IBM PRO/100 SP manual AT commands reference S-Registers1

Table 5: The S-Register Summary. The S-registers 42 and 43 are for testing and

debugging purposes only.

Register	Default	Description
S10	20	Automatic disconnect delay
S11	95	DTMF dialing speed
S12	50	Escape guard time
S14	8	General bit-mapped options status
S21	48	V.24 bit-mapped options status
S22	112	Results bit-mapped options status
S24	10	Timer to control sleep mode
S28	1	V.34 modulation enable/disable
S30	0	Inactivity timer
S32	16	Synthetic ring volume
S33	0	Synthetic ring frequency
S35	0	Data calling tone
S36	7	Negotiation fallback
S37	0	Dial line rate
S38	1	Enable/disable K56flex settings
S42	1	Auto rate
S43b	1	Auto mode
S48	7	LAPM error control and feature negotiation
S89	10	Timer to control sleep mode
S90	10	Local phone status
S91	5	Line transmit level
S108	7	Network codec type

AT commands reference S-Registers1

S-registers generally affect how the AT commands perform. Contents of the registers can be displayed or modified when the modem is in command mode.

To display the value of an S-register:

TYPE: ATSn where n is the register number.

PRESS: Enter

1. Lucent Technologies, Host-Based Controller Modem AT Command Set, Version 1.1, June 15, 1998.

B-4Intel® PRO/100 SP Mobile Combo Adapter: User’s Guide