W8SDZ@SIMTEL20.ARPA.UUCP (10/28/87)
I stand corrected (thanks, Ray!). The 4-chip update for the USR HST
9600 modem does NOT add MNP level 5. I was given that information by
someone who apparently had it confused with a new upgrade being
offered. I did notice an improvement in thruput when I changed the
chips last July but didn't know why. USR did not explain what the
4-chip swap was supposed to do.
FYI... I have been regularly using the HST 9600 to upload and download
a very large amount of public domain software for our archives at
SIMTEL20. Xmodem (1K blocks) and Zmodem (a stream protocol) both work
very well though this modem.
--Keith Petersen
Arpa: W8SDZ@SIMTEL20.ARPA
Uucp: {bellcore,decwrl,harvard,lll-crg,ucbvax,uw-beaver}!simtel20.arpa!w8sdz
GEnie: W8SDZ
RCP/M Royal Oak: 313-759-6569 - 300, 1200, 2400 (V.22bis) or 9600 (USR HST)
--forwarded message--
Date: Tuesday, 27 October 1987 15:08-MST
From: Ray Hirschfeld <RAY at AI.AI.MIT.EDU>
To: W8SDZ
Re: USR Courier HST 9600
Keith:
My latest batch of modems came with a note offering a free upgrade for
data compression if I send in the modem. I called up USR and they say
I can't just have them send chips because they have to replace some
crystals. They charge $50 to upgrade modems with serial numbers less
than 16021.
Here's the first paragraph of the note:
We're improving Courier HST to better serve your data
communication needs. Now you can add data compression (MNP
Service Class 5) for effective speeds up to 17,400 bps. And
automatic data-rate adjustments to 9600-, 7200-, and 4800-bps
transmission speeds keep you online at the fastest speed possible,
even as phone line conditions change during your connection.
Is this the upgrade you got last July? They say it's brand new.
Ray