questionText: To ask the Secretary of State for Science, Innovation and Technology, what data her Department holds on the number of silent calls received by emergency services on (a) ISDN and (b) SIP lines.
answerText: The Emergency Services are operationally independent and have responsibility for the operation of emergency service control rooms that process emergency calls, as overseen by local Chief Officer and relevant Lead Government Departments, including Departme...
heading: Emergency Services: Integrated Services Digital Network