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2400BPS MODEM (0302AMC)
UNIDENTIFIED
2400BPS MODEM (0302AMC)
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Card Type
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Modem (asynchronous)
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Chip Set
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Unidentified
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Maximum Data Rate
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2400bps
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Data Bus
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8-bit ISA
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Data Modulation Protocol
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Bell 103A/212A
ITU-T V.22, V.22bis
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Error Correction/Compression
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MNP5, V.42, V.42bis
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CONNECTIONS
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Function
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Label
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Function
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Label
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Line out
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CN1
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Line in
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CN2
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SERIAL PORT ADDRESS
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Setting
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JP1/A
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JP1/B
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JP1/C
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JP1/D
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COM1 (3F8h)
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Closed
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Open
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Closed
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Open
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COM2 (2F8h)
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Closed
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Open
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Open
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Closed
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COM3 (3E8h)
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Open
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Closed
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Closed
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Open
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COM4 (2E8h)
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Open
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Closed
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Open
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Closed
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INTERRUPT
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Setting
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JP1/E
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JP1/F
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JP1/G
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JP1/H
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2
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Open
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Open
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Open
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Closed
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3
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Open
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Closed
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Open
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Open
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4
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Closed
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Open
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Open
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Open
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5
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Open
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Open
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Closed
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Open
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WAIT STATE
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Setting
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JP1/I
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JP1/J
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0
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Closed
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Open
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1
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Open
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Closed
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Proprietary AT Command Set
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BIT MAPPED REGISTERS
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Register
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Default
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S14
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170
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S21
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0
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S22
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118
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S23
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7
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S27
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64
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S28
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0
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DTMF ATTENUATION
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Type:
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Configuration
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Format:
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AT [cmds] %Dn [cmds]
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Default:
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0
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Range:
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1-7
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Unit:
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2 dBm
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Description:
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Controls DTMF attenuation
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SECONDARY DEFAULTS
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Type:
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Immediate
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Format:
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AT [cmds] %J [cmds]
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Description:
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Sets all S registers and AT commands to AT&F default except; S6=3s, range 3-255; S11=95ms, range 60-255; %L3, 6dBm; %D1, 2dBm.
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TEST MODES
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Format
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AT [cmds] S16=n [cmds]
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Default:
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0
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Range:
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0-125
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Unit:
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Bit-mapped
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Description:
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Controls loopback tests, analog, digital, remote digital, and self tests.
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Bit
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Value
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Function
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0
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í 0
1
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Local analog loopback not in progress
Local analog loopback in progress
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1
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í 0
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Not used
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2
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í 0
1
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Local digital loopback not in progress
Local digital loopback in progress
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3
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í 0
1
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Modem not in remote digital loopback
Remote digital loopback in progress
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4
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í 0
1
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Remote digital loopback not in progress
Remote digital loopback in progress
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5
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í 0
1
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Remote digital loopback w/ self-test not in progress
Remote digital loopback w/ self-test in progress
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6
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í 0
1
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Local analog loopback w/ self-test not in progress
Local analog loopback w/ self-test in progress
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TRANSMIT ATTENUATION
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Type:
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Configuration
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Format:
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AT [cmds] %Ln [cmds]
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Default:
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0
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Range:
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1-7
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Unit:
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2 dBm
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Description:
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Controls transmit attenuation
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