3com S21x Manual De Usuario
B-2
PathBuilder S21x Switch Cabling
CTP Access Cable
CTP Access Cable
CTP Cable
Connector and
Pinout
Connector and
Pinout
Use the supplied RJ45/DB25 cable to connect to the CTP Port (Port 4) and perform
CTP operations such as coldloading software images into a PathBuilder S21x switch.
CTP operations such as coldloading software images into a PathBuilder S21x switch.
Port 4 is a DCE. This table identifies the pinout for this RJ-45 connector:
RJ45 Pin
Signal
Pin Connection
on DB25F
Adapter
1 (not connected)
Request To Send (RTS)
4
2
DTE Ready (DTR)
20
3
Received Data (RXD)
3
4 (not connected)
Data Carrier Detect (DCD)
8
5
Signal Ground
7
6
Transmitted Data (TXD)
2
7
Data Set Ready (DSR)
6
8 (not connected)
Clear To Send (CTS)
5