6
61223445L1-5D
Connections
239 H4R Installation and Maintenance Practice
4. CONNECTIONS
All connections are made through card edge connectors.
provides the card edge pin assignments.
CAUTION
The H4R dissipates a maximum of 5.4 watts.
NOTE
Ensure that the chassis ground is securely connected to the apparatus case. Ground
pin designations are defined in
.
5. HDSL4 DEPLOYMENT GUIDELINES
Refer to the H4TU-C Installation and Maintenance Practice, HDSL4 Deployment Guidelines section, for loop
parameters including attenuation and loop resistance considerations.
NOTE
The H4TU-C with part numbers 1221401L6, 1221403L6, and 1221404L6 support
only one H4R in the HDSL4 circuit.
Refer to the Detailed Status Screen by accessing the menus on the H4TU-C craft terminal interface for current
Signal-to-Noise Ratio Margin and Attenuation status indications for the circuit.
Table 3. H4R Card Edge Pin Assignments
Pin
Designation
Description
1
GND
Ground
2
NC
No Connect
3
T1
Customer Loop 1 Tip
4
R1
Customer Loop 1 Ring
5
T1
Network Loop 1 Tip
6
R1
Network Loop 1 Ring
7
NC
No Connect
8
T
Network Loop 2 Tip
9
R
Network Loop 2 Ring
10
GND
Ground
11
T
Customer Loop 2 Tip
12
R
Customer Loop 2 Ring