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T
HRU-488 L
HE
®
The HiGain
repeaterless T1 transmission system. The HLU connects to a HiGain Line Unit (HLU)
High-bit-rate Digital Subscriber Line (HDSL), creating a system that provides 1.544
Mbps transmission on two unconditioned copper pairs over the full Carrier Service
Area (CSA) range. HiGain Doubler Units (HDUs) can also be used to extend the
range. The HRU-488 List 1 supports local powering only.
F
EATURES
• 1.544 Mbps full-duplex transmission on two
unconditioned copper pairs
• Status Light Emitting Diodes (LEDs) for
Digital Signal Level 1 (DS1) and HDSL
• Craft port access for maintenance terminal
connection
• Double Dual Module Plus (DDM+) mechanics
• Support for up to five spans
• HiGain maintenance screens for inventory,
provisioning, troubleshooting, performance
monitoring, and reporting
S
PECIFICATIONS
Operating Temperature
Operating Humidity
Line Power Consumption
Electrical Protection
Mounting
HDSL Line Code
HDSL Output
DS1 Pulse Output
Maximum Provisioning Loss
DS1 Line Rate
DS1 Line Format
DS1 Frame Format
1
IST
Remote Unit HRU-488 List 1 functions as the remote end of a
• Generic and addressable repeater loopback
activation codes
• Lightning and power cross-protection on
HDSL and DS1 interfaces
• Local powering only with sealing current
option
• Ultra-low wander
• Fuse alarm circuit
• Two HDSL interfaces to HLU, HDU
-40 °F to + 149 °F (-40 °C to + 65 °C)
5% to 95% non-condensing
3.1 Watts
Secondary surge and power cross-protection on
all DS1 and HDSL ports
DDM+ high-density shelf
784 kbps 2B1Q (each loop)
+13.5 dBm ±0.5 dB, 135 Ω
0 dB or -15 dB
35 dB at 196 KHz, 135 Ω
1.544 Mbps ±200 bps
Alternate Mark Inversion (AMI) or Bipolar with
8-Zero Substitution (B8ZS)
Extended Super Frame (ESF), Super Frame (SF),
or Unframed (UNFR)
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