The fully refurbished BT Inspiration telephone system is initially configured for 2 lines and 6 extensions but is expandable by adding cards and modules. Caller display is supported with the Inspiration Featurephone, so you can see the name / number of the incoming caller before you answer. If equipped with ISDN lines you can transfer or divert calls to external numbers. DDI is also supported (requires ISDN) so calls can dial straight to the extension of there choice.

Maximum capacity is 18 extensions and 8 lines.