PM7344 datasheet(26/293 Pages) PMC

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PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

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

APPLICATION EXAMPLES

Figure 1

- Example 1. T1 or E1 Multi-PHY ATM UNI

PM7344

S/UNI-MPH

PM4314

QDSX

SCI-PHYTM

Multi-PHY

ATM Cell Bus

Generic

Microprocessor

Bus

DSX-1

Analog

Interfaces

Crystal Oscillator Clock

37.056 MHz

Or 12.352 MHz

1.544 MHz Transmit Reference Clock

Quad T1/E1

Multi-PHY

User Network Interface

Quad DSX-1/E1

Analog Line Interface

Example 1 shows the PM7344 S/UNI-MPH used with the PM4314 QDSX to

implement a quad T1/E1 UNI where the DS1 or E1 signals are presented on

DSX-1 or E1 electrical interfaces.

In this example, the DSX-1 or E1 line interface functions are provided by the

QDSX and the DS1 or E1 framing functions are provided by the S/UNI-MPH.

Note that many other standard DSX-1 or E1 line interface devices are also

compatible with the S/UNI-MPH. The S/UNI-MPH also provides the ATM cell

processing functions associated with the PHY layer, including the implementation

of a SCI-PHY multi-PHY interface to the ATM layer device(s). The combination

of the QDSX device with the S/UNI-MPH allows both ANSI/ITU compliant DSX-

1/E1 analog signals and ATM Forum UNI 3.1 and ITU G.804 compliant DS1/E1

digital signals to be processed. The UNI 3.1 and G.804 specifications define

ATM cell mappings for a variety of transmission formats, including the 1.544

Mbit/s DS1 and the 2.048 Mbit/s E1 formats.

PM7344 Datasheet(PDF) 26 Page - PMC-Sierra, Inc

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