AT Commands F-75
Register Descriptions
S27 Bit Mapped Register
Bit Position
Function
Decimal
Value
Description
0,1
transmission mode
0
asynchronous
mode (&M0)
1
asynchronous/
synchronous
mode (&M1)
2
synchronous
dial stored
number mode
(&M2)
3
synchronous
manual dial
mode (&M3)
2-3
leased-line
operation
0
leased line off
(&L0)
1
2-wire leased
line on (&L1 or
&L3)
2
4-wire leased
line on (&L2 or
&L4)
4,5
synchronous
transmit
0
default
clock source
1
&X1
2
&X2
3
not supported
6
answer tone when
at 1200 bps
0
1
ITU-T V.22bis/
V.22 (B0)
Bell 212A when
supported (B1)
7
not used
