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DS56-L145-061

SmartSCM Modem

Conexant Systems 

SmartSCM Modem Data Sheet

2 TECHNICAL SPECIFICATIONS

2.1 Serial DTE Interface Operation

2.1.1 Automatic Speed/Format Sensing

Command Mode and Data Modem Mode. The modem can automatically determine the speed and format of the data sent

from the DTE. The modem can sense speeds of 300, 600, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200,

21600, 24000, 26400, 28800, 38400, 57600, 115200, and 230400 bps and the following data formats:

Parity

Data Length

(No. of Bits)

No. of

Stop Bits

Character Length

(No. of Bits)

None

7

2

10

Odd

7

1

10

Even

7

1

10

None

8

1

10

Odd

8

1

11*

Even

8

1

11*

*11-bit characters are sensed, but the parity bits are stripped off

during data transmission in Normal and Error Correction modes.

The modem can speed sense data with mark or space parity and configures itself as follows:

DTE Configuration

7 mark

7 space

8 mark

8 space

Modem Configuration

7 none

8 none

8 none

8 even

Fax Modem Mode. In V.17 fax mode, the modem can sense speeds up to 230.4 kbps.

2.2 Parallel Host Bus Interface Operation

Command Mode and Data Modem Mode. The modem can operate at rates up to 230.4 kbps by programming the Divisor

Latch in the parallel interface registers if supported by communications software and/or driver (a Windows 95/98 driver is

available from Conexant).

Fax Modem Mode. In V.17 mode, the modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the

parallel interface registers if supported by communications software and/or driver (a Windows 95/98 driver is available from

Conexant).

2.3 Establishing Data Modem Connections

Telephone Number Directory

The modem supports four telephone number entries in a directory that can be saved in a serial NVRAM. Each telephone

number can be up to 32 characters (including the command line terminating carriage return) in length. A telephone number

can be saved using the &Zn=x command, and a saved telephone number can be dialed using the DS=n command.

Dialing

DTMF Dialing. DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T Q.23. The transmit tone level

complies with Bell Publication 47001.

Pulse Dialing. Pulse dialing is supported in accordance with EIA/TIA-496-A.

Blind Dialing. The modem can blind dial in the absence of a dial tone if enabled by the X0, X1, or X3 command.

100490C

Conexant

2-1

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