ADTRAN HTU-C M R Installation And Maintenance Manual page 19

Loop Interface
Modulation Type ........................................................ 2B1Q
Mode ........................................................................... Full Duplex, Echo Cancelling
Number of Pairs ......................................................... Two
Bit Rate ....................................................................... 784 kbps per pair
Baud Rate ................................................................... 392K baud per pair
Service Range ............................................................ Defined by Carrier Service Area Guidelines
Loop Loss ................................................................... 36 dB maximum @ 200 kHz
Bridged Taps .............................................................. Single Taps < 2000 feet, Total Taps < 2500 feet
Performance ............................................................... Compliant with Bellcore TA-NWT-001210
HDSL Tx Signal Level .............................................. 13.5 dBm
Input Impedance ......................................................... 135Ω
Return Loss ................................................................ 20 dB (40 kHz to 200 kHz)
Network Interface
4-WIRE DSX-1
DSX-1 Output Level .................................................. 0 dB
DSX-1 Line Build Out ............................................... 0-133 feet ABAM
DSX-1 Line Code ....................................................... AMI, B8ZS
DSX-1 Format ............................................................ Unframed, SF, ESF
Power
Tested with the ADTRAN Low-Voltage HRE (P/N 1244041L2) and the ADTRAN Low Voltage HTU-R (1245021L1).
Total Power .................................................................... -48 Vdc @ 200 mA with HTU-R
HTU-C M R Power Dissipation .................................... 5.2 watts with HTU-R
Span Power .................................................................... -137 or -190 Vdc nominal for voltage and current limit at 125 mA +/-5%
Fusing ............................................................................. 1.00 A (not field-replaceable)
Clock
Clock Sources ............................................................ Internal, DSX-1 Derived
Internal Clock Accuracy ............................................ ± 25 ppm (exceeds Stratum 4). Meets T1.101 timing requirements.
Tests
Diagnostics ................................................................. Self-Test, Local Loopback (HTU-C), Remote Loopback (HTU-R), HRE
Physical
23" 220 Office Repeater Shelf-Mounted
Dimensions ................................................................. 5.6" High x 1.25' Wide x 10.1" Deep
Weight ........................................................................ Less than 1 lb.
Environment
Temperature ............................................................... Operating (Standard): -40° to +70°C; Storage: -40° to +85°C
Control Port
Interface ...................................................................... RS-232 (DB-9)
Terminal Type ............................................................ VT100 or compatible
Async Speed ............................................................... 1.2 kbps to 19.2 kbps
Data Format ................................................................ 8 data bits, no parity, 1 stop bit
Part Number
HTU-C 220/E220 Circuit Pack M R ......................... 1245001L6
61245001L6-5G
Table 11. Product Specifications
134-266 feet ABAM
267-399 feet ABAM
400-533 feet ABAM
534-655 feet ABAM
-48 Vdc @ 300 mA with HTU-R and HRE
-48 Vdc @ 510 mA with HTU-R and two HREs
6.2 watts with HRE and HTU-R
8.6 watts with two HREs and HTU-R
(Internally Generated)
Loopback
Section 61245001L6-5, Issue 7 19