A. Connectors and Pin Assignments
A-6
October 2002 4200-A2-GN20-10
4202 E1 Uplink Module Connectors
The 4202 E1 Uplink Module has two types of connectors, only one of which may
be used at a time:
120
Ω
Connector
75
Ω
Connector TX/RX Connectors
120
Ω
Connector
The 120
Ω
connector is a single, RJ48C, unkeyed, shielded, 8-pin modular jack.
The shield is connected to ground via the module. Pin assignments for the 120
Ω
connector are shown in Table A-7.
75
Ω
TX/RX Connectors
The 75
Ω
TX/RX connectors each use coaxial cables that are unbalanced with
respect to ground. The shield of the TX cable is connected directly to ground at the
E1 module. The shield of the RX cable is capacitor-coupled to ground at the
module. Pin assignments for the 75
Ω
TX/RX connectors are shown in Table A-8.
Table A-7. 4202 E1 Uplink Module 120
Ω
Connector
Signal Direction Pin
Receive Ring In 1
Receive Tip In 2
NC — 3
Transmit Ring Out 4
Transmit Tip Out 5
NC In 6
NC — 7
NC — 8
Table A-8. 4202 E1 Uplink Module 75
Ω
TX/RX Connectors
Signal Direction Pin
Transmit Out Coax Center Conductor
Transmit Signal and Chassis Ground — Barrel
Receive In Coax Center Conductor
Receive return path (not grounded) Out Barrel
