23
before &Q4 is issued.
Default:
0
Bit0 :
Reserved
Bit1 :
BSC/HDLC Format Select
0 = BSC selected (Default)
1 = HDLC selected
Bit2 :
Address detection enable/disable
0 = Disabled (Default)
1 = Enabled
Bit3 :
NRZI/NRZ coding select
0 = NRZI (Default)
1 = NRZ
Bit4 :
Idle indicator select
0 = Mark idle (Default)
1 = Flag of sync idle
Bits5-7 :
Reserved
S20 - AutoSync HDLC Address or BSC Sync Character
Defines the HDLC address (S19 bit 1 = 1) or BSC Sync Character (S19 bit 1 = 0) for Auto Sync operation
(see &Q4 command).
Range:
0-255
Default:
0
S21 - V.24/General Bit Mapped Options Status
Indicates the status of command options.
Default:
4
Bit0 :
Set by &Jn command but ignored otherwise.
0 = &J0 (Default)
1 = &J1
Bit1 :
Reserved
Bit2 :
CTS behavior (&Rn)
0 = CTS tracks RTS (&R0)
1 = CTS always on (&R1) (Default)
Bits3-4 :
DTR behavior (&Dn)
0 = &D0 selected (Default)
1 = &D1 selected
2 = &D2 selected
3 = &D3 selected
BIT5 :
RLSD(DCD) behavior (&Cn)
0 = &C0 selected (Default)
1 = &C1 selected
Bit6 :
DSR behavior (&Sn)
0 = &S0 selected (Default)
1 = &S1 selected
Bit7 :
Long space disconnect (Yn)
0 = Y0 (Default)
