13Section 61245201L1-5, Issue 361245201L1-5C
Loop Interface:
Modulation Type................................................. 2B1Q
Mode.................................................................... Full Duplex, Echo Cancelling
Number of Pairs.................................................. One
Bit Rate................................................................ 784 kbps
Baud Rate............................................................ 392K baud
Service Range ..................................................... Defined by Carrier Service Area Guidelines
Loop Loss............................................................ 36 dB maximum @ 200 kHz
Bridged Taps....................................................... Single Taps < 2 kft, Total Taps < 2.5 kft
Performance ........................................................ Compliant with Bellcore TA-NWT-001210
Return Loss ......................................................... 20 dB (40 kHz to 200 kHz)
DSL Tx Signal Level.......................................... 13.5 dBm
Input Impedance.................................................. 135 Ω
DS1 Channelization............................................ Channels 1-12
Customer Interface:
4-wire DS1 (T1.403-compatible)
DS1 Signal Output Level.................................... Programmable through FT1 DP at 0, or -15 dB
DS1 Input Signal Level ...................................... 0, or -15 dB
DS1 Line Coding ................................................ AMI, B8ZS
DS1 Framing Format .......................................... SF, ESF
Power:
Span Power.......................................................... Selectable: less than -140 VDC (Class A2 with GFI circuit), or less than -190 VDC
(Class A2 with GFI circuit)
Locally Powered ................................................. -48 V at 75 mA
Clock Sources:
Clock Sources ..................................................... Internal, DSL Loop Derived
Internal Clock Accuracy..................................... ±25 ppm, (exceeds Stratum 4). Meets T1.101 timing requirements.
Tests:
Diagnostics.......................................................... Loopback (FNID), initiated with DDS latching loopbacks, initiated with FT1 DP
command. Self-Test.
Physical:
Dimensions.......................................................... 2.25" High, 8.75" Wide, 10.25" Deep
Weight................................................................. 4 pounds (standalone)
Environment:
Temperature ........................................................ Operating (Standard): -40° to +70°C; Storage: -40° to +85°C
Part Numbers:
Circuit Pack......................................................... 1245201L1
Table F. FNID Unit Specifications