The TUP service consists of the following functions:
Function |
Description |
Changes a packed string of digits (appropriate for the information elements that require an address string) to an ASCII string of digits. | |
Changes an ASCII string of digits (to dial) to a packed structure of digits appropriate for the information elements that require an address string. | |
Requests the establishment of a circuit switched connection. | |
Signals the far exchange that an incoming call was answered. | |
Sends connection status information to the far exchange during the connection establishment phase. | |
Retrieves congestion level activity statistics from the TUP service. | |
Clears or denies the establishment of a circuit switched connection. | |
Responds to a release indication from a far exchange. | |
Retrieves (and optionally waits for if none is currently available) the next message from the TUP layer. | |
Sends a global or circuit-specific message to the far exchange. |