Johnson Controls METASYS User Manual page 58

Direct Connection
58 Network Terminal User's Manual
To establish a direct connection with the Metasys system, an NT
Emulator cable (included in this package) must be connected between the
NCM modular phone jack, labeled NTU, and the PC. The pinouts for the
RJ12 connector are shown below.
NCM
(RJ12 Connector)
SGNL PIN
1
+5V
2
NC
3
DSR
4
XMIT
5
RCV
6
GND
Figure 22: Pinouts for NT Emulator Cable
PC
(D25 Connector)
PIN SGNL
2
XMIT
3
RCV
4
RTS
5
CTS
6
DSR
7
GND
8
DCD
20
DTR