Mitel SX-50 User Manual page 32

OUTSIDE CALLS/EXTENSION ASSISTANCE
THE EXTENSION USER WISHES TO DIAL THE NUMBER AFTER YOU HAVE
SEIZED THE TRUNK FOR HIM/HER
With the extension on hold
l
Dial the trunk access code (see NOTE below)
l
Press RELEASE
The extension user can now complete the number.
Note: If the Automatic Route Selection feature is enabled on the
system, your Communications Department will let you know the
exact number of digits you will have to dial after the external
access code in order to seize a trunk.
Basic Call Handling 2-13