Here are my top 5 ways to ensure that your organisation can help prevent Telephone fraud:
1. Ensure that you have a secure PBX firewall installed. Companies such as Nimans and Rocom claim to be at the forefront of developing such solutions to contain outbreaks of phone hacking in the UK.
2. Ensure that voicemail boxes and PBXs are protected with PIN numbers which are changed regularly. Any voicemail boxes not in use should be de-activated from the system.
3. Install voice recording on all incoming and outgoing phone calls. This way if anyone does hack in you have a chance of finding out how they may have done it.
4. Make sure you know and understand all the functionality of your PBX and block any unecessary access e.g. if one extension does not need to mkae mobile or international calls, ensure that the access is blocked.
5. Make sure you always monitor (or disable if not needed) DISA – Direct Inwards System Access.
