Reasons for a Connection to Fail

If for any reason the server determines that a new session must not be opened, it responds to the OPEN_REQ message with a FAILURE_CONF message.

The following are some of the reasons a new session might not be opened:

• If required floating data has not been provided, a FAILURE_CONF message, defined in FAILURE_CONF, is returned with the status code set to E_CTI_REQUIRED_DATA_MISSING.

• If a client attempts to open a session for CLIENT EVENTS service (that is when the client is in Agent Mode — see Two Client Modes for Connecting with Unified CCX) and the provided IP phone information items are not consistent with each other, a FAILURE_CONF message is returned with the status code set to E_CTI_INCONSISTENT_AGENT_DATA.

• If the indicated IP phone is already associated with a different client, the server refuses to open the new session and returns a FAILURE_CONF message with the status code set to E_CTI_DEVICE_IN_USE.

• If a connection is made to the non-master server, the server will reply with a FAILURE_CONF indicating error E_CTI_SERVER_NOT_MASTER.