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H2TU-C-231 L
The H2TU-C-231 List 2F functions as the central office end (H2TU-C) of a
repeaterless T1 transmission system when connected to a HiGain HDSL2 remote unit
(H2TU-R). Setting new standards for interoperability and efficiency, HiGain HDSL2
modules transmit a 1.554 Mbps T1 payload on one unconditioned copper pair over the
full Carrier Service Area (CSA) range.
F
EATURES
• Front-panel status LED, craft port, and
four-character status display
• Maintenance screens for inventory, provisioning,
troubleshooting, and performance monitoring
• Loss of Signal/Alarm Indication Signal
(LOS/AIS) payload alarm option
• Grounded loop detection
• Report menu option for downloading status
and performance monitoring data to a file
• Ultra-low wander
• Remote provisioning through TL1 FDL or 11-bit
payload commands
S
PECIFICATIONS
Operating Temperature
Operating Humidity
HDSL2 Span Voltage
Mounting
HDSL2 Line Rate
HDSL2 Output
Maximum Insertion Loss
Maximum Loop Attenuation
DSX-1 Line Rate
DSX-1 Line Format
DSX-1 Frame Format
DSX-1 Pulse Output
DSX-1 Input Level
2F
IST
-40°F to +149°F (-40°C to +65°C)
5% to 95% non-condensing
0 or -180 Vdc ± 5 Vdc
220 mechanics, high-density shelf
1.542 Mbps Overlapped Pulse Amplitude Modulation Transmission
with Interlocking Spectra (OPTIS)
+16.8 dBm ±0.5 dBm, 135Ω at CO side
+16.5 dBm ±0.5 dBm, 135Ω at remote side
35 dB at 196 kHz
28 dB
1.544 Mbps ±200 bps
Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)
pk-pk
6 V
, pre-equalized for 0 to 655 feet of ABAM cable
+1.5 to -7.5 dB DSX
• Payload (PL) or HiGain (HG) loopback
source identification
• Bipolar Violation Transparency (BPVT)
option
• Performance Report Messaging (SPRM,
NPRM, and AUTO)
• BER alarm option
• Power Back Off (PBON and PBOC) for
configuring HDSL2 transmit power levels
• Dual loopback commands
• 16-bit HDSL2 status retrieval command
(DBDB)
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