Extensions are associated with the phones on the systems and allow to connect to our systems servers to allow to be registered.

They are each given a unique 'Username' and a secure 'Secret' or a password to register.

They are used to add to DID's for direct dials or other settings such as queues, if you'd like to find out more information on DID's click here.

Under 'System' and then 'Extensions' on the PBX you can find information such as the 'Name' of the user device is registered to, the number of the extension (for which you can dial locally if you are connected to the same PBX) you can also check is the status of the extension is active or disabled.

Firstly, click advanced options on the right hand side of the screen.

If we scroll down, we have voicemail; these mailboxes are created by default for every user.

We can set an email address for each extension and select the attach box. This means that when this extension is left a voicemail it will send an email stating the mailbox has received a message and also attach the message as a .wav file.

Next, we have the deleted-after-email selection. This will email the message to the email specified, and then delete from the mailbox.

Next down the list is say caller ID, this announces the extension number from which the voice message has been recorded.

Review mode allows the caller to listen to the voice message before sending the message to the mailbox.

Allow operator gives the caller the option to press a specified key, they will be forwarded on to an alternative member of staff rather than leaving a message.

The envelope message announces the date and time as well as the extension number from which the message was recorded.

Hide from directory allows the user to hide their extension from the directory.

Rings to answer specifies the number of rings before the call is forwarded to voicemail.

Voicemail delay states how long to pause in seconds, before asking the user’s voicemail PIN.

To the left of Voicemail is Caller ID. In the Caller ID fields, you can change the name and number displayed on the dialled party’s phone display.

Caller ID presentation is sent by the extension. There are many options here; the most used is ‘Number Unavailable’ which hides the number from the person you are calling.

When you set the option to hide the Caller ID for Anonymous calls to yes, incoming calls will display anonymous as your caller ID.

If we scroll down some more, we can see the call properties and more specifically, the ring time. This is measured in seconds and specifies how long the phone will ring for before diverting.

Under Call Properties, we have call groups and pickup groups. This states who can pick up calls from another phone. If two extensions are in the same call group and pickup group they can pickup each other’s calls by calling *8.