ZyXEL Communications U-336SA - Manual (Page 156)

142 Connector Pinouts
12
Connector Pinouts
Phone Jack Pinouts
The ZyXEL U-336S/SA modem features two RJ-11 phone jacks, one
for 2-wire dial-up and 2-wire leased line connection (LINE) and one
for an optional connection to a telephone set (PHONE). The signals on
these pins are:
1 A
2 RING
3 TIP
4 A1
PC Serial Port Pinouts
Signal
Pin ITU-TSS
Signal
Name EIA
Signal
Name Pin/Signal
Description Direction
DTE-DCE
1 101 AA Protective Ground
(GND).
2 103 BA Transmitted Data
(TXD).
→
3 104 BB Received Data
(RXD).
←
4 105 CA Request To Send
(RTS).
→
5 106 CB Clear To Send
←