Dependencies and critical functions

For example, when the fault tolerance of a telecommunication network is critical, it can be further improved by procuring basic network services through several routes and through several service providers.

Power and communication cables that either move data themselves or support data transmission services are protected from damage, eavesdropping and interference.

The safety of cabling should take into account e.g. the following points:

• communication lines should, as far as possible, be underground or otherwise adequately protected
• electrical cables should be insulated from telecommunication cables to avoid interference
• use of armored cables, electromagnetic shielding or technical raking in very critical places