Abbreviated dialing
Agent features
Alert calling
Attendant
Authority code
Auto answer
Auto hold
Auto line selection
Auto transfer
Call forwarding
Call parking
Call pickup
Call transfer
Callback
Camp- on
Class-Of-Service
Conferencing
DISA
Distinctive ring
Do Not Disturb
Drop timeout
Exchange lines
External loud bell
External paging
Feature check
Feature codes
Forced Account Code
Forced call diversion
Group listen
Headset mode
Hold
Hot keypad
Hotline
Least Cost Routing
Lock / Unlock
Look-up
Messages
Music-on-hold
Mute
Names
No-ring transfer
Numbering plan
Off-hook Voice-Announce
Paging
Power-fail telephones
Private-to
Re-dialling
Reminder service
Service modes
SMDR
Tenant groups
Toll Restriction
U.C.D.
Virtual numbers

This feature utilises directory numbers (with or without a physical connection) in combination with the "no-ring transfer" feature. Calls can be parked at an extension directory number and picked-up using the "directed call pickup" feature.

Programming a pair of feature keys for No-ring Transfer (function 73) and for Directed Call Pickup (function 53) and a series of feature keys for "parking positions" (using virtual numbers) allows the user to hold calls by parking them and retrieve the calls in any order they want to.