PM6341 E1XC
DATA SHEET
PMC-910419
ISSUE 8
E1 FRAMER/TRANSCEIVER
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DESCRIPTION
The PM6341 E1 Framer/Transceiver (E1XC) is a feature-rich device suitable for
use in many E1 systems (such as CSU, DSU, CH BANK, MUX, DPBX, DACS,
and ESDX) with a minimum of external circuitry. The E1XC is software
configurable, allowing feature selection without changes to external wiring.
On the receive side, the E1XC recovers clock and data and can be configured to
frame to a basic G.704 2048 kbit/s signal or also frame to the signalling
multiframe alignment signal and the CRC multiframe alignment signal.
Analog circuitry is provided to allow direct reception of a G.703 2048 kbit/s signal
with up to 6 dB of loss by using only an external transformer and passive
components.
The E1XC also supports detection of various alarm conditions such as loss of
signal, loss of frame, loss of signalling multiframe, loss of CRC multiframe, and
reception of remote alarm signal, remote multiframe alarm signal, alarm
indication signal, and timeslot 16 alarm indication signal. The E1XC detects and
indicates the presence of remote alarm and AIS patterns and also integrates red
and AIS alarms as per industry specifications.
Performance monitoring with accumulation of CRC-4 errors, far end block errors,
framing bit errors, and line code violation is provided. The E1XC also detects
and terminates HDLC messages on a data link. The data link may be extracted
from timeslot 16 and used for common channel signalling or may be extracted
from the national bits.
An elastic store for slip buffering and adaptation to backplane timing is provided,
as is a channel associated signalling extractor that supports signalling debounce,
signalling freezing, idle code substitution, and data inversion on a per-timeslot
basis. Receive side data and signalling trunk conditioning is also provided.
On the transmit side, the E1XC generates framing for a basic G.704 2048 kbit/s
signal, or framing can be optionally disabled. The signalling multiframe alignment
signal may be optionally inserted and the CRC multiframe structure may be
optionally inserted.
Internal analog circuitry allows direct transmission of a G.703 2048 kbit/s signal
into either a 75 Ω or 120 Ω line using only an external transformer.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
