S-COM 7K Manual page 257

Examples:
Dial the base station telephone number. When it answers, enter:
(PW) 63 13 1 *
This puts the controller into star/pound talkout mode. To exit the mode, enter:
(PW) 63 13 0 *.
Note: Be sure you have selected Base Station Mode with the Select Talkout
Transmitter Mode command on page 19-4.
Base Station Functions
19-3