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Hyperlinkhttp://www.infocellar.com/networks/SONET … SDH/sdh-acrterms.htm
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Linked FromAU - Administrative Unit 
TU - transport unit 
TU - Tributary Unit 
TUG - Tributary Unit Group 
REI - Remote Error Indication 
Suggested1/7/2009 5:07:00 PM
Updated2/26/2009 4:22:00 PM