Specifications

February 23, 2000 Motorola Personal Communications Sector Page 48
Satellite Subscriber Products Division
Motorola Personal Communications Sector
Satellite Subscriber Products Division
ISU AT Command Reference S-Register Definitions
10 S-Register Definitions
S-registers allow control over specific ISU modem operations. Some contain a numeric value, others are bit
mapped. When bit mapped, each bit of the register controls a specific function: for further details refer to the
glossary. The registers are described by the register number, the range of values which can be entered and
the default value. Those not listed are RESERVED.
10.1 Standard S-Registers
Register
Number
Range Default Description
S0
0-255 0 Auto-answer. Assigning a value from 1 to 255 in
register S0 tells the ISU to automatically answer
incoming calls. The factory setting of 0 turns off the
automatic answer feature.
S1
0-255 0 Ring count (read only)
S2
0-255 43 Escape code character
S3
0-127 13 Carriage return character
S4
0-127 10 Line feed character
S5
0-32 8 Backspace character
S6
0-255 4 Wait for dial-tone.
No action, compatibility only
S7
0-255 50 Wait time for carrier.
No action, compatibility only
S8 0-255 4 Pause time for comma.
No action, compatibility only
S9 0-255 6 Carrier detect response time.
No action, compatibility only
S10 0-255 14 Carrier loss time.
No action, compatibility only
S11 0-255 0 DTMF tone duration.
No action, compatibility only
S12 0-255 40 Escape guard time. Time, in 50ths of a second, until
OK displayed after entering command mode by
escape sequence.
S14 0-255 170 Bitmap register where bit 1 reflects the En setting,
bit 2 reflects the Qn setting and bit 3 reflects the Vn
setting.
S21 0-255 48 Bitmap register where bits 3 and 4 reflect the &Dn
setting and bit 5 reflects the &Cn setting.
S22 0-255 246 Bitmap register where bits 2 and 3 reflect the Mn
setting and bits 4, 5 and 6 reflect the Xn setting.
Table 1: Standard S-Registers