Assuming that the CA just discovered is a TCA within an IOU, software can then issue a DevMgtGet(IOUnitInfo) GMP (Device Management read of the IOUnitInfo attribute) to discover the number of slots that exists in the IOU and which ones are currently occupied by IOCs.
This is accomplished by reading the IOControllerProfile.ServiceEntries attribute for each of the IOCs that are present.
This is accomplished by reading the ServiceEntries attribute for each of the IOCs that are present. This attribute consists of a list of all the services provided by the respective IOC. Each entry contains:
As will be seen later in this chapter, the ServiceID of the service to establish a communications channel with is supplied to the remote CA during the connection establishment process.