Date: Sun, 26 Jul 92 14:01:38 PDT
From: sp@questor.wimsey.bc.ca (Steve Pershing)
Newsgroups: comp.dcom.telecom
Subject: Caller-ID, FAX, Soon VoiceMail in a Modem
Organization: Questor|Free Usenet News|Vancouver, BC: +1 604 681 0670
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 588, Message 3 of 5

I have in front of me a ZyXEL U-1496S modem.  This is the sort of
state-of-the-art-modem I would have had my group design were I still
working in modem research at Gandalf Data.

It has a two line by 20 character LCD display, menu-tree programming
from the screen via four pushbuttons, and implements a whole bunch of
CCITT protocols up to 14,400 v.32bis/v.42.bis, and v.17 FAX. Needless
to say, it does both sync and async, and even has modes for use with
cellular and satellite.

(Presently, the operation modes are: v.33; v.32bis; v.32; v.29;
v.27ter; v.22bis; v.22; BELL 212A; G3 FAX according to T30, v.17, v.29
and v.27ter; and most variants.)

What does the display do besides allow you to program all the
registers?  Well, you can not only see the incoming connect speed, but
also things like:

        - Signal-to-noise ratio
        - Received Carrier Power Level
        - Phase Jitter (p-p degrees with .1 deg resolution)
        - Frequency offset between TX and RX freqs (in .1 Hz res)
        - Round-trip echo delay in (1/2400 sec)

          ... and a whole lot more.

After your communication session has finished, you can even call up
(by an AT-command) a "Link Status Report" which will give you:

        - Chars sent; Chars rcvd; Octets sent; Octets Rcvd
        - Blocks sent; Blocks rcvd; Blocks re-sent;
        - Max Outstanding; Max Block Size;
        - Retrain requests; Retrains granted; Link duration;
        - T401 timeouts; T402 Timeouts; FCS Errors;
        - Round-trip delay; Xmtr under-run; Rcvr Over-run
        - Reason for disconnect.

With the latest ROM revisions, it handles Caller ID, 4 different
ringing codes, and the maximum speed is 16,800 baud.  (They are
working, I believe on 19,200 baud, as well as VoiceMail.)

Finally, for the technically minded, it can even be supplied with X-
and Y-axis outputs for a scope, so that you can see "eye" or
"constellation" diagrams.

There are three telephone receptacles for telco line connexions: One
for a local phone; one for 2/4-wire leased-line, and one for 2-wire
dial-up line.  (The dial-up line even supports telco 1A-key system A-
leads for lamp status control.)

Lots of features have been left out of this little blurb to try to
keep it as reasonably short as I can.

Upgrades?  Well, they are via a couple of 27C010-15 (1Mb) ROMs, and
the binaries are usually posted on their BBS, or available via FTP or
mail- server from various sources (including here).  So, if you have
access to a ROM-burner, you can do the upgrades yourself.

Just had to let you know about this great little modem, in case you
hadn't already heard.

Anyhow, having said all of that, you can get most info (including
TIFF- image files at 300dpi) from my mail-server.  To save space, the
files have been compressed with ZOO, which is available for most O/S
from DOS to UNIX.  (ZOO version 2.10 for DOS and for UNIX is available
via mail- server from this site.)

To get started, send e-mail to:

        mail-server@questor.wimsey.bc.ca

and in the body of the text, enter the following at the left margin,
with nothing else in the body:

HELP
INFO
INFO INDEX
INFO FILINDX

Warm regards to all.


Steve Pershing, System Administrator, The QUESTOR Project
POST: 1027 Davie St., Box 486, Vancouver, B.C., Canada  V6E 4L2
Fones: (+1 604)  Data: 681-0670  FAX: 682-6160  Voice: 682-6659