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Ethernet Base ModulePassport 4400 Hardware Installation Manual
3-4
Management Port
The Management Port, located on the back panel of the Ethernet Base Module,
allows you to connect the Passport 4400 unit to a Command Port (PC/CPU) or
to a modem.
The Management Port has the following functions:
• Supports asynchronous operation using an RS-232/V.24 physical driver
• Data rate is automatically selected for speeds from 9.6 to 38.4 Kb/s
• Management port is RS-232/V.24
−
a crossover cable is required for DTE
operation
Figure 3-4. Management Port Connectors and Pin Assignments
Frame Relay DCE Serial Access Port (Port 1)
The Frame Relay DCE Serial Access Port (Port 1), located on the back panel of
the Ethernet Base Module, has the following features:
• 50-pin serial data port
• Interface determined by cable: RS-232/V.24, V.35, V.36, or X.21
• Mode (DCE or DTE) determined by cable.
Notes: •
In DCE mode, the management port supplies the DTE
with both transmit and receive clock.
•
In DTE mode, clocking is provided externally for both
transmit and receive. Default clocking speed in 192 Kb/s.
Signal Ground (SG)
Receive Data (RxD)
Transmit Data (TxD)
RJ-45 Pin Assignments
RJ-45
Pin 1
1
2
3
4
5
6
7
8
Pins 1, 2 and 8 Not Connected
Data Transmit Ready (DTR)
Clear to Send (CTS)
DB-25