PM4314-RI データシートの表示（PDF） - PMC-Sierra

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PM4314-RI

QUAD T1/E1 LINE INTERFACE DEVICE

PMC-Sierra 

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.

• 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.

• 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.

• 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.

• The inband code detection algorithm operates in the presence of a 10-2 bit

error rate.

• Programmable to detect CSU (Channel Service Unit), network, and far-end

loopback codes.

• 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

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