14
Section 61180405L1-5, Issue 1
61180405L1-5A
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
Return Loss .......................................... 20 dB (40 kHz to 200 kHz)
DS1 Facility Interface
Fully compatible with D4 channel bank equipment
Power
Total Power .......................................... -48 VDC @ 125
m
A with FNID
-48 VDC @ 215
m
A with FNID and FT1 Repeater
-48 VDC @ 300
m
A with a locally-powered FNID and two FT1 Repeaters
FT1 DP Power Dissipation .................. 3.7 W with FNID
5.2 W with FNID and FT1 Repeater
6.1 W with a locally-powered FNID and two FT1 Repeaters
Span Power ........................................... -190 VDC nominal for voltage and current limit at 125
m
A
±
5%
(internally generated)
Clock Sources
Clock Sources ...................................... Internal, DS1 Derived
Internal Clock Accuracy ......................
±
25 ppm, (exceeds Stratum 4). Meets T1.101 timing requirements.
Tests
Diagnostics ........................................... Self-Test, Local Loopback (FT1 DP), Remote Loopback (FNID)
Mechanical
Dimensions ........................................... 3.0 in. High, 1.25 in. Wide, 9.5 in. Deep, nominal
Plugs into Total Access 1500
Environment
Temperature ......................................... Operating (Standard).... -40
°
C to +70
°
C
Storage .......................... -40
°
C to +85
°
C
Relative Humidity ................................ Up to 95 percent noncondensing
Part Number
................................... 1180405L1
Table 7. FT1 DP Unit Specifications
