Reference Guide for the Model XM128 ISDN Digital Modem
D-2 Status Registers and Result Codes
2. Type the &Vn command AT&Vn to view all of the S-register settings.
To view different S-register settings, use the following for n:
• 0 for viewing S-register settings for current active profile
• 1 to 4 for viewing settings for user profile number (n-1)
• 5 for viewing the factory default settings
• 6 for viewing the setting of PHONE 1
• 7 for viewing the setting of PHONE 2
3. Type the command ATSr.b? to display the value of bit b of S-register r.
Setting S-Registers
In the commands to change the value in S-register r and to change the value in a specific bit of
S-register r, n is a decimal number in the giv en range. Alt hough th e fir st comman d modifie s all b its
in the S-register simultaneously, the second command le ts you change bit b without af f ecting othe r
bits in this S-register. When using ATSr=n, do a conversion to or from the binary number to find
out which bits to manipulate.
To change the S-register values, follow these steps:
1. Type the command ATSr=n (range 0-255) to change the value in S-reg ister r to value n.
2. Type the command ATSr.b=n (range 0-1) to change the value in a specific bit (b) of
S-register r.
Examples for Setting S-Registers
If you want to set S38 bit 3 to 1 for a specific application, use either the simple command
ATS38.3=1 or use the difficult method outlined in the following steps:
1. Read the value from S38 using the ATS38? command.
Note: The values used in the examples differ from the actual values in the S-register and
are used for demonstration purposes only.