Philips SOPHO Call@Net Manual page 70

Figure B-2 Schematic Overview of Modem connected to MLU.
The V.24 signals mentioned are explained in more detail below.
- CT103 (TXD) transmitted data:
Digital information that is to be modulated and transmitted.
70
MODEM
DATA/VOICE
CONTROL
TRANS/REC
CONTROL
MOD
DEMOD
RECEIVE
CLOCK
CARRIER
DETECT
RING
INDICATOR
TEST
CONTROL
CDSL CT108.1
DSR CT107
RTS CT105
RFS CT106
TSET CT113 *)
TXD CT103
DSRS CT111
STF CT126
RxD CT104
RSET CT115 *)
DCD CT109
RI CT125
RIL CT140
TI CT142
LL CT141
*) Only used with synchronous communication.
MLU
TRANSMIT
CLOCK
SHIFT
REGISTER
SHIFT
REGISTER