Dedicated E1
C–7
Dedicated E1
The dual-interface Dedicated E1 module supports
dedicated (directly connected) E1 connections. (The
E1/ISDN module supports both switched and dedicated
connections.)
A Dedicated E1 module ships with two Dedicated E1
cables—one for each interface. The cable provides
❐
An RJ-45 modular plug that connects to the
Dedicated E1 module
❐
Two 120
Ω
RJ-11 modular plugs that connect to two
75
Ω
BNC baluns, depending on your requirements
The RJ-11 connector—labeled
P1—
transmits data, and
the
P2
connector receives data. The cable also provides
a grounding strap that connects to the module.
Table C–4 lists the pin assignments for an RJ-45 modular
jack on a Dedicated E1 module. Use these assignments
when building a cable to connect directly to the Dedicated
E1 module.
Table C–4. Pin Assignments for a Dedicated E1 Module RJ-45
Modular Jack
Pin
Description
1
Receive ring
2
Receive tip
3
Not used
4
Transmit ring
5
Transmit tip
The remaining pins are not used.