From: MsgPost.v1.00@mtask.omahug.org (MsgPost v1.00)
Newsgroups: comp.sys.amiga.hardware
Subject: [2 of 2] Information from Supra on new ROMS
Date: 02 Sep 92 07:59:24 CST
Reply-To: msgpost.v1.00@mtask.omahug.org
Organization: Multitasking Systems, Kansas City
Followup-To: comp.sys.amiga.hardware


        AT +FCLASS=0
        AT +FAA=1 (if using class 2) or +FAE=1 (if using class 1)
        AT S0=(1-255)  or ATA

        Result Codes:  CONNECT XX if data call
        FAX if fax call

        NOTE:  This sequence must be sent before every answer

Implements ECM  (Error Correction Mode)
        Allows the fax software to resend a block of information if it is not
received
correctly by the other modem.  This feature MUST be supported by the fax
software in order to be used.

Implements BFT mode (Binary File Transfer)
        Allows the user to send a file to another fax modem as if it were a
        fax instead of a file.  This feature MUST be supported by the fax
        software in order to be used. This allows the user to use the fax
        software to send the file instead of using a terminal program.

Fixes problem with DCD line turning off if modem configured with &C
        If the modem was configured with the &C, especially during a
        disconnect, the modem would toggle DCD line.  This problem only
        affected a small percentage of users, generally those running BBSes
        on the Apple II.

&Dx and &Cx settings are respected when in fax mode
        The CCITT TR29.2 committee has not defined how the modem should
        react to the &D and &C settings when in class 2 fax mode.  While the
        committee has not defined this, there is a strong sentiment for
        respecting the &D and &C settings as it is handled in class 1 and
        when the modem is in data mode.  This also allows the modems to work
        better under fax mode in the Unix enviorment.

Fixes problem connecting with some fax machines
        The 1.2C roms had a few problems making connections to some fax
        machines.  The fax machine used a slightly different tone when
        answering.  This resulted in the two machines toning back and forth,
        not making a connection and then eventually hang up. This problem
        only happened to a small percentage of users.


Added S-Register S109
        Controls speeds available for V.32bis carrier handshake, or the
        carrier rate to negotiate error correction, if S-Register S110=3.

        Decimal Value   Explanation
                1       reserved
                2       4800 bps
                4       7200 bps
                8       9600 bps
                16      12000 bps
                32      14400 bps
                64      reserved
                128     reserved

Added S-Register S110=3

        V.32bis standard negotiates carrier speed at 4800 baud then jumps to
        the agreed carrier speed to negotiate error correction/data
        compression.  On noisy lines this can cause various connection
        problems.  Supra's solution is to set S-Register S110 to 3.  This
        causes the modems to connect at the slowest possible V.32 or V.32bis
        speed.  Once this is done, 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 limited by the use of
        S-register S109.

NOTE:   Some modems can only up-shift a few times and then they will lose the
        connection  (especially Supra V.32 and V.32bis with ROMs < 1.2C).
        The solution is to change S-Register S109 so that it does not need
        to up-shift as many times.

NOTE:  This only works when the modem is originating the call.

Implements Silent Answer (allows voice/fax determination)
        When the phone rings, the modem will start monitoring the telephone
        line after the 2nd ring.  If it detects a fax tone, it will do one
        of two things:

        1.      If S-Register S0 - 0, the modem will immediately answer the
                phone and attempt a fax connection.

        2.      If S-Register S0 = 0, the modem will quickly issue up to 9
                RINGS messages, expecting the fax software to issue an ATA.

        This eliminates the need for a $150 voice/fax black box.

NOTE:   DO NOT plug the answering machine into the telephone jack on the back

        of the modem.  The modem should be plugged into the answering
machine.
        This also also works if a telephone is in the circuit before the
        faxmodem.

NOTE:   This mode must be supported by the fax software.

Implements Caller ID

        This is a feature is only available in some areas of the country.
        In between the 1st and the 2nd ring, the phone company will send
        information on who is calling you.  If you ere in terminal mode and
        had told the modem to answer on the 3rd ring, you would see:

                RING

                DATE = 0321
                TIME = 1405
                NMBR = 5039672400
                NAME = SUPRA CORPORATION

                RING

                CONNECT 19200

        To enable CALLER ID:

                AT#CID=1        Enables Caller ID in formatted format
                AT#CID=2        Enables Caller ID in unformatted format
                                (ASCII printable hex numbers)
                AT#CID=0        Disables Caller ID


In addition to the enhancements and corrections noted above, Supra's new 1.2G
ROM release also includes modifications that were implemented in the previous
1.2C ROM release.  They are as follows:

%G0     disables Rate Renegotiation on V.32bis

%G1     enables Rate Renegotiation on V.32bis
        enables Rate Renegotiation and Retrain on V.32

%E      has not changed, but if both %G1 and %E1 are set, then the modem will
        Rate Renegotiate during a Retrain.  This is also the only way the
V.32
        modem can Rate Renegotiate.

AT&F1 and AT&F2 defaults now include %G1

S-Register S110:

        0       causes connect at V.32 only
        1       enable V.32bis on V.32bis modems
        2       enable V.32bis and automatic rate renegotiation.


Fixed several problems on the fax side of the modem

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