Transaction Capabilities User Part

Variations are much greater at the TCAP level; the variations are so great above TCAP that a comparison could only be made in general terms.

While ITU [82–86] uses the term "message types," ANSI [3] uses the term "package types." ANSI TCAP has seven messages, as opposed to ITU-T TCAP's five. ITU-T TCAP does not have the concept of permission.

Table J-1 shows the comparable messages used in the two protocols.

Table J-1. ANSI and ITU TCAP Messages

ANSI "Package Types"	ITU-T "Message Types"
Unidirectional	Unidirectional
Query with Permission	Begin
Query without Permission
Response	End
Conversation with Permission	Continue
Conversation without Permission
Abort	Abort