3Com PC Card User Manual - page 36

32

C

HAPTER

 5: U

SING

THE

 M

ODEM

S Registers

AT command settings are stored in S Registers. S-register values can be changed 

by AT command or by entering the new value of the S Register, preceded by AT. 

The command ATSn=v changes register n by setting its value to v.

For example, to change from manual answer to auto-answer after three rings, 

follow these steps:

1 Check the S Register table for the register that controls Answering. The functions 

are listed in alphabetical order.

2 Start your communications software and enter Terminal mode.

3 Type ATS0=3 and press [Enter]. The modem will now answer a call after three 

rings. 

All values are in decimal format. Default values indicated in bold type are those 

written after execution of the &F0 command. If the register TYPE is Nonstorable, 

this default value will also be written whenever the modem is reset. For storable 

register, however, the value after reset will be set to that stored in the appropriate 

stored profile.

■

Common Registers.

Registers S0 to S49 are common to all modems (although some of these 

registers are reserved.

■

Analog Modem Registers.

Registers S50 to S89 are exclusive to analog modem operations.

Register not listed are reserved.