Fax Modem  (250-3581)         Specifications         Faxback Doc. # 5888

OPERATION MODES:

CCITT V.22bis, V.22, V.23 and V.21
Bell 212A and 103
CCITT V.29, V.27ter, and V.21 channel 2

True FAX send and receive facsimile to 9600 bps

Error correction (V.42 LAPM and MNP 2, 3 ,4, 10)

Data Compression (V.42. bis and MNP 5)

Communication software compatible command sets

Enhanced "AT" command set.
FAX class 1 commands
FAX class 2 commands (proposed EIA/TIA 592).

Line quality receive level monitoring.

Programmable speaker volume control.

NVRAM directory stored profiles.

Flow control (XON/OFF, RTS/CTS).

Automatic format/speed sensing from 300 bps to 19,200 bps.

OPTIONS

Diagnostics

Remote digital loop and remote digital loop self test.

Analog loop and analog loop self test

Digital loop test

Power-on self test.

Auto retrain.

ASYNCHRONOUS
DATA FORMAT   1 start bit  7 data bits   even or odd parity    1 stop bit
              1 start bit  7 data bits   no parity             2 stop bits
              1 start bit  7 data bits   mark or space parity  1 stop bit
              1 start bit  8 data bits   no parity             1 stop bit

DIALING CAPABILITY:............Touch-Tone and rotary-dial pulse dialing.

COMMAND BUFFER:...........................................40 characters.

OPERATION:..........................................Full-or half-duplex.
DATA RATE:.................................Up to 300, 1200, 0r 2400 bps.

INTERFACE:......................................................RS-232-C

DATA MODE:....................Compatible with Bell System 103 or 300 bps
                              Compatibility asynchronous modems Bell
                              212A 1200 bps asynchronous modems CCITT
                              Recommendation V.22 1200 bps asynchronous
                              modems.  CCITT v.22 bis 2400 bps
                              asynchronous modems.

RECEIVE SENSITIVITY:............................................-43dBm.

TRANSMIT LEVEL:.................................................-12dBm.

REGISTRATION:......................FCC-registered for direct connection
                                   to the nationwide telephone system.
                                   Connects with the following modular
                                   jacks:  RJ11C

SCRAMBLE POLYNOMIAL:..................................X=1 + X-14 x X-17

TEST AND DIAGNOSTICS FACILITIES:..............Local Analog Loopback L3.
                                Local Analog Loopback L3 with Self-Test.
                                                 Local Digital Loopback.
                                          Remote Digital Loopback L2.
      Remote Digital Loopback L2 with Self-Test Programmable test-timer.

RESPONSES SUPPORTED:                     DTMF TONE SYMBOLS:

OK            0                           1
CONNECT       1                           2
RING          2                           3
NO CARRIER    3                           4
ERROR         4                           5
CONNECT 1200  5                           6
NO DIALTONE   6                           7
BUSY          7                           8
NO ANSEWR     8                           9
CONNECT 2400  10                          #
                                          0
                                          *
                                          A
                                          B
                                          C
                                          D

TRANSMITTER
SIGNALING
FREQUENCIES:

                     V.22 bis low-channel originate mode  1200 +/- .01%
                     V.22 low-channel originate mode      1200 +/- .01%
                     V.22 bis high-channel answer mode    2400 +/- .01%
                     V.22 high-channel answer mode        2400 +/- .01%
                     Bell 212A high-channel answer mode   2400 +/- .01%
                     Bell 212A low-channel originate mode 1200 +/- .01%
                     Bell 103 originate mark              1270 +/- .01%
                     Bell 103 originate space             1070 +/- .01%
                     Bell 103 answer mark                 2225 +/- .01%
                     Bell 103 answer space                2025 +/- .01%

(SMC/all-06/06/94)