Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!syd
From: syd@DSI.COM (Syd Weinstein)
Newsgroups: comp.dcom.modems
Subject: Re: Getting 1200-1300 cps with TB+
Message-ID: <1991Jan15.231011.12671@DSI.COM>
Date: 15 Jan 91 23:10:11 GMT
References: <1991Jan11.221103.26733@utgard.uucp> <1991Jan15.171905.17048@nstar.rn.com>
Reply-To: syd@DSI.COM
Distribution: na
Organization: Datacomp Systems, Inc.  Huntingdon Valley, PA
Lines: 32

larry@nstar.rn.com (Larry Snyder) writes:
>chris@utgard.uucp (Chris Anderson) writes:
>>I have a TB+ on a Plexus P-95 that is getting about 760cps
>>throughput with HDB uucp.  I'd like to be getting in the 
>>1200-1400 range.  The load on the system is very light, so

>Does the Plexus support hardware flow control?
Yup, quite well, on the ACP.

>Can the Plexus support 19200 without the loss of characters?
Yup, in fact I ran tb+'s on P/60 (ICP, a slower version) at
19200 quite well, and even local tubes at 38400.

Some things to consider...  1.  Make sure that uucp is set to
do rts/cts flow control (this will take a shell script
wrapper, as by default it doesn't) (actually, due to the
short block size and the large buffers available in the ACP,
and the buffers in the modems, it works ok anyway)

Run at 19200 (note at 19200, the ACP only does about 1300-1400 cps
anyway (the characters are not quite back to back sometimes)

Run only a couple of these per ACP and mix other loads on each ACP.
(An acp can do up to 16 ports)

Make sure you are running patch 4 on the acp's to get the best
throughput (1.7 patch 4 or 1.8, no patches needed)
-- 
=====================================================================
Sydney S. Weinstein, CDP, CCP                   Elm Coordinator
Datacomp Systems, Inc.                          Voice: (215) 947-9900
syd@DSI.COM or dsinc!syd                        FAX:   (215) 938-0235