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NetComm NCT240 Installation Guide
Figure 5-1. Connecting to the Punch-down Blocks
DB-9 Port Pin Assignments
EIA Circuit CCITT Signal
BB
104
BA
103
AB
102
Console Port to 9-Pin DTE Port on PC
Switch's 9-pin Serial Port
2 RxD
3 TxD
5 SGND
Description
RxD (Received Data)
TxD (Transmitted Data)
SGND (Signal Ground)
CCITT Signal
<----------RXD ------------
-------------TXD ----------->
------------SGND -----------
Switch's DB-9
PC DB-9 DTE Pin
DTE Pin #
2
2
3
3
5
5
PC's 9-pin DTE Port
3 TxD
2 RxD
5 SGND
Release 1.0
#
31
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