Free telephone services are available on broadband

An example is Skype (download and install free ?).

Another example is Logitech  (cameras / microphones also compatible with Skype).
Please note that this video communication facility is NOT free.

Using these services requires the other 'party' to have installed a similar program but on-line payment facilities are available to enable 'dial up' to 'conventional' landline or mobile telephones.

A microphone is required and the built in speakers can be used.
Alternatively 'hand sets' similar to conventional telephones are available.

A camera or combined camera / microphone enables video and audio communication with friends and relatives.