MTTR (Mean Time To Repair)

An indicator of the performance of service personnel based on the

known elapsed period of time required to perform corrective maintenance and restore a component or system to operational status.

• attenuator
• ATU-C (ADSL Transmission Unit-Centralized)
• ATU-R (ADSL Transmission Unit-Remote)
• audio
• audio
• Audio Messaging Interchange Specification (AMIS)
• Audio Messaging Interchange Specification (AMIS)
• audiotex
• audiotext
• AUI (Attachment Unit Interface)
• authentication
• authorization
• authorization code
• auto dialer (automatic dialer)
• automated attendant
• automatic callback
• automatic call distributor (ACD)
• automatic line selection
• automatic number identification (ANI)
• Automatic Protection Switching (APS)
• automatic repeat request (ARQ)
• automatic route selection (ARS)
• automatic set relocation
• Autonomous System (AS)
• available bit rate (ABR)