Legacy Data Module (Ldm) And Legacy Data Expansion Module (Lem) - Nortel Passport 4400 Series Hardware Installation Manual

Connecting the Expansion Modules
Procedure 4: Attaching cables to the High-speed Data Module
Note: The connections made in this procedure will depend on the
As required, use a DB50 cable to connect each MD50 port to your local
1.
equipment.
For further information about cables and pin assignments, see Appendix A, "Cable
Diagram Pin Assignments."

Legacy Data Module (LDM) and Legacy Data Expansion Module (LEM)

The Legacy Data Module (LDM) provides interface ports to support legacy data
protocols in Passport 4400. Additional interface ports are supported through the
use of the Legacy Data Expansion Module (LEM).
Figure 4-4. Rear View of the Legacy Data Expansion Module
specific site requirements. If you are not sure of the exact
connections required for the Passport 4400 unit, consult your
system administrator.
see Figure 4-2
Management Port
RJ45 interface
1
RJ45
1
Pins 1, 2, 8 Not Connected
2
3
Data Terminal Ready
4
Signal Ground
5
Receive Data
6
Transmit Data
7
Clear to Send
8
Figure 4-3. Rear View of the Legacy Data Module
see Figure 4-2
Passport 4400 Hardware Installation Manual
Pin 1
DB9 connector for Token
Ring serial interface
1 Rx+
2
3
4
5 Tx-
6 Rx-
7
8
9 Tx+
Pins 2, 3, 4, 7, 8 Not Connected
4-3