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Section 470 - TSAPI Programmer's Guide
Service Parameters:
Ack Parameters:
Nak Parameter:
Notes:
Transfer Call Service
This service provides the transfer of a heldCall (C1-D1) with an activeCall (C2-D1) at the
same device (D1). The transfer service merges two calls (C1, C2) with connections (C3-D2,
C3-D3) at a single common device (D1) into one call (C3). Also, both of the connections to
the common device become Null and their connectionIDs are released. When the transfer
completes, the common device (D1) is released from the calls (C1, C2). A callID, newCall
(C3), that specifies the resulting new call for the transferred call is provided.
DBS-92-470
heldCall
noData
universalFailure
•
INVALID_CSTA_CONNECTION_IDENTIFIER (13)
The connectionID contained in the request is invalid.
•
NO_ACTIVE_CALL (24)
The specified call at the station is cleared so it cannot be retrieved.
•
NO_HELD_CALL (25)
The specified connection at the station is not in the held state (e.g., alerting state) so it
cannot be retrieved.
•
RESOURCE_OUT_OF_SERVICE (34)
The DBS is not on-line.
•
OUTSTANDING_REQUEST_LIMIT_EXCEEDED (44)
The application has a pending CSTA request.
•
GENERIC_UNSPECIFIED (0)
Internal driver error.
•
If the user is listening to dial tone while a request for Retrieve Call Service is
received, the dial tone will be dropped and the user reconnected to the held call.
Issued April 2000
[mandatory] a valid connection identifier indicates the
endpoint to be connected. The deviceID in heldCall must
contain the station extension of the endpoint.
None for this service.
13
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