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Micro House PC Hardware Library Volume II: Network Interface Cards And Modems Micro House PC Hardware Library Volume II: Network Interface Cards And Modems
by Micro House International, Inc. and Scott Mueller
Que, Macmillan Computer Publishing
ISBN: 078971664x   Pub Date: 06/17/98
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DISTINCTIVE RING
Type: Configuration
Format: AT [cmds] $$Rn [cmds]
Description: Selects whether the modem will use the Distinctive Ring function.
Command Function
$$R0Distinctive Ring disabled.
     $$R2 Distinctive Ring enabled.

DISTINCTIVE RING TYPES
Format: AT [cmds] -SDR=n [cmds]
Default: Unidentified
Range: 0 - 7
Description: Selects which distinctive ring signals the modem will respond to.
Bit Value Function
0 0 Do not respond to distinctive ring type 1.
1 Respond to distinctive ring type 1.
1 0 Do not respond to distinctive ring type 2.
1 Respond to distinctive ring type 2.
2 0 Do not respond to distinctive ring type 3.
1 Respond to distinctive ring type 3.

LINE SPEED
Type: Register
Format: AT [cmds] S37=n [cmds]
Description: Sets the maximum allowable data exchange rate attempted during the handshaking process.
Command Function
S37=0Attempt to connect at fastest common speed.
     S37=1 Set speed to 300bps.
     S37=2 Set speed to 300bps.
     S37=3 Set speed to 300bps.
     S37=5 Set speed to 1200bps.
     S37=6 Set speed to 2400bps.
     S37=7 Attempt to connect with V.23.
     S37=8 Set speed to 4800bps.
     S37=9 Set speed to 9600bps.
     S37=10 Set speed to 12Kbps.
     S37=11 Set speed to 14.4Kbps.
     S37=12 Set speed to 7200bps.

MODE SELECTION
Type: Immediate
Format: AT [cmds] #CLS=n [cmds]
Description: Selects which mode the modem will operate in.
Command Function
#CLS=0 Modem will operate in data mode.
#CLS=1 Modem will operate in fax class 1 mode.
#CLS=8 Modem will operate in voice mode.

MNP10EC MODE
Type: Configuration
Format: AT [cmds] -SEC=n [cmds]
Description: Selects whether the modem will attempt to use MNP10EC mode during the handshaking sequence.
Command Function
     -SEC=0 MNP10EC handshaking disabled unless a V.34 connection is attempted via a cellular line.
-SEC=1MNP10EC handshaking enabled.

SPEAKERPHONE OPTIONS
Type: Configuration
Format: AT [cmds] #SPK=x,y,z [cmds]
Description: Sets various options for speakerphone functions.
Command Function
x=0 Microphone enabled.
x=1 Microphone disabled.
x=2 Microphone enabled with maximum gain, speaker disabled.
y Default: 5
Range: 0 - 16
Unit: -2 dBm
Description: Sets the attenuation level for speaker output in voice mode. A value of 16 will mute the speaker.
z=0 Microphone gain set to 0 dBm.
z=1 Microphone gain set to 6 dBm.
z=2 Microphone gain set to 9.5 dBm.
z=3 Microphone gain set to 12 dBm.

SVD OPTIONS
Type: Configuration
Format: AT [cmds] $$ASn =xx [cmds]
Description: Selects whether the modem will use SVD mode and selects the line source for it.
Command Function
$$ASn =OFF SVD enabled
$$ASn =ON SVD disabled.
     n=1 Telephone handset used for voice I/O with high data throughput.
     n=2 Telephone handset used for voice I/O with high voice throughput.
     n=3 Telephone line used for voice I/O with high data throughput.
     n=4 Telephone line used for voice I/O with high voice throughput.
n=5 Speakerphone used for voice I/O with high data throughput.
     n=6 Speakerphone used for voice I/O with high voice throughput.


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