Huawei OptiX OSN 3500 Routine Maintenance page 36
Optical network curriculum development section
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Also See for OptiX OSN 3500:
- Quick installation manual (81 pages) ,
- Quick installation manual (48 pages)
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Hardware loopback of PDH interface
Hardware loopback is generally inloop
Two positions: wiring area of subrack and DDF
Software loopback of PDH interface
The software loopback of PDH interface means to set outloop or
inloop for PDH interface via NMS
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Tributary
Loopback of PDH interface
SDH NE equipment
Inloop Non-loopback Outloop
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