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
