S 2.28 Availability of external telecommunications advisory services

Initiation responsibility: Head of IT Section; IT Security Management; PBX officer

Implementation responsibility: -

In order to be able to make quick use of expert assistance, consideration should, already at the time of the purchase or renting of a PBX facility, be given to the provision of appropriate advisory services. An important requirement is for assistance to be rendered promptly in an emergency since failure of a PBX facility can significantly impair the functioning of an entire institution and might be tolerable only for a short period of time.

Additional controls:

• For how long will it be possible to do without the PBX?

• Within which time can assistance be furnished by the manufacturer?

• How much time is needed for a complete restart of the facility on the basis of available data backups?