DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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2.9 T1/E1/J1 Line Interface
•
Requires only a 2.048MHz master clock for both E1 and T1 operation with the option to use 1.544MHz
for T1 operation
•
Fully software configurable
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Short-haul and long-haul applications
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Automatic receive sensitivity adjustments
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Ranges include 0 to 43dB or 0 to 12dB for E1 applications and 0 to 13dB or 0 to 36dB for T1
applications
•
Receive level indication in 2.5dB steps from -42.5dB to -2.5dB
•
Internal receive termination option for 75
Ω
, 100
Ω
, and 120
Ω
lines
•
Internal transmit termination option for 75
Ω
, 100
Ω
, and 120
Ω
lines
•
Monitor application gain settings of 20dB, 26dB, and 32dB
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G.703 receive synchronization-signal mode
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Flexible transmit waveform generation
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T1 DSX-1 line build-outs
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T1 CSU line build-outs of -7.5dB, -15dB, and -22.5dB
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E1 waveforms include G.703 waveshapes for both 75
Ω
coax and 120
Ω
twisted cables
•
AIS generation independent of loopbacks
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Alternating ones and zeros generation
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Square-wave output
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Open-drain output option
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NRZ format option
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Transmitter power-down
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Transmitter 50mA short-circuit limiter with current-limit-exceeded indication
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Transmit open-circuit-detected indication
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Line interface function can be completely decoupled from the framer/formatter
2.10 Clock Synthesizer
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Output frequencies include 2.048MHz, 4.096MHz, 8.192MHz, and 16.384MHz
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Derived from recovered receive clock
2.11 Jitter Attenuator
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32-bit or 128-bit crystal-less jitter attenuator
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Requires only a 2.048MHz master clock for both E1 and T1 operation with the option to use 1.544MHz
for T1 operation
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Can be placed in either the receive or transmit path or disabled
•
Limit trip indication