PEB2256HT datasheet(117/490 Pages) INFINEON

Part #	PEB2256HT

Description	E1/T1/J1 Framer and Line Interface Component for Long and Short Haul Applications

PDF	490 Pages

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Manufacturer	INFINEON [Infineon Technologies AG]

Direct Link	http://www.infineon.com

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FALC56 V1.2

PEB 2256

Functional Description E1

Data Sheet

117

2002-08-27

4.6.5

Single Channel Loop-Back

Each of the 32 time slots can be selected for loop-back from the system PCM input (XDI)

to the system PCM output (RDO). This loop-back is programmed for one time slot at a

time selected by register LOOP. During loop-back, an idle channel code programmed in

For the time slot test, sending sequences of test patterns like a 1-kHz check signal shall

be avoided. Otherwise an increased occurrence of slips in the tested time slot disturbs

testing. These slips do not influence the other time slots and the function of the receive

memory. The usage of a quasi-static test pattern is recommended.

Figure 40

Single Channel Loop-Back (E1)

ITS09747

RDO

XDI

RCLK

RL1

RL2

XL1

XL2

IDLE Code

Framer

Trans.

Framer

Rec.

Store

Elast.

Store

Elast.

MUX

Recovery

Data

Clock +

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