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Status Registers
10-4 Modem 3600
Individual Bit Command Sn . # =v
Some operators use AT commands as the primary method of changing
S-register options. However, some options stored in registers do not
have an associated AT command. For these options, the individual bit
AT command can be used to change the setting of the bit controlling the
option.
To change a single bit value within a register, enter
ATSn.#=v
where n = register number, # = bit position 0 through 7, and v = bit
value 1 or 0.
For example, S-register 27, bit 2, selects between dial-up or leased line
operation:
AT command method:
AT&L selects dial-up operation (sets S27 bit 2 to 0).
AT&L1 selects leased line operation (sets S27 bit 2 to 1).
Individual bit method:
ATS27.2=0 selects dial-up operation (sets S27 bit 2 to 0)
ATS27.2=1 selects leased line operation (sets S27 bit 2 to 1)
Note
This way of selecting options can be used on all S-registers
except read only registers.
Autoanswer S0
This register turns the autoanswer option on or off. Set the register to 0
to turn autoanswer off.
Set the register to any value other than zero (1-255) to turn autoanswer
on. The number selected is the ring count the modem answers on. For
example, if S0 equals 4, the modem answers the call on the fourth ring.
The default value is 1.
Ring Count S1
This register contains the ring count for a current incoming call and
should not be changed. If you are developing communications software,
the program can read the register to determine the ring total.