PM4318-BI データシートの表示（PDF） - PMC-Sierra

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PM4318-BI

OCTAL E1/T1/J1 LINE INTERFACE DEVICE

PMC-Sierra 

PRELIMINARY

DATASHEET

PMC- 2001578

ISSUE 3

PM4318 OCTLIU

OCTAL E1/T1/J1 LINE INTERFACE DEVICE

1.1 Each Receiver Section:

• Supports T1 signal reception for distances with up to 36 dB of cable attenuation at nominal conditions

using PIC 22 gauge cable emulation.

• Supports E1 signal reception for distances with up to 36 dB of cable attenuation at nominal conditions

using PIC 22 gauge cable emulation.

• Supports G.772 compliant non-intrusive protected monitoring points.

• Recovers clock and data using a digital phase locked loop for high jitter tolerance.

• Tolerates more than 0.3 UI peak-to-peak; high frequency jitter as required by AT&T TR 62411 and

Bellcore TR-TSY-000170.

• Outputs either dual rail recovered line pulses, a single rail DS-1/E1 signal or parallel data in SBI bus

format.

• 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 4 (E1+HDB3), 8

(T1+B8ZS) or 16 (AMI) successive zeros.

• Accumulates up to 8191 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 programmable inband loopback activate and deactivate code sequences received in the DS-

1 data stream when they are present for 5.1 seconds. Optionally, enters loopback mode

automatically on detection of an inband loopback code.

• Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving 192-bit window.

• A pseudo-random sequence user selectable from 211 –1, 215 –1 or 220 –1, may be detected in the

T1/E1 stream in either the receive or transmit directions. The detector counts pattern errors using a

24-bit saturating PRBS error counter.

1.2 Each Transmitter Section:

• Supports transfer of transmitted single rail PCM and signaling data from 1.544 Mbit/s and 2.048

Mbit/s backplane buses.

• Generates DSX-1 shorthaul and DS-1 longhaul pulses with programmable pulse shape compatible

with AT&T, ANSI and ITU requirements.

• Generates E1 pulses compliant to G.703 recommendations.

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

2

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