LG GLOFA-GM Series User Manual page 40

Chapter 4 Performance specification
If CD signal is not controlled by external devices, it must be connected in 3-wire type connection as in [Figure 4.6].
Recent PC does not control CD signal line, so when connecting with PC, it must be connected in 3-wire type.
[Figure 4.6] Connection of 3-wire type (without handshake)
Cnet(9-PIN)
Pin No.
1
2
3
4
5
6
7
8
9
Remark
[Note1] When in null modem communication via RS-232C channel, wiring without handshake shall be
performed on the side of Cnet I/F module as in [Figure4.6] even if only 3 wires are used in
external devices.
[Note2] If not wired as in [Figure4.6], transmission in Cnet I/F module isn't available, however, receiving
via Cnet I/F module is allowed.
Connection No. and signal direction
Name
CD
RXD
TXD
DTR
SG
DSR
RTS
CTS
RI
4-8
Computer/communication
devices
Name
CD
RXD
TXD
DTR
SG
DSR
RTS
CTS
RI