W66 blockW110 blockWAerial insertWData access arrangementWDemarcation pointWDigital access carrier systemWDigital enhanced cordless telecommunicationsWDigital loop carrierWEthernet over twisted pairWFiber to the telecom enclosureWFiber to the xWNetwork interface deviceWRemote concentratorWServing area interfaceWSubscriber loop carrierWTelephone line
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