APPENDIX C. S REGISTERS

S18 *

Test timer

 

Default : 0

 

Sets the length of time in second which the modem conducts a test

 

before returning to the command mode. If this register is zero, the test

 

will not automatically terminate; the test must be terminated from the

 

command mode by issuing an AT&T0 or ATH command.

S19

Reserved

 

 

S20

Reserved

 

 

S21 *

Bit mapped options

 

Bit 0

0

AT&J0 (Default)

 

 

 

 

1

AT&J1

 

Bit 1

Reserved

 

Bit 2

0

AT&R0

 

 

 

Bit 3,4

1

AT&R1 (Default)

 

0

AT&D0

 

 

 

 

1

AT&D1

 

 

2

AT&D2 (Default)

 

Bit 5

3

AT&D3

 

0

AT&C0

 

 

 

Bit 6

1

AT&C1 (Default)

 

0

AT&S0 (Default)

 

 

 

Bit 7

1

AT&S1

 

0

ATY0 (Default)

 

 

 

 

1

ATY1

S22 * Bit mapped options

Bit 0,1

0ATL0

1ATL1

2ATL2

3ATL3

Bit 2,3

0ATM0

1ATM1

2ATM2

3ATM3

Bit 4-6

0ATX0

4ATX1

ACTIVE Professional External Modem User’s Manual

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