SUPRA TECHNICAL SUPPORT BULLETIN
CLASS 1 FAX COMMANDS FOR SUPRA FAXMODEMS
6/19/92
Supra Corporation
7101 Supra Drive SW, Albany, OR 97321
General (503) 967-2400 / Sales (503) 967-2410 / Fax (503) 967-2401
Supra Tech Support (503) 967-2440 8:00am - 5:00pm PST, M-F
Supra BBS........(503) 967-2444 24 Hours
CompuServe.......76004,565
BIX..............SupraCorp
America Online...SupraCorp2
GEnie............SupraTech
AppleLink........D2456
UseNet EMail.....supratech%supra.uucp@cs.orst.edu
.....supra!supratech@cs.orst.edu
SUPRA's DISCLAIMER:
The following information has been taken from Rockwell's RC144AC
manual. It has not been taken from the CCITT Class 1 documentation,
which is copyrighted by the CCITT. This information is provided for
educational purposes only. To fully understand this information
requires a through knowledge of the T.4 fax image and the T.30 fax
session protocol standards. Due to the nature of this information,
Supra's engineers and technical support can not and will not provide any
help or support on this information. We STRONGLY urge anyone attempting
to develop fax software to get the required documentation from Global
Engineering or the TIA.
SHORT HISTORY OF CLASS 1 AND 2
In 1988 the CCITT TR29.2 committee accepted the Class 1 standard for
communication between fax software and fax modems. The committee also
voted on, but did not accept for various technical reasons, the Class 2
standard. A year later, they had slightly revised the standard but
again did not accept it. Software and hardware manufactures decided to
unofficially adopt this standard until the TR29.2 committee could
develop an acceptable standard. Since so many companies have used the
unofficial standard, the TR29.2 committee has designated that when the
standard is officially adopted it will be known as Class 2.0. Over the
last year or so, the TR29.2 committee has voted on several revisions to
the Class 2 standard. Their last vote was early May '92. A no vote for
technical reasons was entered. The TR29.2 committee is now reviewing
the technical issues that were raised. At this time, Supra has not
heard of a projected date for the next ballot.
WHAT IS THE DIFFERENCE BETWEEN CLASS 1 AND 2
Class 1 fax software handles all of the T.4 fax image and T.30 session
protocol information and timing. Thus, the ability to communicate
properly with various fax machines is more a function of the software
than the fax modem. Class 2 fax software generates a T.4 fax page
image and sends it to the fax modem a page at a time. The fax modem
then handles the T.30 session protocol information and timing. This
relieves the computer's cpu from some work. The ability to communicate
properly with various fax machines is more a function of the fax modem
than the software. However, to further complicate matters, class 2 fax
software can issue Class 1 commands and take over some of the duties of
the Class 2 fax modem.
When customers have a problem communicating correctly with a fax
machine/modem, it can be very difficult to determine which is at fault,
the software or the hardware. Supra has collected numerous Class 1 and
2 fax software for a variety of different computers. When we receive a
report of a problem, we use these programs to determine if it is a
software or hardware problem. If it is a hardware problem, we notiftee/hylafax-doc/html/Modems/digicom-scout.html 0000644 0000000 0000000 00000005007 07021605171 023655 0 ustar root root 0000000 0000000
Digicom Scout+
DIGICOM SCOUT+
Manufacturer: Digicom Systems
Model: Scout+
Latest Firmware Revision Tried: 3507/3506
Recommended Firmware Revisions: 2A19/2931
Last Updated: Date: 1998/10/12 20:47:51 $
![o](../icons/info_icon.gif")
- There is online
documentation
and an
FAQ for Digicom modems.
CLASS 1 SUPPORT
- AT+FMFR?,
AT+FMDL?,
and
AT+FREV? all return "3" in some versions of firmware
(where vestiges of Class 2 support were present)
- ATS17=2 can be used to force 1300 Hz CNG tones to be sent (the
register is not documented)
-
RTS/CTS is not honored while sending page data; software flow
control must be used (AT*F2).
This is fixed in rev 3507/3506 firmware
by adding a register S24 that can be used to control flow control
in facsimile mode:
- 0 means use XON/XOFF,
- 1 means use RTS/CTS, and
- 2 means use whatever is specified by AT*F.
Note however that S24
is not permanent; it is reset after each disconnect. On power on
S24 is 0. S24 is unchanged by AT&F.
- Receiving at 4800 baud v.27 does not work correctly; received
data is garbage
(fixed in firmware revision 3225/3310).
- Commands must not be sent to the modem too fast, no more than
every 50ms (or more) depending on what the modem is doing.
- The modem gets confused by receivers that assert a data
carrier before sending CED; a +FCERROR result is returned before
usually returning "NO CARRIER"; this can sometimes be overcome
by sending 1300 Hz CNG tones instead of the normal 1100 Hz tones.
Modem Index
Everex 24/96D
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:33 $.
./usr/share/doc/hylafax-doc/html/Modems/usr-sportster.html 0000644 0000000 0000000 00000004133 07021605172 023763 0 ustar root root 0000000 0000000
US Robotics Sportster
US ROBOTICS SPORTSTER
Manufacturer: U.S. Robotics
Model: Sportster
Latest Firmware Revision Tried:
Supervisor 4.1 (04/22/93)/DSP 10 (03/23/93)
Recommended Firmware Revisions:
Supervisor 4.1 (04/22/93)/DSP 10 (03/23/93)
Last Updated: Date: 1998/10/12 20:47:51 $
- Firmware revisions numbers appear to be meaningless; only the data stamps are useful.
-
- Newer v.34 models include Class 2.0 fax support.
CLASS 1 SUPPORT
- Timing problems have been observed with older firmware revisions;
if you have problems, be sure to verify the firmware revision.
- When sending DCD is raised when carrier is first received, but it is
then dropped from the first HDLC receive until the point where the
initial training is sent (from that point on DCD is asserted); this
can be a problem because there is no way to override this behaviour
which means that the host must be capable of ignoring DCD for sending
to function correctly
- In testing the modem locked up during transmission to a Multi-Tech 1432BA
modem and failed to respond to the host dropping DTR
CLASS 2.0 SUPPORT
- No information available.
Modem Index
ZyXEL U-1496
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:34 $.
./usr/share/doc/hylafax-doc/html/Modems/multitech-1432.html 0000644 0000000 0000000 00000003610 07021605130 023465 0 ustar root root 0000000 0000000
Multi-Tech MT1432BA
MULTI-TECH MT1432BA
Manufacturer: Multi-Tech Systems
Model: MT1432BA
Latest Firmware Revision Tried: 1.16b
Recommended Firmware Revisions: 1.16b and later
Last Updated:$Date: 1999/12/03 00:10:00 $
-
- There are several
different models,
of the MT1432, all of which function well.
Models based on the AT&T datapump have firmware revisions numbered
``01xx'', while older models based on the Rockwell datapump
have firmware revisions numbered ``03xx''.
- This modem is recommended for use with HylaFAX.
CLASS 2 SUPPORT
Modem Index
Multitech 1932ZDX
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:00 $.
./usr/share/doc/hylafax-doc/html/Modems/hayes-optima2400.html 0000644 0000000 0000000 00000003752 07021605171 024022 0 ustar root root 0000000 0000000
Hayes Optima 2400+Fax96
HAYES OPTIMA 2400+FAX96
Manufacturer: Hayes
Model: Optima 2400+Fax96
Latest Firmware Revision Tried: TR00-J260-001 XXX
Recommended Firmware Revisions: N/A
Last Updated: Date: 1998/10/12 20:47:51 $
-
- Technical reference information
for Hayes modem users is available.
CLASS 1 SUPPORT
- Receiving is unreliable; I was never able to get the receipt
of TCF to work correctly in the short time that I had the modem
(no data was delivered after establishing carrier before timeout).
CLASS 2 SUPPORT
- Many commands (e.g. ATZ) generate annoying clicks & pops from
the speaker
- Using '@' in the dialing string causes the modem to return
"NO ANSWER" when calling many modems
- The modem does not do a good job of reliably holding high speed
carrier--when sending and receiving, data is frequently corrupted
at both 9600 and 7200 baud (the phone line did not appear
to be the reason as other modems worked fine in back-to-back
testing)
Modem Index
Multi-Tech MT1432BA
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:33 $.
./usr/share/doc/hylafax-doc/html/Modems/Supra/ 0000755 0000000 0000000 00000000000 10170662633 021316 5 ustar root root 0000000 0000000 ./usr/share/doc/hylafax-doc/html/Modems/Supra/class1.html 0000644 0000000 0000000 00000104740 06610465367 023411 0 ustar root root 0000000 0000000
CLASS 1 FAX COMMANDS FOR SUPRA FAXMODEMS
SUPRA TECHNICAL SUPPORT BULLETIN
CLASS 1 FAX COMMANDS FOR SUPRA FAXMODEMS
6/19/92
Supra Corporation
7101 Supra Drive SW, Albany, OR 97321
General (503) 967-2400 / Sales (503) 967-2410 / Fax (503) 967-2401
Supra Tech Support (503) 967-2440 8:00am - 5:00pm PST, M-F
Supra BBS........(503) 967-2444 24 Hours
CompuServe.......76004,565
BIX..............SupraCorp
America Online...SupraCorp2
GEnie............SupraTech
AppleLink........D2456
UseNet EMail.....supratech%supra.uucp@cs.orst.edu
.....supra!supratech@cs.orst.edu
SUPRA's DISCLAIMER:
The following information has been taken from Rockwell's RC144AC
manual. It has not been taken from the CCITT Class 1 documentation,
which is copyrighted by the CCITT. This information is provided for
educational purposes only. To fully understand this information
requires a through knowledge of the T.4 fax image and the T.30 fax
session protocol standards. Due to the nature of this information,
Supra's engineers and technical support can not and will not provide any
help or support on this information. We STRONGLY urge anyone attempting
to develop fax software to get the required documentation from Global
Engineering or the TIA.
SHORT HISTORY OF CLASS 1 AND 2
In 1988 the CCITT TR29.2 committee accepted the Class 1 standard for
communication between fax software and fax modems. The committee also
voted on, but did not accept for various technical reasons, the Class 2
standard. A year later, they had slightly revised the standard but
again did not accept it. Software and hardware manufactures decided to
unofficially adopt this standard until the TR29.2 committee could
develop an acceptable standard. Since so many companies have used the
unofficial standard, the TR29.2 committee has designated that when the
standard is officially adopted it will be known as Class 2.0. Over the
last year or so, the TR29.2 committee has voted on several revisions to
the Class 2 standard. Their last vote was early May '92. A no vote for
technical reasons was entered. The TR29.2 committee is now reviewing
the technical issues that were raised. At this time, Supra has not
heard of a projected date for the next ballot.
WHAT IS THE DIFFERENCE BETWEEN CLASS 1 AND 2
Class 1 fax software handles all of the T.4 fax image and T.30 session
protocol information and timing. Thus, the ability to communicate
properly with various fax machines is more a function of the software
than the fax modem. Class 2 fax software generates a T.4 fax page
image and sends it to the fax modem a page at a time. The fax modem
then handles the T.30 session protocol information and timing. This
relieves the computer's cpu from some work. The ability to communicate
properly with various fax machines is more a function of the fax modem
than the software. However, to further complicate matters, class 2 fax
software can issue Class 1 commands and take over some of the duties of
the Class 2 fax modem.
When customers have a problem communicating correctly with a fax
machine/modem, it can be very difficult to determine which is at fault,
the software or the hardware. Supra has collected numerous Class 1 and
2 fax software for a variety of different computers. When we receive a
report of a problem, we use these programs to determine if it is a
software or hardware problem. If it is a hardware problem, we notiftee/hylafax-doc/html/Modems/digicom-scout.html 0000644 0000000 0000000 00000005007 07021605171 023655 0 ustar root root 0000000 0000000
Digicom Scout+
DIGICOM SCOUT+
Manufacturer: Digicom Systems
Model: Scout+
Latest Firmware Revision Tried: 3507/3506
Recommended Firmware Revisions: 2A19/2931
Last Updated: Date: 1998/10/12 20:47:51 $
-
- There is online
documentation
and an
FAQ for Digicom modems.
CLASS 1 SUPPORT
- AT+FMFR?,
AT+FMDL?,
and
AT+FREV? all return "3" in some versions of firmware
(where vestiges of Class 2 support were present)
- ATS17=2 can be used to force 1300 Hz CNG tones to be sent (the
register is not documented)
-
RTS/CTS is not honored while sending page data; software flow
control must be used (AT*F2).
This is fixed in rev 3507/3506 firmware
by adding a register S24 that can be used to control flow control
in facsimile mode:
- 0 means use XON/XOFF,
- 1 means use RTS/CTS, and
- 2 means use whatever is specified by AT*F.
Note however that S24
is not permanent; it is reset after each disconnect. On power on
S24 is 0. S24 is unchanged by AT&F.
- Receiving at 4800 baud v.27 does not work correctly; received
data is garbage
(fixed in firmware revision 3225/3310).
- Commands must not be sent to the modem too fast, no more than
every 50ms (or more) depending on what the modem is doing.
- The modem gets confused by receivers that assert a data
carrier before sending CED; a +FCERROR result is returned before
usually returning "NO CARRIER"; this can sometimes be overcome
by sending 1300 Hz CNG tones instead of the normal 1100 Hz tones.
Modem Index
Everex 24/96D
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:33 $.
./usr/share/doc/hylafax-doc/html/Modems/usr-sportster.html 0000644 0000000 0000000 00000004133 07021605172 023763 0 ustar root root 0000000 0000000
US Robotics Sportster
US ROBOTICS SPORTSTER
Manufacturer: U.S. Robotics
Model: Sportster
Latest Firmware Revision Tried:
Supervisor 4.1 (04/22/93)/DSP 10 (03/23/93)
Recommended Firmware Revisions:
Supervisor 4.1 (04/22/93)/DSP 10 (03/23/93)
Last Updated: Date: 1998/10/12 20:47:51 $
-
- Firmware revisions numbers appear to be meaningless; only the data stamps are useful.
-
- Newer v.34 models include Class 2.0 fax support.
CLASS 1 SUPPORT
- Timing problems have been observed with older firmware revisions;
if you have problems, be sure to verify the firmware revision.
- When sending DCD is raised when carrier is first received, but it is
then dropped from the first HDLC receive until the point where the
initial training is sent (from that point on DCD is asserted); this
can be a problem because there is no way to override this behaviour
which means that the host must be capable of ignoring DCD for sending
to function correctly
- In testing the modem locked up during transmission to a Multi-Tech 1432BA
modem and failed to respond to the host dropping DTR
CLASS 2.0 SUPPORT
- No information available.
Modem Index
ZyXEL U-1496
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:34 $.
./usr/share/doc/hylafax-doc/html/Modems/multitech-1432.html 0000644 0000000 0000000 00000003610 07021605130 023465 0 ustar root root 0000000 0000000
Multi-Tech MT1432BA
MULTI-TECH MT1432BA
Manufacturer: Multi-Tech Systems
Model: MT1432BA
Latest Firmware Revision Tried: 1.16b
Recommended Firmware Revisions: 1.16b and later
Last Updated:$Date: 1999/12/03 00:10:00 $
-
- There are several
different models,
of the MT1432, all of which function well.
Models based on the AT&T datapump have firmware revisions numbered
``01xx'', while older models based on the Rockwell datapump
have firmware revisions numbered ``03xx''.
-
- This modem is recommended for use with HylaFAX.
CLASS 2 SUPPORT
Modem Index
Multitech 1932ZDX
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:00 $.
./usr/share/doc/hylafax-doc/html/Modems/hayes-optima2400.html 0000644 0000000 0000000 00000003752 07021605171 024022 0 ustar root root 0000000 0000000
Hayes Optima 2400+Fax96
HAYES OPTIMA 2400+FAX96
Manufacturer: Hayes
Model: Optima 2400+Fax96
Latest Firmware Revision Tried: TR00-J260-001 XXX
Recommended Firmware Revisions: N/A
Last Updated: Date: 1998/10/12 20:47:51 $
-
- Technical reference information
for Hayes modem users is available.
CLASS 1 SUPPORT
- Receiving is unreliable; I was never able to get the receipt
of TCF to work correctly in the short time that I had the modem
(no data was delivered after establishing carrier before timeout).
CLASS 2 SUPPORT
- Many commands (e.g. ATZ) generate annoying clicks & pops from
the speaker
- Using '@' in the dialing string causes the modem to return
"NO ANSWER" when calling many modems
- The modem does not do a good job of reliably holding high speed
carrier--when sending and receiving, data is frequently corrupted
at both 9600 and 7200 baud (the phone line did not appear
to be the reason as other modems worked fine in back-to-back
testing)
Modem Index
Multi-Tech MT1432BA
webmaster@hylafax.org.
Last updated $Date: 1999/12/03 00:10:33 $.
./usr/share/doc/hylafax-doc/html/Modems/Supra/ 0000755 0000000 0000000 00000000000 10170662633 021316 5 ustar root root 0000000 0000000 ./usr/share/doc/hylafax-doc/html/Modems/Supra/class1.html 0000644 0000000 0000000 00000104740 06610465367 023411 0 ustar root root 0000000 0000000
CLASS 1 FAX COMMANDS FOR SUPRA FAXMODEMS
SUPRA TECHNICAL SUPPORT BULLETIN
CLASS 1 FAX COMMANDS FOR SUPRA FAXMODEMS
6/19/92
Supra Corporation
7101 Supra Drive SW, Albany, OR 97321
General (503) 967-2400 / Sales (503) 967-2410 / Fax (503) 967-2401
Supra Tech Support (503) 967-2440 8:00am - 5:00pm PST, M-F
Supra BBS........(503) 967-2444 24 Hours
CompuServe.......76004,565
BIX..............SupraCorp
America Online...SupraCorp2
GEnie............SupraTech
AppleLink........D2456
UseNet EMail.....supratech%supra.uucp@cs.orst.edu
.....supra!supratech@cs.orst.edu
SUPRA's DISCLAIMER:
The following information has been taken from Rockwell's RC144AC
manual. It has not been taken from the CCITT Class 1 documentation,
which is copyrighted by the CCITT. This information is provided for
educational purposes only. To fully understand this information
requires a through knowledge of the T.4 fax image and the T.30 fax
session protocol standards. Due to the nature of this information,
Supra's engineers and technical support can not and will not provide any
help or support on this information. We STRONGLY urge anyone attempting
to develop fax software to get the required documentation from Global
Engineering or the TIA.
SHORT HISTORY OF CLASS 1 AND 2
In 1988 the CCITT TR29.2 committee accepted the Class 1 standard for
communication between fax software and fax modems. The committee also
voted on, but did not accept for various technical reasons, the Class 2
standard. A year later, they had slightly revised the standard but
again did not accept it. Software and hardware manufactures decided to
unofficially adopt this standard until the TR29.2 committee could
develop an acceptable standard. Since so many companies have used the
unofficial standard, the TR29.2 committee has designated that when the
standard is officially adopted it will be known as Class 2.0. Over the
last year or so, the TR29.2 committee has voted on several revisions to
the Class 2 standard. Their last vote was early May '92. A no vote for
technical reasons was entered. The TR29.2 committee is now reviewing
the technical issues that were raised. At this time, Supra has not
heard of a projected date for the next ballot.
WHAT IS THE DIFFERENCE BETWEEN CLASS 1 AND 2
Class 1 fax software handles all of the T.4 fax image and T.30 session
protocol information