STANDARD PRODUCT
PM4328 TECT3
DATASHEET
PMC-2011596
ISSUE 1
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
disabled. The TECT3 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 the DS3
following the ITU-T G.747 recommendation. 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 TECT3 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 the DS3 following
the ITU-T G.747 recommendation.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 TECT3 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
recovered T1 clocks can be routed outside the TECT3 for network timing
applications.
Serial PCM interfaces to each T1 framer allow 1.544 Mbit/s ingress/egress
system interfaces to be directly supported. Tolerance of gapped clocks allows
other backplane rates to be supported with a minimum of external logic.
PROPRIETARY AND CONFIDENTIAL
21
PMC [ PMC-SIERRA, INC ]
