Chapter 4 - V.22bis Commands
S27 - Bit Mapped Options Status
S27 indicates the status of command options.
Default: 73 (49h) (01001001b)
Bits 0,1,3 Synchronous/asynchronous selection (&Mn/&Qn).
31 0
0 0 0 = &M0 or &Q0.
0 0 1 = &M1 or &Q1.
0 1 0 = &M2 or &Q2.
0 1 1 = &M3 or &Q3.
10 0 = Reserved.
1 0 1 = &Q5. (Default)
11 0 = &Q6.
Bit 2 Leased line control (&Ln). 0 = Dial up line (&L0). (Default)
Bits 4 - 5 Internal clock select (&Xn). 0 = Internal clock (&X0). (Default)
1= External clock (&X1).
2= Slave clock (&X2).
Bit 6
0=
1= Bell mode (B1). (Default) Bit 7 Reserved.
S28 - Bit Mapped Options Status
S28 indicates bit mapped options status.
Default: 0
Bits 0 - 1 Reserved.
Bit 2 Reserved (always 0).
Bits 3 - 4 Pulse dialing (&Pn)
0=
1=
2=
3=
Bit
S29 - Flash Dial Modifier Time
S29 sets the length of time, in units of 10 ms, that the modem will go
Default: 70 (700 ms) for U.S.
S30 - Disconnect Inactivity Timer
S30 sets the length of time, in tens of seconds, that the modem will stay online before disconnecting when no data is sent or received. In
Range:
Default: 0 (disabled)
S31 - Bit Mapped Options Status
S31 indicates bit mapped options status. Default: 192 (C0h) (11000000b)
Bit 0 Single line connect message enable/disable (\Vn).
0 = Messages controlled by S95, Wn and Vn (\V0). (Default) 1 = Single line connect message (\V1).
Bit 1 Reserved (0)
Bits
1= Full reporting (W1).
2= DCE (line) speed only (W2). Bits
0= Caller ID disabled (+VCID=0). (Default)
1= Short (formatted) Caller ID enabled (+VCID=1).
2= Long (unformatted) Caller ID enabled (+VCID=2). Bits
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