PM7346 datasheet(96/419 Pages) PMC

96 / 419 page

PM7346 S/UNI-QJET

DATASHEET

PMC-960835

ISSUE 6

SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 75

• inserts the Network Operator (NR) byte from the TDPR block when the

TNETOP bit in the S/UNI-QJET Data Link and FERF Control register is logic

1; otherwise, the NR byte is set to all ones. The NR byte can be overwritten

by using the TOH[x] and TOHINS[x] input pins. All 8 bits of the Network

Operator byte are available for use as a datalink;

• inserts the General Purpose Communication Channel (GC) byte from the

TDPR block when the TNETOP bit in the S/UNI-QJET Data Link and FERF

Control register is logic 0; otherwise, the byte is set to all ones. The GC byte

can be overwritten by using the TOH[x] and TOHINS[x] input pins.

In G.751 E3 mode, the E3-TRAN :

• inserts the Remote Alarm Indication bit (bit 11 of the frame) either via a

• inserts the National Use reserved bit (bit 12 of the frame) either as a fixed

value through a register bit or from the TDPR block as configured by the

TNETOP bit in the S/UNI-QJET Data Link and FERF Control register and the

NATUSE bit in the E3 TRAN Configuration register;

• optionally identifies the tributary justification bits and stuff opportunity bits as

either overhead or payload to SPLT for payload mappings that take

advantage of the full bandwidth.

Further, the E3-TRAN can provide insertion of bit errors in the framing pattern or

in the parity bits, and insertion of single line code violations for diagnostic

purposes. Most of the overhead bits can be overwritten by using the TOH[x] and

TOHINS[x] input pins.

9.15 J2 Transmitter

The J2 Transmitter (J2-TRAN) Block integrates circuitry required to insert the

overhead bits into an J2 bit stream and produce a B8ZS-encoded signal. The

J2-TRAN is directly compatible with the framing format specified in G.704 and

NTT Technical Reference for High-Speed Digital Leased Circuit Services.

The J2-TRAN generates the frame alignment signal and inserts it into the

incoming serial stream. All overhead and status bits in each frame format can be

individually controlled by either register bits or by the transmit overhead stream.

PM7346 Datasheet(PDF) 96 Page - PMC-Sierra, Inc