London Testing repairs & maintains all leading manufacturers of audio and video door entry intercom equipment in N4 Finsbury Park . Including Bell Systems, Fermax, Entrotec, Came BPT, Raytel Security Systems, Urmet Domus, Comelit, Acet, Videx, EIS Systems, Bitron, ISM, GDX, Entryphone London and many more. Please contact us on 02084320843 or email info@londontesting.net