Information Technology Reference
In-Depth Information
Bit 5, 4, 3 = 011 \K3
Bit 5, 4, 3 = 100 \K4
Bit 5, 4, 3 = 101
\K5
Bit 7, 6 = 00 MNP 64 character block size (\A0)
Bit 7, 6 = 01
MNP 128 character block size (\A1)
Bit 7, 6 = 10 MNP 192 character block size (\A2)
Bit 7, 6 = 11 MNP 256 character block size (\A3)
Table C.2
Modem registers
Register
Function
Range [typical default]
S0
Rings to Auto-answer
0-255 rings [0 rings]
S1
Ring counter
0-255 rings [0 rings]
S2
Escape character
[43]
S3
Carriage return character
[13]
S6
Wait time for dial-tone
2-255 s [2 s]
S7
Wait time for carrier
1-255 s [50 s]
S8
Pause time for automatic dialing
0-255 s [2 s]
S9
Carrier detect response time
1-255 in 0.1 s units [6]
S10
Carrier loss disconnection time
1-255 in 0.1 s units [14]
S11
DTMF tone duration
50-255 in 0.001 s units [95]
S12
Escape code guard time
0-255 in 0.02 s units [50]
S13
Reserved
S14
General bitmapped options
[8Ah (1000 1010b)]
S15
Reserved
S16
Test mode bitmapped options (&T)
[0]
S17
Reserved
S18
Test timer
0-255 s [0]
S19-S20
Reserved
S21
V.24/General bitmapped options
[04h (0000 0100b)]
S22
Speak/results bitmapped options
[75h (0111 0101b)]
S23
General bitmapped options
[37h (0011 0111b)]
S24
Sleep activity timer
0-255 s [0]
S25
Delay to DSR off
0-255 s [5]
S26
RTS-CTS delay
0-255 in 0.01 s [1]
S27
General bitmapped options
[49h (0100 1001b)]
S28
General bitmapped options
[00h]
S29
Flash dial modifier time
0-255 in 10 ms [0]
S30
Disconnect inactivity timer
0-255 in 10 s [0]
S31
General bitmapped options
[02h (0000 0010b)]
S32
XON character
[Cntrl-Q, 11h (0001 0001b)]
S33
XOFF character
[Cntrl-S, 13h (0001 0011b)]
S34-S35
Reserved
S36
LAMP failure control
[7]
S37
Line connection speed
[0]
S38
Delay before forced hang-up
0-255 s [20]
S39
Flow control
[3]
S40
General bitmapped options
[69h (0110 1001b)]
S41
General bitmapped options
[3]
S42-S45
Reserved
S46
Data compression control
[8Ah (1000 1010b)]
S48
V.42 negotiation control
[07h (0000 0111b)]
S80
Soft-switch functions
[0]
S82
LAPM break control
[40h (0100 0000b)]
S86
Call failure reason code
0-255
S91
PSTN transmit attenuation level
0-15 dBm [10]
S92
Fax transmit attenuation level
0-15 dBm [10]
S95
Result code message control
[0]
S99
Leased line transmit level
0-15 dBm [10]
