17.6. Telephone handsets

Any VoIP handset which supports SIP will normally work with the FB2700. Most makes of handset actually allow multiple identities on the handset so it can appear as multiple handsets to one or more phone systems, but a typical installation will not normally need more than on identity per handset.

On the handset you will need to set a registrar and/or proxy which is usually either a host name or an IP address. This will need to refer to the FB2700's address.

The handset will also have some form of login or username and a password. Typically you would use the extension number or DDI as the username, but in an office PABX you may want people's names as the user name.

On the FB2700 you add a telephone configuration object (VoIP users) for each telephone, specifying a username and password. If the handset will need to connect from somewhere that is not on the local network (LAN) then you also need to set local-only to false.

Note

The telephone is identified by the name field matching the SIP request. However, if this is not matched and the telephone has sent a pre-challenge Authorization header to indicate the username it is using then this will be matched instead.

You also need to set the extn and ddi for the phone. Also, in order to make external calls you need to select a carrier to use.

Tip

There are a number of other settings which can be useful. The display-name will show the caller name on internal calls. You can also limit the number of concurrent calls. Some other features are described in corresponding sections below.

The VoIP status page shows the active registrations from handsets.

Tip

The log-register and log-register-debug settings can provide a lot of information about registrations and help diagnose any problems.