9.2.  One-Way ADSI

One-way ADSI support enables Dialogic boards to be used as ADSI servers and to support ADSI features such as visual Voice Mail. One-way ADSI allows for the one-way transmission of data from a server to a Customer Premises Equipment (CPE) device, such as a display-based telephone. The phone (CPE) sends dual tone multi-frequency (DTMF) messages to the server, indicating whether the data was received successfully.

NOTE:

For a more detailed description of the one-way ADSI data transfer process, see Section 9.5.  Developing ADSI Applications.

ADSI data can be transferred only to display-based telephones that are ADSI compliant. (Check with your telephone manufacturer to find out if your telephone is a true ADSI-compliant device.) An ADSI alert tone, referred to as a CAS (CPE Alerting Signal), is sent by the Dialogic server to query a CPE device, such as an ADSI display phone. The device responds appropriately and, if the device is ADSI-compliant, the ADSI data transfer is initiated.

NOTE:

ADSI-compliant phones are also referred to as "Type 3 CPE Devices" by Bellcore and by the Electronic Industry Association/Telecommunications Industry Association (EIA/TIA).

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