SIP supports the nccQueryCapability function call. The capability mask indicates support of the following capabilities:
NCC_CAP_ACCEPT_CALL
NCC_CAP_EXTENDED_CALL_STATUS
NCC_CAP_SEND_LINE_MESSAGE
NCC_CAP_DISCONNECT_IN_ANY_STATE
NCC_CAP_CALLER_ID
NCC_CAP_REGISTER_USER
NCC_CAP_ACKNOWLEDGE_CALL
Refer to the NCC Service Developer's Reference Manual for information about the first five mnemonic capabilities in the previous list. The SIP-specific mnemonic capabilities are described in the following table:
Mnemonic |
If the bit is set... |
NCC_CAP_REGISTER_USER |
The SIP stack is capable of registering a user with a SIP registrar. For more information, refer to Registering a user. |
NCC_CAP_ACKNOWLEDGE_CALL |
The NCC API call nccAcknowledgeCall is enabled. For more information, refer to Acknowledging a call. |