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Chapter 6 - S-Registers
S15
Callback Time Delay
Unit: Seconds
Range: 10-255
Default: 20
Description: S15 defines the time delay between Callback attempts after initial passwords have
been exchanged between modems. Refer to Chapter 7 for Callback Security
information.
S16
Callback Attempts
Unit: 1 Attempt
Range: 1-255, 1-2***
Default: 4, 2***
Description: S16 defines the number of attempts allowed after initial passwords have been
exchanged between modems.
S17
Changing Break Time
Unit: 10 mSec.
Range: 0-2.5 sec
Default: 250
Description: S17 defines the break time (space) sent to the local PC. The default is set for a 25 to
250 mSec break. The break time can be changed in 10 mSec increments by
increasing or decreasing the value of S17.
S18
Automatic Leased Line Restoral
Unit: 1 minute
Range: 10-255
Default: 30 minutes
Description: When the modem is in dial backup mode, it periodically checks the lease line to see
if it is operational and tries to restore the lease line if possible. S18 defines how often
attempts occur. The default of S18 is 30 minutes and can be set in one minute
increments from 10 to 255 minutes. Setting the S18 restoral under 10 minutes
causes excessive breaks in dial-up operation.
S19
Dial-Back Timer
Unit: 1 minute
Range: 0-255
Default: 1
Description: S19 is a timer that begins when the lease line goes down. S19 specifies the duration
of time the modem attempts to reestablish the lease line connection.
* Value for International and DOC units
** Value for International units only
***BLK models only