Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hplabs!hpfcso!rjn
From: rjn@hpfcso.FC.HP.COM (Bob Niland)
Newsgroups: comp.sys.hp
Subject: Re: strange problems with uucp on HP9000/400+Telebit T1000
Message-ID: <7370329@hpfcso.FC.HP.COM>
Date: 3 Mar 91 06:10:38 GMT
References: <691@hp400p.sublink.ORG>
Organization: Hewlett-Packard/FSY Ft.Collins,CO,USA
Lines: 26

re: > Our ATP's are way down, our line keeps falling...

What's an ATP?

> The builtin serial async port of the HP340 appeared to lack any modem
> control, so we used it in "direct" mode, i.e.  a minor device of 0x900004.

It has TxD,RxD,CD,RI,DSR,DTR,CTS,RTS

> The T1000 was accordingly set for xon/xoff flow control, with the
> interface locked at 9600. 

I'm surprised that this worked at all.  The 340 has no buffering on the
serial port.  I would expect problems above 4800.

> Last week we upgraded to an HP 9000/400t, a much more powerful machine
> (lots of RAM, lots of disk, faster clock, etc), and HP/UX 7.03B.

The 400 Models have a 16 byte FIFO and CTS/RTS hardware flow control
available on the serial port at select code 9 (as do the 345 and 375).
You need 7.05 or a patch to enable these features.  If your local HP
support representative does not have the patch, have them contact me.

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                UUCP: [hplabs|hpfcse]!hpfcrjn!rjn     Ft Collins CO 80525-9599