V.25bis Features

V.25bis is a ITU-T specification for a modem command language and overall modem behavior. It includes both asynchronous and synchronous command interfaces.

Hayes includes V.25bis in its ULTRA modems to support synchronous out-dial facilities of host computers and to support the evolution of synchronous communications software on PCs.

This section describes the Hayes implementation of V.25bis and how it interacts with the Hayes Standard AT Command Set. Click on the following topics for more information:

Mode Selection

Switching Modes Via Software

Software Switching Scenarios

Interface Cable

Stored Profiles

V.25bis Options

V.25bis Commands

V.25bis Indications

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