Telecom is a sea of acronyms and industry specific terms, a guide is helpful.

• 911
• ACD: Automatic Call Distribution
• ALOC: Average Length of Call (sometimes ACD — Average Call Duration)
• ANAC: Automatic Number Announcement Circuit
• ANI: Automatic Number Identification
• ASR: Answer Seizure Ratio — (successfull calls / total calls) * 100
• BRI
• CALEA
• CENTREX
• Channelbank
• CIC: Carrier Identification Codes
• CLEC
• CPC
• CTI: Computer Telephony Integration
• DID: Direct Inward Dialing Number
• DNIS: Dialed Number Identification Service
• E1
• E&M
• FXO: Foreign Exchange Office - describes a type of phone interface
• FXS: Foreign eXchange Station - describes a type of phone interface
• ISDN: Integrated Services Digital Network
• ITSP: Internet Telephony Service Provider
• IVR: Interactive Voice Response
• LATA
• LNP: Local Number Portability
• MWI
• NEBS
• NPA-NXX
• Numbering plans
• PBX: Private Branch Exchange
• PDD: Post Dialing Delay. Time between the start of a call and the time the phone starts ringing.
• POTS: Plain Old Telephone Service
• PRI
• PSAP
• PSTN: Public Switched Telephone Network
• QSIG
• REN
• SIP: Session Initiation Protocol - the main VOIP protocol
• SS7
• T1
• V and H Coordinates
• VB: Voice broadcasting
• VBS: Voice broadcast services

See Also

• whatis.com
• FOLDOC Free Online Dictionary of Computing
• Acronym Finder
• TeleWiki

Printed

• AmazonNewton's Telecom Dictionary{/book} The most frequently seen book on Telecom Industry bookshelves.