Specifications

Chapter 1 Introduction Installation and Operation Manual
1-8 Technical Specifications ASMi-31 Ver. 3.0
1.4 Technical Specifications
Line Interface
Type 2-wire, full duplex operating over unconditioned lines
(twisted pair), using echo cancellation
Coding 2B1Q
Range Up to 7 km (4.3 miles) over a 24 AWG pair, independent
of data rate according to the ANSI T1.601-1992
guidelines
Levels • Up to 14 dBm, assuming a 135Ω load
• Between 13 dBm and 14 dBm over the 0 Hz–80 kHz
frequency band (ANSI T1.601-1992 5.3.2.2)
Standard Complies with ANSI T1.601.1988 specifications
Power Spectral
Density
• 1 kHz to 50 kHz = -30 dB/Hz
• 50 kHz to 500 kHz = -50 dB/decade
• Over 500 kHz = -80 dB/Hz
(ANSI T1.601-1992 5.3.2.1)
Connector RJ-45 and 3-clip terminal block
Return Loss • 1 kHz – 0 dB
• 10 kHz to 25 kHz – 20 dB
• 250 kHz – 0 dB
Protection According to ITU K.21 requirements
DTE Interface
Types and
Connectors
• V.24: 25-pin, D-type, female
• V.35: 34-pin, female
• X.21: 15-pin D-type, female
• RS-530: 25-pin, D-type, female
• V.36: via adapter cable converting between RS-530
connector and 37-pin, D-type, female connector
• G.703 Codirectional: 5-clip terminal block or RJ-45
Note: For the G.703 codirectional interface, byte
synchronization is not kept end-to-end. A violation bit
is inserted every eight bits, but it does not appear in
the same location at the remote end.
• IR-ETH: RJ-45
• IR-IP: RJ-45