TUP service function summary

The TUP service consists of the following functions:

Function

Description

TUPADDRtoASCII

Changes a packed string of digits (appropriate for the information elements that require an address string) to an ASCII string of digits.

TUPASCIItoADDR

Changes an ASCII string of digits (to dial) to a packed structure of digits appropriate for the information elements that require an address string.

TUPConnectReq

Requests the establishment of a circuit switched connection.

TUPConnectResp

Signals the far exchange that an incoming call was answered.

TUPConnectStatusReq

Sends connection status information to the far exchange during the connection establishment phase.

TUPGetApiStats

Retrieves congestion level activity statistics from the TUP service.

TUPReleaseReq

Clears or denies the establishment of a circuit switched connection.

TUPReleaseResp

Responds to a release indication from a far exchange.

TUPRetrieveMessage

Retrieves (and optionally waits for if none is currently available) the next message from the TUP layer.

TUPStatusReq

Sends a global or circuit-specific message to the far exchange.