| Platform SDK: TAPI |
After address assignment, TAPI assigns address identifiers to the addresses. An address identifier is a number between 0 and the number of addresses on the line minus one. An address identifier is a permanent number assigned to a given device and remains constant even across operating system upgrades. The combination of device identifier and address identifier uniquely identifies a given address.
A TAPI 2 application obtains an address identifier (and the device identifier) during a call to lineMakeCall or lineGetCallInfo, in the LINECALLINFO structure, or in a call to lineGetAddressID.
In TAPI 3, the ITAddressCapabilities::get_AddressCapability called AddressCap set to the AC_ADDRESSID member of ADDRESS_CAPABILITY will return with the plCapability parameter set to the current address ID.