ADTRAN 239 T1 HDSL4 - Manual (Page 12)

6 61223445L1-5D
Connections 239 H4R Installation and Maintenance Practice
4. CONNECTIONS
All connections are made through card edge connectors.
Table 3 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
Table 3 .
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