NEC Univerge SV8300 Manual page 32

Malicious Call Trace
6. If you go on-hook after sending an MCT request but before receiving the MCT result, a Disconnect REQ is
sent to the network.
7. At the time of tandem termination from the ISDN to CCIS, MCT can be used by a terminating extension
(Multiline Terminal, SLT) or an attendant console through CCIS.
Page 24
UNIVERGE SV8300 Features and Specifications Manual (ISDN/Q-SIG)
NWA-033632-001, Issue 1