NEC SL2100 Features And Specifications Manual page 193

ISSUE 1.0
To busy out a trunk from outbound usage:
1. Press Speaker key + dial 645 + Trunk Number (001~128) + 1.
The user which busied out the trunk still has access to it. All other users are blocked from seizing it to
place an outgoing call. The trunk, however, can still be answered by any user programmed with the
trunk access.
To Remove a Trunk from a Busied Out State:
1. Press Speaker key + dial 645 + Trunk Number (001~128) + 0.
Features and Specifications Manual
SL2100
C
1-179