15
Section 61245001L7-5, Issue 1
61245.001L7-5A
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: ............................................... 135
Ω
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
134-266 feet ABAM
267-399 feet ABAM
400-533 feet ABAM
534-655 feet ABAM
DSX-1 Line Code: .............................................. AMI, B8ZS
DSX-1 Format: ................................................... SF, ESF, Unframed
DSX-1 Channelization: ...................................... Channels 1-12 on HDSL Loop 1, Channels 13-24 on HDSL Loop 2
Power
Tested with the ADTRAN Low-Voltage HRE (P/N 1244.042L1) and the ADTRAN Low Voltage HTU-R (1245.021L1).
Total Power: .......................................................... -48 VDC @ 180
mA with HTU-R
-48 VDC @ 370
mA with HTU-R and HRE
HTU-C Power Dissipation: .................................... 5 watts with HTU-R
6 watts with HRE and HTU-R
Span Power: .......................................................... <-140 VDC (Internally Generated) current limited at 150
mA
Fusing: ................................................................... 1.00 A BUSS GMT-1.00 or equivalent (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)
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 (DB9)
Terminal Type: ................................................... VT 100 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 ........................... 1245001L7
Table H. HDSL 220/E220 Low Voltage HTU-C Specifications
