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H4TU-C-319 L
The H4TU-C-319 List 1 line unit is the Central Office (CO) side of a T1 transmission
system. The H4TU-C, when used with an H4TU-R remote unit, transmits a
1.544 Mbps payload a maximum distance of 12 kft. over two unconditioned copper
pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach can be
extended to a maximum of 34 kft. (See Specifications below.)
The H4TU-C is designed to mount in 3192 mechanics shelves.
F
EATURES
Front-panel features: status LED, craft port,
MODE and SEL pushbuttons for setting system
parameters and activating loopback commands
(including dual loopbacks), DSX-1 test jacks, and
a four-character status display
HDSL4 transmission features:
• Doubler (HD4) support for up to three spans
• Grounded loop detection on HDSL4 spans
• Bit Error Rate Tester (BERT)
• Spectrum compatibility with ADSL services
S
PECIFICATIONS
Operating Temperature
Operating Humidity
CSA Reach
HDSL4 Span Voltage
CO Supply
Mounting
HDSL4 Line Rate
HDSL4 Output
Maximum Insertion Loss
Maximum Loop Attenuation
DSX-1 Line Rate
DSX-1 Line Format
Operating Temperature
Operating Humidity
1
IST
-40°F to +149°F (-40°C to +65°C)
5% to 95% non-condensing
34 kft. maximum using 26 AWG wire: 12 kft. (span 1), 11 kft. (span 2),
11 kft. (span 3)
0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)
-48 Vdc nominal (-42.5 to -56.5 Vdc)
3192 high-density shelf
784 kbps Overlapped Pulse Amplitude Modulation (OPAM)
transmission per pair
+14.1 dBm ±0.5 dBm, 135Ω
Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz
Span 1 = 31 dB
Span 2 and Span 3 = 29 dB
1.544 Mbps ±200 bps
Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)
-40°F to +149°F (-40°C to +65°C)
5% to 95% non-condensing
Maintenance screens for inventory,
provisioning, performance monitoring, and
troubleshooting, including:
• Remote provisioning
• Loop attenuation and insertion loss reporting
• Power Back Off (PBON and PBOC) for
configuring HDSL4 transmit power levels to
reduce crosstalk
• Report menu option for downloading status
and performance data
Sources sealing current when connected to any
locally powered H4TU-R-402
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