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PM8315 View Datasheet(PDF) - PMC-Sierra

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PM8315 Datasheet PDF : 330 Pages
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STANDARD PRODUCT
DATASHEET
PMC-1981125
ISSUE 7
PM8315 TEMUX
HIGH DENSITY T1/E1 FRAMER WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
extractor that supports signaling debounce, signaling freezing and interrupt on
signaling state change on a per-DS0 basis. The TEMUX also supports idle code
substitution, digital milliwatt code insertion, data extraction, trunk conditioning,
data sign and magnitude inversion, and pattern generation or detection on a per-
DS0 basis.
In the egress direction, framing is generated for 28 T1s into either a DS3
multiplex or a SONET/SDH mapped add bus. Each T1 transmitter frames to SF
or ESF DS1 formats, or framing can be optionally disabled. The TEMUX
supports signaling insertion, idle code substitution, data insertion, line loopback,
data inversion and zero-code suppression on a per-DS0 basis. PRBS generation
or detection is supported on a framed and unframed T1 basis.
In the ingress direction, each of the 21 E1 framers is extracted from
SONET/SDH VT2 or TU-12 mapped bus. Each E1 framer detects and indicates
the presence of remote alarm and AIS patterns and also integrates Red and AIS
alarms.
The E1 framers support detection of various alarm conditions such as loss of
frame, loss of signaling multiframe and loss of CRC multiframe. The E1 framers
also support reception of remote alarm signal, remote multiframe alarm signal,
alarm indication signal, and time slot 16 alarm indication signal.
E1 performance monitoring with accumulation of CRC-4 errors, far end block
errors and framing bit errors is provided. The TEMUX provides a receive HDLC
controller for the detection and termination of messages on the national use bits.
Detection of the 4-bit Sa-bit codewords defined in ITU-T G.704 and ETSI 300-
233 is supported. V5.2 link ID signal detection is also supported. An interrupt
may be generated on any change of state of the Sa codewords. An elastic store
for slip buffering and rate adaptation to backplane timing is provided, as is a
signaling extractor that supports signaling debounce, signaling freezing, idle
code substitution, digital milliwatt tone substitution, data inversion, and signaling
bit fixing on a per-channel basis. Receive side data and signaling trunk
conditioning is also provided.
In the egress direction, framing is generated for 21 E1s into a SONET/SDH
mapped add bus. Each E1 transmitter generates framing for a basic G.704 E1
signal. The signaling multiframe alignment structure and the CRC multiframe
structure may be optionally inserted. Framing can be optionally disabled.
Transmission of the 4-bit Sa codewords defined in ITU-T G.704 and ETSI 300-
233 is supported. PRBS generation or detection is supported on a framed and
unframed E1 basis.
The TEMUX can generate a low jitter transmit clock from a variety of clock
references, and also provides jitter attenuation in the receive path. Two low jitter
PROPRIETARY AND CONFIDENTIAL
27
 

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