Black Box 3600 MODEM manual Individual Bit Command Sn . # =v, Ring Count S1

Status Registers

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.

10-4 Modem 3600