PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
Squelches RZ signals with pulse amplitudes below 140mV and 105mV for
CEPT and T1, respectively.
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Typical minimum sensitivity of 50 mV at transformer primary with a 1:2 turns
ratio transformer allows for terminating or bridged performance monitoring
applications.
Recovers a 1.544 MHz clock and DS-1 data or a 2.048 MHz clock and E1
data using a digital phase-locked loop to achieve high jitter accommodation.
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Accommodates up to 0.4 UI peak-to-peak, high frequency jitter to satisfy
AT&T TR 62411 and ITU-T G.823.
Optionally outputs either dual rail recovered line pulses or a single rail DS-
1/E1 signal.
Performs B8ZS or AMI decoding when processing a bipolar DS-1 signal and
HDB3 or AMI decoding when processing a bipolar E1 signal.
Detects line code violations (LCVs), B8ZS/HDB3 line code signatures, and
16, 8, or 4 successive zeros.
Accumulates up to 4095 line code violations (LCVs), for performance
monitoring purposes, over accumulation intervals defined by the period
between software write accesses to the LCV register.
Detects loss of signal (LOS), which is defined as 10, 15, 31, 63, or 175
successive zeros.
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Detects both programmable inband loopback activate and deactivate code
sequences received in the DS-1 data stream when they are present for 5
seconds. Optionally, enters loopback mode automatically on detection of an
inband loopback code.
Detects any pair of arbitrary inband codes from three to eight bits in length.
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The inband code detection algorithm operates in the presence of a 10 bit
error rate.
Programmable to detect CSU (Channel Service Unit), network, and far-end
loopback codes.
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Optionally allows jitter attenuation of recovered clock and data, using a 2 X 48
bit FIFO.
Optionally inserts unframed inband code sequences in place of recovered
data.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
2
PMC [ PMC-SIERRA, INC ]
