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Automatic message accounting

Automatic message accounting (AMA) provides detailed accounting for telephone calls. When direct distance dialing (DDD) was introduced in the US, message registers no longer sufficed for dialed telephone calls. The need to record the time and phone number of each long-distance call was met by electromechanical data processing equipment.

Centralized AMA, Billing automatic message format & Message register

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Centralized AMA

Local AMA

Billing automatic message format

Message register

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Automatic message accounting

Nodes37
Edges36
Triples0
Avg. degree1.95
Density0.054054
Components1

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Important terminology

ama message accounting baf call number telephone calls billing data local automatic office format rate 3gpp time equipment recorded system

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