SSCP Systems Security Certified Practitioner All-in-One Exam Guide 104 accounting (to track events such as long distance calling), call blocking, conference call- ing, caller identification, speed dialing, and more. Most systems also support remote administration of the system by telephone system administrators. Some of the common methods that you can use to secure phone systems include the following: Protect the system and wiring with physical security Store systems within a secure area such as in a server room and restrict access to only authorized individuals. Protect and regularly change the administrator password PBX systems have administrator accounts to access advanced functions. These passwords should be strong, kept private, and regularly changed. Restrict numbers that can be used for call forwarding Most PBX systems allow you to specify what in-house numbers will support call forwarding. Additionally, you can also specify to what numbers that numbers can be forwarded when call forwarding is enabled. Restrict long distance calling You can enable toll-free calling and block other long distance calling. Most systems include the ability to allow long distance calling in certain situations, such as when a caller enters an authorization number.