Dialogic 6.2 manual Bfv API Functions

The Bfv API Functions

Typically, the BSMI is used as one component of a system. Firmware download, for example, is achieved using the call control functions of the Bfv API. Through the Bfv API, you can perform all appropriate configuration and management functions for the Boston series of products.

BSMI is used by the Bfv call control functions to perform call processing. BSMI is a level lower than the Bfv API, providing greater flexibility.

The host communicates with the Brooktrout module through the Control Interface. The host application (referenced as L4) issues BSMI control messages to configure the module or to instruct it to perform a specific action, such as make a call, clear a call, or request the status of an interface. The module-issued BSMI control messages (referenced as L3) inform the host of the status of the interface, call events, or an error condition.

BSMI supports the R2 signaling protocol. Using the BSMI host to module messages, you can:

„Start and stop the R2 protocol on a particular timeslot on an E1 span.

„Block or unblock an idle B-channel (the ISDN channel that handles data).

„Place an outbound call.

„Answer an inbound call.

„Disconnect a call.

„Reject an incoming call.

BSMI module to host messages respond to the host by:

„Starting and stopping the R2 protocol.

„Blocking or unblocking the B-channel.

„Seizing the line for an incoming call.

„Alerting the host and then connecting a call.

„Clearing a request.

„Notifying the host when the remote end phone is ringing.

„Notifying the host when the call is disconnected at the remote end.

„Providing a protocol error or invalid command status message.

November 2009 37