PEB2256HT datasheet(185/490 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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185 / 490 page

FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

185

2002-08-27

5.6.5

Single Channel Loop-Back (loop-back of time slots)

The channel loop-back is selected by LOOP.ECLB = 1.

Each of the 24 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

should 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 75

Channel Loop-Back (T1/J1)

ITS09747

RDO

XDI

RCLK

RL1

RL2

XL1

XL2

IDLE Code

Framer

Trans.

Framer

Rec.

Store

Elast.

Store

Elast.

MUX

Recovery

Data

Clock +

PEB2256HT Datasheet(PDF) 185 Page - Infineon Technologies AG