9.4.  The ADSI Protocol

ADSI is a superset of the Caller ID and Call Waiting functions. ADSI is built on the same protocol as Caller ID and shares the same ADSI Data Message Format (ADMF). The ADSI protocol requires a Bell 202/V.23 1200 bps FSK-based modem for data transmission.

The ADSI protocol consists of three defined layers, as follows:

• Message Assembly Layer - assembles the body of the ADMF message
• Data Link Layer - generates the checksum, which is used to for error detection, and sends it to the driver
• Physical Layer - transports the composite message via the modem to the CPE on a transparent (bit-for-bit) basis

NOTES:

1. Dialogic provides only the Physical Layer and a portion of the Data Link Layer of the ADSI protocol. The user is responsible for creating the ADSI messages and the corresponding checksums.

2. The ADSI data must conform to interface requirements described in Bellcore Technical Reference GR-30-CORE, Voiceband Data Transmission Interface Generic Requirements. For information about message requirements (how the data should be displayed on the CPE), see Bellcore Technical Reference TR-NWT-001273, Generic Requirements for and SPCS to Customer Premises Equipment Data Interface for Analog Display Services. These technical references can be obtained from Bellcore by calling 1-800-521-CORE.

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