Maintenance; Product Specifications - ADTRAN HTU-C NB Installation And Maintenance Practice

MAINTENANCE

The HTU-C NB/WB for Litespan requires no routine maintenance for normal operation.
ADTRAN does not recommend that repairs be attempted in the field. Repair services may be
obtained by returning the defective unit to ADTRAN. Refer to
section for further information.

PRODUCT SPECIFICATIONS

Product specifications are listed in
Table 16. HTU-C NB/WB for Litespan Specifications
Specification
Tested with the ADTRAN Low-Voltage HRE (P/N 1247045L1) and the ADTRAN Low Voltage HTU-R (1247026L4).
61247002L1-5A
Table 16.
Loop Interface
Modulation Type:
Mode:
Number of Pairs:
Bit Rate:
Baud Rate:
Service Range:
Loop Loss:
Bridged Taps:
Performance:
HDSL Tx Signal Level:
Input Impedance:
Return Loss:
Total Power:
HTU-C Power Dissipation:
Span Power:
Fusing:
Clock Sources:
Internal Clock Accuracy:
Diagnostics:
the"Appendix B, Warranty"
2B1Q
Full Duplex, Echo Cancelling
Two, with connections to
narrowband and wideband
784 kbps per pair
392 baud per pair
Defined by CSA guidelines
35 dB maximum at 200 kHz
Single Taps < 2 kft;
Total Taps < 2.5 kft
Compliant with Bellcore TA-NWT-001210
13.5 dBm
135 ohms
20 dB (40 kHz to 200 kHz)
Power
–48 VDC at 135 mA with HTU-R
–48 VDC at 255 mA with HTU-R and HRE
3.65 watts with HTU-R
4.24 watts with HRE and HTU-R
–137 VDC for voltage and current limit at
160 mA ±5% (Internally Generated)
1.00 A (not field-replaceable)
Clock
Internal, DSX-1 Derived
±25 ppm (exceeds Stratum 4). Meets T1.101
timing requirements.
Tests
Local Loopback (HTU-C), Remote Loopback
(HTU-R), HRE Loopback, Self-Test
Maintenance
Description
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