Terms and definitions in messaging

Multichannel messaging service is based on a variety of telecommunication and Internet technologies. In the description of services, we often use abbreviations that may not always be known to you. Here we have compiled a glossary of terms and definitions used in the industry.

Over the Top (OTT)

Over the Top (OTT) messages are messages that flow through the data network of a Mobile Operator as opposed to the core network as traditionally was the case. Over the Top suggests something that flows over the top of the core network. By way of example, a P2P SMS message travels through the core signalling infrastructure of a Mobile Operator, where a WhatsApp message will flow through the data connection of a mobile operator (just like any other data). In this context a WhatsApp message is regarded as an OTT message.