PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
6
DESCRIPTION
The PM7346 S/UNI-QJET is a quad ATM physical layer processor with integrated
DS3, E3, and J2 framers. PLCP sublayer DS1, DS3, E1, and E3 processing is
supported as is ATM cell delineation.
The S/UNI-QJET contains integral DS3 framers, which provide DS3 framing and
error accumulation in accordance with ANSI T1.107, and T1.107a, integral E3
framers, which provide E3 framing in accordance with ITU-T Recommendations
G.832 and G.751, and integral J2 framers, which provide J2 framing in
accordance with ITU-T Recommendation G.704 and I.432.
When configured for DS3 transmission system sublayer processing, the
S/UNI-QJET accepts and outputs both digital B3ZS-encoded bipolar and
unipolar signals compatible with M23 and C-bit parity applications.
When configured for E3 transmission system sublayer processing, the
S/UNI-QJET accepts and outputs both HDB3-encoded bipolar and unipolar
signals compatible with G.751 and G.832 applications.
When configured for J2 transmission system sublayer processing, the
S/UNI-QJET accepts and outputs both B8ZS-encoded bipolar and unipolar
signals compliant with G.704 and NTT 6.312 Mbit/s applications.
When configured for DS1, or E1 transmission system sublayer processing, the
S/UNI-QJET accepts and outputs unipolar signals with appropriate clock and
frame pulse signals for physical sublayer processing. When configured for other
transmission systems, the S/UNI-QJET provides a generic interface for physical
sublayer processing.
In the DS3 receive direction, the S/UNI-QJET frames to DS3 signals with a
maximum average reframe time of 1.5 ms and detects line code violations, loss
of signal, framing bit errors, parity errors, path parity errors, AIS, far end receive
failure and idle code. The DS3 overhead bits are extracted and presented on
serial outputs. When in C-bit parity mode, the Path Maintenance Data Link and
the Far End Alarm and Control (FEAC) channels are extracted. HDLC receivers
are provided for Path Maintenance Data Link support. In addition, valid bit-
oriented codes in the FEAC channels are detected and are available through the
microprocessor port.
In the E3 receive direction, the S/UNI-QJET frames to G.751 and G.832 E3
signals with a maximum average reframe times of 135µs for G.751 frames and
250µs for G.832 frames. Line code violations, loss of signal, framing bit errors,
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 16
PMC [ PMC-SIERRA, INC ]
