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Chapter 7 - Callback Security and Remote Configuration
7.5 Remote Configuration/Callback Security S-Registers
The following S-Registers are used with Remote Configuration and Callback Security features.
Remote Configuration Character (S13)
S13 defines the modem’s remote configuration escape character. When the S13 character is entered
three consecutive times from a remotely connected site, your modem responds to it with its Remote
Configuration procedure.
Units: ASCII
Range: 0-127
Default: 37 (% sign)
Callback Time Delay (S15)
S15 defines the time delay for Callback attempts after initial passwords have been exchanged
between modems.
Unit: Seconds
Range: 10-255
Default: 20
Callback Attempts (S16)
S16 defines the number of Callback attempts after initial passwords have been exchanged between
modems.
Unit: 1 Attempt
Range: 1-255
Default: 4
Failed Password Attempts (S26)
S26 counts the number of times there has been a failed password attempt. For example, if you
entered ATS26? the message 003 would be displayed, meaning someone has failed three times to
gain access to your modem using its password security system.
Units: 1 failed attempt
Range: 0-255
Default: 0
Local Inactivity Timer (S29)
S29 defines the amount of idle time that can elapse between AT commands after the SETUP
password has been entered. If this timer expires, the LOGIN and SETUP passwords will have to be
re-entered.
S29 only takes effect when the modem has been sent a #DB1 command, which secures the modem
from local and remote configuration or dialing (i.e., no AT commands can be sent until the LOGIN
and SETUP passwords have been entered).
Units: Minutes
Range: 1-255
Default: 20