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Telecommunications Industry Association , 07/01/1995
Publisher: TIA
File Format: PDF
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INTRODUCTION
General Description
Service Option 4 provides asynchronous (abbreviated as "async" hereafter) data transmission capability on TIA/EIA/IS-95-A wideband spread-spectrum cellular systems using the protocols and procedures defined herein. Service Option 5 provides Group-3 facsimile (abbreviated as "fax" hereafter) transmission capability for these systems.
These two Service Options are defined in a single standard because their user interfaces and associated call control procedures are similar. This parallels the current trend in analog modems, which commonly provide both fax and async data services through the same modem unit.
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