Network Router User Manual

134 Terminal Pinouts
PC Serial Port Pinouts
Signa
l 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
(CTS).
←
6 107 CC Data Set Ready
(DSR).
←
7 102 AB Signal Ground
(GND).
8 109 CF Data Carrier
Detected (DCD).
←
15 114 DB Transmit Clock
Signal (source:
DCE).
←
17 115 DD Synchronous
Receive Clock.
←
18 141 Local Analog
Loopback Test.
→
20 108/2
108/1
CD Data Terminal
Ready (DTR).
Connect DCE to
line
→
21 140 Remote Digital
→