PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
6
DESCRIPTION
The PM7344 SATURN Quad T1/E1 Multi-PHY User Network Interface (S/UNI-
MPH) is a monolithic integrated circuit that implements the T1/E1 processing and
ATM mapping functions for four 1.544 Mbit/s or 2.048 Mbit/s ATM User Network
Interfaces. It can also be used in conjunction with external framing devices, to
implement ATM user network interfaces for other bit rates. For example, a quad
J2 (6.312 Mbit/s) interface can be realized with four external J2 framers and a
single S/UNI-MPH. It is fully compliant with both ANSI and ITU requirements and
ATM Forum UNI specifications. The S/UNI-MPH is software configurable,
allowing feature selection without changes to external wiring.
On the receive side, when configured for T1 processing, the S/UNI-MPH
recovers clock and data and can be configured to frame to either of the common
DS-1 signal formats; SF or ESF. Clock recovery may also be bypassed. The
S/UNI-MPH also supports detection of various alarm conditions such as loss of
signal, pulse density violation, red alarm, yellow alarm, and AIS alarm. The
S/UNI-MPH detects and indicates the presence of yellow and AIS patterns and
also integrates yellow, red, and AIS alarms as per industry specifications.
Performance monitoring with accumulation of CRC-6 errors, framing bit errors,
line code violations, and loss of frame events is provided. The S/UNI-MPH also
detects the presence of in-band loopback codes, ESF bit oriented codes, and
detects and terminates HDLC messages on the ESF data link.
On the receive side, when configured for E1 processing, the S/UNI-MPH
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. Clock recovery may also be bypassed.
The S/UNI-MPH 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 S/UNI-MPH
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 S/UNI-MPH also
detects and terminates HDLC messages on a data link. The data link may be
extracted from timeslot 16 or may be extracted from the national bits.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
