Low-Speed Data Service Modules - Nortel Passport 4400 Series Introduction Manual

Optional Modules

Low-speed Data Service Modules

Low-speed data service is provided through the Legacy Data Module (LDM).
The LDM provides interface ports that support legacy data protocols in Passport
4400. Additional interface ports are supported through the use of the Legacy
Data Expansion Module (LEM).
Rear View
Management Port
RJ45 Interface
Pin 1
RJ45
1
Pins 1, 2, 8 Not Connected
2
3
4
5
6
7
8
Pins for LDM Memory
Expansion Card
Indicators
Stacking
Connectors
Passport 4400 Introduction and Road Map
Data Terminal Ready
Signal Ground
Receive Data
Transmit Data
Clear to Send
Back
Legacy Data Module
Pin 1
DB9 Connector for Token
Ring Serial Interface
1 Rx+
2
3
4
5 Tx-
Rx-
6
7
8
9 Tx+
Pins 2, 3, 4, 7, 8 Not Connected
3-9