Community Alarm and Mobile Warden Service which provides telephone equipment to enable vulnerable people to contact assistance when in difficulty.  The service uses a special telephone with an alarm button and portable radio trigger which are installed in the persons home.  In the case of an accident or emergency, the calls are automatically put through to a control centre which is staffed 24 hours a day.  Particularly appropriate for frail older people, people with disabilities and people subject to harassment.  Subscribers pay an initial installation fee and a weekly charge and are responsible for their own telephone costs.  Equipment may be free to people on housing benefit.