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239 H4R Installation and Maintenance Practice Specifications
61223445L1-5D 11
Table 7. 239 T1 HDSL4 Repeater (H4R) Specifications
Specification Description
Loop Interface
Modulation Type:
Mode:
Number of Pairs:
Line Rate:
Baud Rate:
Loop Loss:
Bridged Taps:
Performance:
H4TU-C Transmit Power (Data) Level:
H4TU-C Transmit Power (Activation) Level:
Input Impedance:
Maximum Loop Resistance:
Return Loss:
16 TC PAM
Full Duplex, Partially overlapped echo canceling
2
1.552 Mbps
261.333 k baud
Refer to “HDSL4 Deployment Guidelines” on page 6.
Single Taps < 2000 ft., Total Taps < 2500 ft.
Compliant with T1.418-2000 (HDSL4 Standard, Issue 2)
14.1 ±0.5 dBm (0 to 400 kHz)
14.1 ±0.5 dBm (0 to 307 kHz)
135 ohms
Refer to “HDSL4 Deployment Guidelines” on page 6.
12 dB (50 kHz to 200 kHz)
Power
Tested with the ADTRAN H4TU-R (P/N 1223426L1) and H4R (P/N 1223445L1)
H4R Input Power 5.0 watts (span powered by H4TU-C)
Clock
Clock Sources:
Internal Clock Accuracy:
DSX-1 Derived (with HDSL4 frame bit stuffing)
±25 ppm (Exceeds Stratum 4), Meets T1.101 Timing
Requirements
Tests
Diagnostics: Loopback initiated with in-band codes or from H4TU-C or
H4TU-R craft interface
Physical
239 Repeater, Apparatus Shelf-Mounted, Weight: < 1lb.
Environment
Standard Operating Temperature:
:Storage Temperature:
–40ºC to +70ºC
–40ºC to +85ºC
Compliance
UL 60950
NEBS Level 3 (SR-3580)
FCC 47CFR Part 15, Class A
Part Number
239 T1 HDSL4 Repeater (H4R): 1223445L1