What is not a PNNI Signaling Message?

A.
CONNECT

B.
STATUS ENQUIRY

C.
CALL PROCEEDING

D.
DELETING

E.
ALERTING

F.
NOTIFY

Explanation:
PNNI Messages include:
ALERTING, CALL PROCEEDING, CONNECT, SETUP, RELEASE, RELEASE COMPLETE, NOTIFY, STATUS, STATUS ENQUIRY, RESTART, RESTART ACKNOWLEDGE, STATUS, ADD PARTY, ADD PARTY ACKNOWLEDGE, PARTY ALERTING, ADD PARTY REJECT, DROP PARTY, DROP PARTY ACKNOWLEDGE.