Nortel Networks Passport 4400 - Manual (Page 52)

Connecting the Expansion Modules Passport 4400 Hardware Installation Manual
4-6
E1 Voice Module (EVM)
Note: Before you can connect this module, the E1 Voice Module
location switch must be set for slot B. If your Passport 4400 unit
has been factory assembled, the switch has already been set for
slot B. Refer to section 6, “Installing Expansion (Data and Voice)
Modules,” for further information.
This module can be connected with either a 75
Ω
termination or a 120
Ω
termination. These terminations are determined by jumper settings on the
module board. If you are unsure how these jumpers are set or if you want to change
the settings on the unit you have received, see section 9 before connecting this
module.
Figure 4-6. Rear View of the E1 Voice Module
Procedure 8: Attaching cables to the E1 Voice Module
Note: The connections made in this procedure will depend on the
specific site requirements. If you are not sure of the exact
connections required for the Passport 4400 unit, consult your
system administrator.
1. Use either the DB9 connector (120
Ω
) or the two BNC connectors (75
Ω
, one
for transmit and one for receive), as applicable, to connect Line 1 to your
interfacing equipment.
For further information about cables and pin assignments, see Appendix A, “Cable
Diagram Pin Assignments.”
Rear Panel
Line 1
E1 Interface
Connectors
For 75
Ω
Interface
Receive
Pair Transmit
Pair
DB9 Connector
For 120
Ω
Balanced
pair Interface
1
2
3
4
5
6
7
8
9 Tx Tip
Rx Tip
Tx Ring
Rx Ring
(The outer
conductor can be
strapped for earth
or isolated. Refer
to section 9.
Reserved for future use
Pins 2, 4, 5, 7, 9 Not Connected
Pin 1