Best Practices for a Sustainable Cloud Phone System

Cloud phone systems are getting more and more popular with every passing day; hence, the need for heightened security measures is also growing. There are a variety of threats that cloud systems are susceptible to. Security for the VoIP systems never really took huge priority because these phone systems were implemented on the local network or the WAN that were secured through local programs.

However, the ambit of cloud telephony is much higher and both the users as well as the providers of this advanced telephone system need to tighten the security. Every system that communicates over the Internet needs to have good security system to ward off unwanted threats.

A few common threats that are often found with cloud based telephone systems are DOS or Denial of Service, Cloud Eavesdropping, Vishing, attacks on service provider’s network and attack on the user’s network etc. there are a host of tools as well as techniques to provide better IP security to the cloud phone system. However, here is a list of some best practices for a sustainable cloud phone system:


There are several attackers who try to get entry into the server or gateway by bombarding them with unauthorized data packets. The result is a complete DOS or Denial of Service as the servers get overloaded with the false oncoming requests. The hackers will be able to create a huge number of bogus requests on the SIP server, making it really impossible to receive or make calls.

This type of attacks is known as Denial of Service. However, when you use authorization, it will help you to create security blanket over your server. Thus, your server will be configured in such a way that it receives only the traffic from specific or trusted IP addresses.


Authentication is another really important security measure that you will have to take to secure your cloud communication system. Here you will need to two cloud based devices to communicate with each other. The Cloud devices that will be communicating with each other will have to initiate a real communication. The process of mutual authentication is based on the shared pre-defined packets before the communication. This process makes it really tough for the hackers to hide their identity and attack the system.

Transport Layer Security

Majority of the cloud based telephone systems are vulnerable to the eavesdropping threat. The attackers enter the system and record vital audio communication using unauthorized audio data packets and then decoding the same. You will be able to prevent this type of attacks by using the transport layer security.

TSL, or, Transport Layer Security, is the protocol which presents unauthorized communication between two devices by maintaining the security, privacy as well as the data integrity between the two communicating devices. It helps in providing a safe and secure communication channels that cannot be easily broken into by the hackers. Tampering or eavesdropping of the audio signals is completely protected by the use of this protocol.


Encryption provides the ultimate security to cloud phone systems. The cloud telephone systems are able to encrypt the audio stream with the help of SRTP or Secure Real-time Transport Protocol. SRTP adds confidentiality, message authentication and even replay protection to the security profile. The primary aim of SRTP is to offer complete confidentiality of every RTP payload tagged with the integrity protection of the whole packet.

If you are a cloud service provider then it is imperative that you follow all the above to ensure safe and secure services for your customers. All business owners who want to use cloud telephony services need to ask their service provider about the best practices they follow – this will help businesses minimize losses and enjoy secure communication service.