@irs1.UUCP> <764@nu3b2.UUCP>
Organization: TeleTronic Communications Ltd., Edmonton, Alta.
Lines: 31
Summary: AT&T StarLAN

In article <764@nu3b2.UUCP>, rwhite@nu3b2.UUCP (Robert C. White Jr.) writes:
> We have gone to "STARLAN"  <an AT&T product> which requires two pairs for
> each station [four if you dasy-chain them]  the other two pairs in an
> four pair may be used to carry voice/digital voice/data lines [with the
> jacks on the board providing splitters at the customer end but requireing
> 66-blocks or adapters at the phone room.  
> Starlan is rated at 1mbs but you get a (1) colision for every
> thousand (1000) packets on a bad day [if my monitor tells me true] so
> it evens out [they say they are going to speed it soon, should be nice]
> 

According to this follow-up article, it looks like you are an expert
in StarLAN. I think you may be the right one to answer the following
questions that I posted weeks ago.


# Has anyone had experience with AT&T's StarLAN network?

# I was wondering how good is the performance of this 1 Mb/s,
# twisted pair, CSMA/CD network in terms of utilization, throughput,
# latency, end to end delay and capacity.

# Since the StarLAN using an inverted tree hierarchical star topology,
# each message sent by a node has to propagate to the HHUB through all
# the imtermediate levels and back to the node through the same route.
# Will this cause tremendous of delay and lower the throughput of
# the system ?

Thanks,

ncc!teletron!steve