Modem User Manual

Status Registers
10-12 V.3600
Bit Mapped — S27
Lookback Timer — S28
The S28 register specifies the amount of time in 1.0 minute increments
that the modem will remain in dial backup mode before retrying leased
line mode. A zero will disable automatic lookback to leased line. The
default value is 15 minutes.
Bit Mapped — S29
Bit Value Command Description
1,
0
00
01
10
11
&M
&M1
&M2
&M3
Async
Sync data / async dial
Sync data / dial through DTR
Sync data / manual dial
2 0
1
&L
&L1 and
&L2
Dial-up line
Leased line
3-- -- Reserved
5,
4
00
01
10
11
&X
&X1
&X2
--
Internal clock
External clock
Receive clock
Not used
61
0
-- Enable async DTR dialer
Disable async DTR dialer
7-- -- Reserved
Bit Value Command Description
7-
0
0-255 -- Time in 1 minute increments (0=disabled)
Bit Value Command
Description
0 0
1
*NT1
*NT
Enable AT command set
Disable AT command set
1 0
1
*RO
*RO1
Options retained at disconnect
Options restored at disconnect
2 0
1
*FT
*FT1
Disable V.32 fast train
Enable V.32 fast train