Mitel OfficeConnect User Reference Manual page 17

Final
3
The system dials the number and displays a "Calling" message along with
the caller ID.
4
When the third party answers the call, the Information Area Display
updates with the caller ID.
5 Press the CONF softkey again. The 3-Way Call is now activated.
Notes: Until the CONF softkey is pressed a second time, the first party
will remain on hold and you can talk with the second party privately.
By putting a 3-Way Call on hold, the other parties can continue talking.
You can use the
key you must press twice to activate a 3-way call or you will initiate a
transfer instead.
If you want the option to leave the conference and leave the two parties
connected (when both parties are external), you must have the
permission Redirect Inbound Call to External Number enabled.
Once the 3-Way Call is established, you can use the transfer feature to
transfer both parties to another party.
Joining two calls on the 5330/5340 phone
The 3-way call feature allows you to conference together two calls on your
phone's Line appearances. To activate a 3-way call in these circumstances,
follow these steps:
1 While on an active call, press the CONF softkey.
2
Select the Line Appearance of the person on hold that is to be connected.
3 Press the CONF softkey again. The 3-Way Call is now activated.
Account codes on the 5330/5340 phone
Users can enter account codes against incoming and outgoing calls to
associate those calls with a particular client or account. Once entered,
account codes are logged in the call records kept by your service provider and
can be provided to you on request. Your administrator can enable and disable
the Account Code feature for your business and specify the minimum and
maximum valid account code length.
To use the Account Code feature, a user must have a memory key
programmed with the Account Code feature or be using a phone key
profile that has been programmed with the Account Code feature.
key instead of the CONF softkey. When using this
Using the phone system 11