Adtran AHDSL2 Manual de usuario descargar pdf (Pagina 11)

61221002L2-5B 11

Table 14. ADTRAN H2TU-C Specifications

Loop Interface

Modulation Type ............................................... 16 TC PAM

Mode .................................................................. Full duplex, partially overlapped echo canceling

Number of Pairs ................................................ One

Line Rate ........................................................... 1.552 mbps

Baud Rate .......................................................... 517.333 k baud

Service Range..................................................... Defined by CSA guidelines

Loop Loss .......................................................... 35 dB maximum @ 196 kHz

Bridged Taps ..................................................... Single Taps < 2 kft., total taps ≤2.5 kft.

Performance ...................................................... Compliant with T1.418-2000 (draft)

Input Impedance

Maximum Loop Resistance ............................... 900 Ω per span

H2TU-C Transmit Power (Data) Level ............. 16.6 ±0.5 dBm (0 to 450 kHz)

H2TU-C Transmit Power (Activation) Level ... 16.3 ±0.5 dBm (0 to 350 kHz)

................................................

135 Ω

Return Loss ....................................................... 12 dB (50 to 200 kHz)

Power

Power Consumption ........................................... +5 V: 1.7 watts typical; 48 V (includes H2TU-C and H2TU-R)

Span Power ......................................................... –190 VDC internally generated from the –48 VDC switch battery

Fusing ................................................................. –48 VDC (switch battery) is current-limited by a 500 mA Slo-Blo

subminiature

surface-mount fuse. +5 VDC is current-limited by a 3 A quick-acting

subminiature surface-mount fuse.

Clock

Clock Sources .................................................... Internal, DSX-1 derived

Internal Clock Accuracy .................................... ± 25 ppm, (exceeds Stratum 4). Meets T1.101 timing requirements

Tests

Diagnostics ........................................................ Local loopback (H2TU-C), remote loopback (H2TU-R)

Physical

Mounting ............................................................ Litespan 2000 CBA, Litespan 2012 CBA, or an ONU CBA

Dimensions ......................................................... 4.42 in. high x 0.84 in. wide x 10.4 in. deep (11.22 cm x 2.13 cm x 26.4 cm)

Weight ................................................................ Less than one pound

Environment

Temperature ....................................................... Operating (standard): –40°C to +70°C

Storage: –40 °C to 85°C

Humidity ............................................................ Up to 95% noncondensing

Part Number

1221002L2

.........................................................

Asynchronous H2TU-C Line Card Unit (AHDSL2), Narrowband

Compliance

Bellcore GR-1089-CORE (Class 2), ANSI T1.418-2002

NRTL listed to the applicable UL standards

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Adtran AHDSL2 Manual de usuario Pagina 11

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