Figure 65: MMI Local loopback test
Test 2, external loopback, applies an external loopback to the E1 link. Test data is generated
and received by the LEI on all timeslots. If test 1 passes but test 2 fails, it indicates that the E1
link is defective between the LEI and the external loopback location. If test 1 was not run and
test 2 fails, the E1 link or the LEI could be defective. To isolate the failure to the E1 link, tests
1 and 2 must be run in tandem.
Figure 66: MMI External loopback test
demonstrates how an external loopback is applied to the E1 link.
Figure 66: MMI External loopback test
Test 3, network loopback, loops the LEI's received E1 data back toward the CPE. No test data
is generated or received by the LEI. If test 2 passes but test 3 fails, it indicates that the CPE
device is defective. If test 2 was not run and test 3 fails, the E1 link or the CPE device could
be defective. To isolate the failure to the CPE device, tests 2 and 3 must be run in tandem.
Figure 67: MMI Network loopback test
on page 241 illustrates how the signaling is looped
back toward the CPE.
Figure 67: MMI Network loopback test
Man-Machine E1 maintenance interface software
Circuit Card Reference
July 2011 241
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 143: ...Figure 25 CP PIV card front Physical description Circuit Card Reference July 2011 143 ...
Page 148: ...NT4N39AA CP Pentium IV Card 148 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
Page 302: ...NT5K21 XMFC MFE card 302 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 346: ...NT6D80 MSDL card 346 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 353: ...Figure 96 NTDK16 DLC Functional description Circuit Card Reference July 2011 353 ...
Page 461: ...Figure 147 Paging trunk operation Applications Circuit Card Reference July 2011 461 ...
Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 550: ...NTBK22 MISP card 550 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 560: ...NTBK50 2 0 Mb PRI card 560 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 595: ...Figure 165 MGC block diagram Introduction Circuit Card Reference July 2011 595 ...
Page 662: ...NTRB21 DTI PRI DCH TMDI card 662 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 668: ...NTVQ01xx Media Card 668 Circuit Card Reference July 2011 Comments infodev avaya com ...
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