User`s manual

AT Command Reference Manual
4-8 1048
S19 - AutoSync Bit Mapped Options
Defines the options for AutoSync operation (see &Q4 command). S19 must be set to the desired value before &Q4 is
issued.
Default: 0
Bit 0 Reserved
Bit 1 BSC/HDLC format select
0 = BSC selected (Default.)
1 = HDLC selected
Bit 2 Address detection enable/disable
0 = Disabled (Default.)
1 = Enabled
Bit 3 NRZI/NZI coding select
0 = NRZI (Default.)
1 = NZI
Bit 4 Idle indicator select
0 = Mark idle (Default.)
1 = Flag or sync idle
Bits 5 - 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 AutoSync operation (see &Q4
command). S20 must be set to the desired value before &Q4 is issued.
Range: 0-255
Default: 0