IP113MLF-DS-R01 datasheet(22/58 Pages) ETC2

22 / 58 page

IP113M LF

Preliminary Data Sheet

22/58

April 9, 2007

IP113M LF-DS-R11

Loop back test (continued)

2.4.3

Programming procedure for In-band loop back test

Step

Description

C3~C2

C15~C8

Note

Set local IP113M LF TP receive disabled

Set Reg. 20.14 off

Set remote T2 timer disabled by

maintenance frame

11 11 11 11

Reg24 and Reg 25

Set remote IP113M LF to be loop back

mode enabled by maintenance frame

00 00 00 01

TS-1000: loop

back set

Remote IP113M LF sends back loop back

acknowledge

Send loop back test maintenance frame

11 01 10 11

Reg24 and Reg 25

Remote IP113M LF send back

acknowledge

Local IP113M LF stores the loop back

maintenance to Reg. 26~30 and checks

CRC bit is in Reg. 26.12

Repeat step 4~6 continuously

Set remote IP113M LF to be loop back

mode disable by maintenance frame

00 00 00 00

TC-1000: loop

back end

Remote IP113M LF sends back loop back

acknowledge

Set local IP113M LF TP receive enable

Set Reg. 20.14 on

2.4.4

Auto in-band loop back test

Step

Description

Set pin AUTO_TEST to “1” (The following step is executed automatically by IP113M LF)

1.1

Central IP113M LF sends loop back start request to remote IP113M LF and goes to CST2

state.

1.2

Remote IP113M LF sends loop back start acknowledge to Central IP113M LF and enters loop

back test mode.

1.3

Central IP113M LF goes to CST1 state and begins sending 15 frames in 64 bytes.

1.4

Remote IP113M LF loops back the received frames at the TP port’s PMD sub-layer.

1.5

Central IP113M LF checks the loop back frames and reports the result.

The LED pin LED_RMT_TP_LINK is Flash (on 80ms / off 20ms) during the auto loop back test

period (AUTO_TEST is “1”).

The LED pin LED_RMT_TP_SPD indicates the loop back test complete (on) (when

AUTO_TEST is “1”). The LED pin LED_RMT_TP_FDX indicates the loop back test ok (on)

(when AUTO_TEST is “1”)

If another auto loop back test is needed, set AUTO_TEST to “0” and then “1”. That is,

AUTO_TEST is triggered whenever there is a low-to-high transition on this pin.

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