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- Proudly Presents
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- The MCI Telecommunications Glossary
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- Part II: Acronyms
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- Typed and edited by Knight Lightning
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- - A -
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- ACD Automatic Call Distributor
- AIOD Automatic Identification of Outward Dialing
- ANI Automatic Number Identification
- ARS Automatic Route Selection
- ASCII American Standard Code for Information Interchange
- ATB All Trunks Busy
- AVD Alternate Voice Data
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- - B -
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- BOC Bell Operating Company
- BSOC Bell System Operating Company
- BPS Bits Per Second
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- - C -
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- CCIS Common Channel Interoffice Signaling
- CCSA Common Control Switching Arrangement
- CO Central Office
- COAM Customer Owned And Maintained
- COS Class Of Service
- CPE Customer Premise Equipment
- CPH Cost Per Hour
- CPM Cost Per Minute
- CPU Central Processing Unit
- CRT Cathode Ray Tube
- CU Control Unit
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- - D -
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- dB Decibel
- DCTS Dimension Custom Telephone Service
- DDD Direct Distance Dialing
- DID Direct Inward Dialing
- DM Delta Modulation
- DTMF Dual Tone Multi-Frequency
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- - E -
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- EDP Electronic Data Processing
- EEHO Either End Hop Off
- EKTS Electronic Key Telephone Set
- EML Expected Measured Loss
- ENFIA Exchange Network Facilities for Interstate Access
- EPROM Erasable Programmable Read Only Memory
- EPSCS Enhanced Private Switched Communication Service
- ERL Echo Return Loss
- ETN Electronic Tandem Network
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- - F -
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- FCC Federal Communications Commission
- FDM Frequency Division Multiplex
- FX Foreign Exchange
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- - H -
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- HEHO Head End Hop Off
- Hz Hertz
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- - I -
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- IMT Inter-Machine Trunk
- IOT Inter-Office Trunk
- IRC International Record Carrier
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- - L -
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- LAN Local Area Network
- LATA Local Access and Transport Area
- LCR Least Cost Routing
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- - M -
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- MDF Main Distribution Frame
- MERS Most Economical Route Selection
- MG Mastergroup
- MOS Metal-Oxide Semiconductor
- MTS Message Telephone Service
- MU Message Unit
- M/W Microwave
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- - N -
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- NPA Numbering Plan Area
- NNX Numbering Network Exchange
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- - O -
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- OCC Other Common Carrier
- ONAL Off Network Access Line
- OPX Off-Premise Extension
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- - P -
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- PABX Private Automatic Branch Exchange
- PBX Private Branch Exchange
- PCM Pulse Code Modulation
- POTS Plain Old Telephone Service
- PROM Programmable Read-Only Memory
- PSC Public Service Commission
- PSN Public Switched Network
- PTT Postal Telephone and Telegraph
- PUC Public Utility Commision
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- - R -
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- RAM Random Access Memory
- RCC Radio Common Carrier
- ROM Read-Only Memory
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- - S -
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- SCC Specialized Common Carrier
- SG Supergroup
- SMDR Station Message Detail Recording
- SMG Supermastergroup
- SPC Stored Program Control
- SSB Single Sideband Radio
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- - T -
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- TEHO Tail End Hop Off
- TDM Time Division Multiplex
- TMRS Traffic Measurement and Recording system
- TSPS Traffic Service Position System
- TT Trunk Type
- TTTN Tandem Tie Trunk network
- TUR Trunk Utilization Report
- TWX Teletypewriter Exchange Service
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- - U -
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- UCD Uniform Call Distributor
- USOC Uniform Service Order Code
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- - V -
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- VANS Value - Added Network Service
- VP Voice Frequency
- VGF Voice Grade Facility
- VNL Via Net Loss
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- - W -
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- WATS Wide Area Telecommunications Service
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- This concludes The MCI Telecommunications Glossary. Look for more G-philes on
- MCI by Knight Lightning coming soon to Metal Shop.
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- This has been a 2600 Club production
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- Thanx to Taran King
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