Your monthly phone bill arrives with thousands of dollars worth of extra charges for calls your team didn’t make. This is happening right now in New Zealand – make sure it doesn’t happen to your business by following these 10 steps.
Hackers use various methods to access a PABX, which may be done for many reasons but primarily for obtaining free calls. The result, is a very large telephone bill for the hacked company.
If the incoming trunks are free-phone numbers the fraudsters enjoy the benefit of completely free calls, with the hacked company paying the bill for both ends of the call!When telephone system hacking began, it was achieved by people who used PC’s to break into the voice mail system. Hackers used mailboxes to spread Information, conduct drug sales, post stolen credit numbers or simply to record nasty greetings for callers. Now however hackers use telephone systems to obtain outgoing trunks, they then sell this ‘access’ to a community of people for dialling expensive international calls. If the incoming trunks are free-phone numbers the fraudsters enjoy the benefit of completely free calls, with the hacked company paying the bill for both ends of the call!
Never use the default passwords for voice mailboxes, system administration, conference bridges, etc., and use passwords that aren’t obvious or easy to guess, such as 1234. Enforce a policy of changing passwords on a regular basis, and when someone leaves the company, delete their mailboxes immediately, and block or delete all inactive mailboxes.
2Restrict Phone Feature Access During Off-Business Hours
Identify which phones need to make long distance calls, require outbound access during off business hours, and need to make out-of-state or international calls – then restrict these capabilities for the phones that don’t require them.