PM4314-RI データシートの表示（PDF） - PMC-Sierra

部品番号

コンポーネント説明

メーカー

PM4314-RI

QUAD T1/E1 LINE INTERFACE DEVICE

PMC-Sierra 

PM4314 QDSX

DATA SHEET

PMC-950857

ISSUE 5

QUAD T1/E1 LINE INTERFACE DEVICE

4 APPLICATION EXAMPLES

Figure 1 - Example 1. T1 or E1 ATM Interfaces

1X Transm it Reference Clock

S C I-P H Y TM

M u lti-P H Y

ATM Cell Bus

PM 7344

S/U NI-M PH

Q uad T1/E1

M u lti- P H Y

User Network Interface

PM 4314

QDSX

Quad T1/E1

Line Interface Device

D S X-1

or

E1

A nalog

In te rfa c e s

G en eric

M icro p ro ce sso r

Bus

Crystal Oscillator 24X Clock

(37.056 MHz for T1 or 49.152 MHz

for E 1) if using jitte r atten ua to r or

XPLS W IDEN function. 8X clock

oth erw ise .

Example 1 shows the PM4314 QDSX used with the PM7344 S/UNI-MPH 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 DS-1 or E1 framing functions are provided by 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.

Jitter attenuation by both the QDSX and the S/UNI-MPH can be performed by

supplying a 24X reference clock to the devices. If jitter attenuation is to be

executed by the S/UNI-MPH only, then an 8X reference clock is required by the

QDSX and a 24X reference clock is required by the S/UNI-MPH. If jitter

attenuation is to be executed by the QDSX, then a 24X reference clock must be

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 8

Share Link: