• María Belén Gómez

How to secure voice transmission


Although many do not know, voice transmission relies on the same process that transmits data in most enterprises. IP connection networks have been the evolutionary result of connections through massive connections, and are now responsible for the telephony transmission of voice in most companies.


Currently, a large number of international companies offer the option of Internet telephony. Such telephony faces security risks at the time of voice transmission, especially companies or people of some level of public interest, become targets of telephone interceptions, but work is being done in ways to provide greater security in this type of communication.


What are the vulnerabilities in voice-over-IP transmission?


Just like any type of transmission, voice emits data that can be exploited by hackers lurking on the web. VPNs must necessarily be encrypted from one end to the other, so that what is spoken from one point to another cannot be overheard. This is of vital importance since eavesdropping on conversations to obtain sensitive information in companies and institutions is a practice that is carried out repeatedly.


Many do not know the difference between public and private networks, and these represent a risk if in the transmission of voice, as there may be an interception when leaving the public network. This breach represents a computer access point to the corporate or institutional network, so that not only the voice transmission is at risk, but also all the data within the system.


Tips for secure transmission within a company


- Limit access to calls by means of security strategies. Access with passwords and user identification will require verification before use.

It is also helpful to configure calls by assigning them to specific areas and times. This means that not everyone in a company can access the telephone networks of all areas, but only those that depend on their activities.

- Use multilevel encryption. This system allows voice transmission to have several layers of security. By encrypting media, signaling and segments, the provider must offer increased security.

- Use firewall. This is useful to prevent hackers from hacking, it allows to track strange behaviors within the voice transmission.

- Hire security companies. Security companies can provide you with the security service that suits your needs. Servers do not always provide all the right arrangements for the care of the transmission, so it is important to look for and make clear what the security company offers.


Providing security to users


On the other side, there are customers who use voice transmission services; companies dedicated to data and voice traffic, including voice, must provide security.



It is therefore recommended that voicemail messages be deleted after they have been listened to, and that passwords be applied to limit listening access. Monitoring and reporting any alterations that may occur in a voice message are part of the security measures to be taken so that users have a better experience.


For customers, it is also possible to offer the separation of voice transmission through VLANs that are compatible with the switches, and thus generate independence between data and voice traffic, safeguarding voice with greater security.















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