The 1.2J/H ROM upgrade provides several sophisticated enhancements to your
SupraFAXModem. These instructions explain how to use those enhancements.
RATE RENEGOTIATION
Several commands and S registers combine to provide improved rate
renegotiation on your SupraFAXModem:
%G0 Disable rate renegotiation on V.32bis.
%G1 Enable rate renegotiation on V.32bis, and enable rate
renegotiation with retrain on V.32.
%E Has not changed, but if both %G1 and %E1 are set, then the
modem will renegotiate the rate during a retrain. This is
also the only way the SupraFAXModem V.32 can rate renegotiate.
&F1 Default now includes %G1.
&F2 Default now includes %G1.
S Register S109.
Decimal Value Explanation
1 reserved
2 4800 bps
4 7200 bps
8 9600 bps
16 12000 bps
32 14400 bps
64 reserved
128 reserved
The slowest possible carrier speed can be limited by S109. Some modems
(including SupraFAX-Modem V.32 and V.32bis modems with early ROMs) can only
up-shift a few times, and then they will lose the connection. The solution
to this problem is to change S109 so that the modem does not need to
up-shift as many times if S110=3.
S Register S110.
0 Connect at V.32 only.
1 Enable V.32bis on V.32bis modems.
2 Enable V.32bis and automatic rate renegotiation.
3 Connect at the slowest possible V.32 or V.32bis speed, and then
upshift if quality is good.
The V.32bis standard negotiates carrier speed at 4800 baud, and then jumps to
the agreed carrier speed to negotiate error correction/data compression. On
noisy lines this can cause various con-nection problems. Supra's solution is
to set S110 to 3. This causes the modems to connect at the slowest possible
V.32 or V.32bis speed. With S110=3, as long as the line is clean enough, the
modems will up-shift to the next possible carrier rate. The slowest possible
carrier speed can be set by S109.
COMPATIBILITY WITH A WIDER RANGE OF FAX MACHINES
Rockwell chipset-based modems, including SupraFAXModems with older ROMs,
cannot connect with a select few brands or models of fax machines. To
provide increased compatibility with these fax machines, Supra has modified
the fax tone emitted by the modem, so that the modem can communicate with a
wider range of fax machines. This feature is in effect automatically; you do
not need to do anything to invoke it. However, please note that you may hear
a slight "rattling" noise when dialing out (on fax calls only), which is the
sound of the tone that allows this compatibility.
Silent Answer
Silent answer lets one telephone line be used for two purposes: receiving
faxes with the modem, and receiving voice calls with an answering machine or
telephone. When set to this mode, the modem lets your answering machine
answer all incoming calls. If it detects fax "CNG" tones, it routes the call
to your fax software. Otherwise, it just sits silently on the phone line
while you or your answering machine takes the call.
You must be able to modify your fax software initialization string to take
advantage of this feature. Your software probably does not allow you to
modify the initialization string. Supra is currently working with several
software vendors to add Silent Answer support to their software. To obtain a
version of your software that supports Silent Answer, please contact the
software company.
Once you have software that supports Silent Answer, if your software uses
register S0 to enable Auto Answer, set S0 to a number larger than your
answering machine. This will allow the answering machine to answer first.
When the phone rings, the modem will start monitoring the telephone line
after the second ring. If it detects a fax tone, it will do one of the
following:
If S0 = 0, the modem will immediately answer the phone and attempt a
fax connection.
If S0 = 0, the modem will quickly issue up to 9 "RING" messages,
expecting the fax software to issue an ATA.
When installing the modem, DO NOT plug the answering machine into the
telephone jack on the back of the modem. Instead, do ONE of the following:
Plug the answering machine and modem into different wall jacks (i.e.
jacks in different rooms).
Plug the answering machine into a wall jack and the modem into the
answering machine.
Also, if you have an older answering machine that does NOT automatically turn
itself off when it detects that a person or the modem has answered the call,
you need a $7.95 adapter from Radio Shack, part #43-107. This adapter
disconnects the answering machine from the phone line when the call is
answered. It goes between the answering machine and the wall jack.
Adaptive Answer
Adaptive answer allows the modem to decide if an incoming call is fax or data,
and handle it appropriately. To take advantage of this feature, you must
have a software driver that knows how to switch between fax and data. Your
fax or data software may have this driver built in. The driver must use the
following commands to enable Adaptive Answer:
AT +FCLASS=0
AT +FAA=1 (if using class 2) or +FAE=1 (if using class 1)
S0=(1-255) (or ATA after RING message)
The following result codes can be returned in Adaptive Answer mode:
CONNECT XXXX if the call is a data call, or
FAX if the call is a fax call.
Caller ID
In addition to the features described earlier, Caller ID is available as a
low-cost upgrade option. If your upgrade includes this feature, you will
want to understand the information in this section.
Caller ID is only available in some areas of the country. You can only take
advantage of it if your tele-communications software supports Caller ID. In
between the first and the second ring of an incoming call, the phone company
will send information on who is calling you. For example, if you are in
terminal mode and have told the modem to answer on the third ring, you may
see the following on your screen:
RING
DATE = 0321
TIME = 1405
NMBR = 5039672400
NAME = SUPRA CORPORATION {Optional. Info may vary from one
phone company to another.}
RING
Caller ID can be used by many computer applications for improved security,
efficiency, and convenience. Here are a few of the potential applications:
Bulletin Board Systems (BBSs). A BBS can positively identify callers
without the normal tedious logon sequences, and prevent unauthorized
entry due to lost or stolen accounts and passwords.
Screening Calls. Your computer can display the number and possibly
name of who is calling, so you can decide if you want to answer or
not.
Professional billing. Your computer can match incoming calls to your
client list and automatically create a charge to the client's account
for your phone time.
Database Lookup. Your customer's record or account can be displayed
on your computer screen before you answer the call.
The following AT commands enable and disable Caller ID:
#CID=0 Disables Caller ID
#CID=1 Enables Caller ID in formatted format
#CID=2 Enables Caller ID in unformatted format (ASCII printable hex
numbers)
As with any AT data commands, you can issue these commands from your
telecommunications software terminal mode, or include them in your telecom
software's init string. For example, to enable Caller ID, type the following
in your telecom software's terminal mode, where [CR] represents a carriage
return:
AT #CID=1 [CR]
The SupraFAXModem Reference Manual provides more information on AT commands.
Solving Problems
If you need further assistance after following these instructions, please
contact Supra Technical support.
Supra Corporation Technical Support
(Monday-Friday, 8 a.m.-5 p.m. PST)
IBM DOS 503-967-2490
IBM Windows 503-967-2491
Macintosh 503-967-2492
All Other 503-967-2440
Also available by BBS, fax, or mail at:
BBS 503-967-2444
FAX 503-967-2401
MAIL 7101 Supra Drive SW
Albany, OR 97321 USA
c 1992 Supra Corporation
SupraFAXModem is a trademark of Supra Corporation. Other trademarks belong to their respective owners.
70-0087-R
THIS PART ON BBS:T ON BBS:t be able to modify your fax software initialization string to take advantage of this feature. (Not all software initialization strings can be modified.) Your software may also issue commands you are not aware of, which could interfere with your ability to use this feature. Software is being updated to support Silent Answer; if your software does not support Silent Answer, please contact the software company.
If you can modify your fax software initialization string, use the following fax commands to enable Silent Answer:
AT +FCLASS=0
AT +FAA=2 (if you are using class 2) or AT +FAE=2 (if you are using class 1)
At the time this is being written, Winfaxt software uses Class 2, FAXstft uses Class 1, and FaxTalk Plust either uses Class 1 or lets you choose between Class 1 and Class 2. If you do not know which Class your software uses, please contact the software company.
