User`s manual

S17

Reserved

S18

Modem Test Timer

S18 specifies the amount of time that the modem will conduct

one of the Ioopback tests (&Tn). After timing out, the modem

returns back to command mode. Setting S18 to zero disables the

modem test timer; the Ioopback test must be terminated by issuing

the appropriate escape sequence followed by an ‘AT&T0’ or ‘ATH’.

Range:

0-255 seconds

Default: 0 second

S19

Reserved

S20 Reserved

S21

Bit Mapped Options

Bit Value Description

Bit 0

&J0 is selected. (default)

&J1 is selected.

Bit 1

Reserved.

Bit 2

&R0 is selected. (default)

&R1 is selected.

3 - S REGISTER REFERENCE