STANDARD PRODUCT
PM4328 TECT3
DATASHEET
PMC-2011596
ISSUE 1
HIGH DENSITY T1/E1 FRAMER
AND M13 MULTIPLEXER
the output signaling for the entire superframe in which the slip occurred; the
signaling is unfrozen when the next slip-free superframe occurs.
The SIGX also provides control over timeslot signaling bit fixing, data inversion
and signaling debounce on a per-timeslot basis.
The SIGX block also provides an interrupt to indicate a change of signaling state
on a per channel basis.
9.10 Receive Per-Channel Serial Controller (RPSC)
The RPSC allows data and signaling trunk conditioning to be applied on the
ingress stream on a per-channel basis. It also allows per-channel control of data
inversion, the extraction of clock and data on ICLK[x] and ID[x] (when the Clock
Master: NxChannel mode is active), and the detection or generation of pseudo-
random patterns. The RPSC operates on the data after its passage through
ELST, so that data and signaling conditioning may overwrite the ELST trouble
code.
9.11 Basic Transmitter (XBAS)
The T1 Basic Transmitter (XBAS) block generates the 1.544 Mbit/s T1 data
stream according to SF or ESF frame formats.
In concert with the Transmit Per-Channel Serial Controller (TPSC), the XBAS
block, provides per-channel control of idle code substitution, data inversion
(either all 8 bits, sign bit magnitude or magnitude only), and zero code
suppression. Three types of zero code suppression (GTE, Bell and "jammed bit
8") are supported and selected on a per-channel basis to provide minimum ones
density control. An internal signaling control stream provides per-channel control
of robbed bit signaling and selection of the signaling source. All channels can be
forced into a trunk conditioning state (idle code substitution and signaling
conditioning) by use of the Master Trunk Conditioning (MTRK) bit in the T1-XBAS
Configuration Register.
A data link is provided for ESF mode. The data link sources include bit oriented
codes and HDLC messages. Support is provided for the transmission of AIS or
Yellow alarm signals for all formats.
The transmitter can be disabled for framing via the FDIS disable bit in the T1/E1
Transmit Framing and Bypass Options register. When transmitting ESF
formatted data, the framing bit, datalink bit, or the CRC-6 bit from the egress
stream can be by-passed to the output data stream via the same T1/E1 Transmit
PROPRIETARY AND CONFIDENTIAL
67
PMC [ PMC-SIERRA, INC ]
