User`s manual

Register S16, continued
4 RL 0-test disabled &T6
1-test enabled
5 RL/TP 0-test disabled &T7
1-test enabled
6 LL/TP 0-test disabled &T8
1-test enabled
7 TP 0-test disabled &T9
1-test enabled
S21 register - Bit mapped register
Bit Function Value Related command
0-1 Not used
2 RTS/CTS 0-normal RTS &R0
options 1-permanent RTS &R1
3-4 DTR options 0 - DTR off: command mode &D0
1 - dropping DTR enters &D1
command mode
2 - dropping DTR terminates &D2
switched call
3 - not used
5-6 DCD options 0-force DCD on &C0
1-normal DCD &C1
2-normal DCD/CTS off &C2
when DCD off
3-not used
7 DSR options 0-force DSR on &S0
1-normal DSR &S1