MMS stands for Multimedia Messaging Service. It is a mobile telecommunications standard that extends traditional text messaging to include images, audio, and video files. The protocol relies on a store-and-forward mechanism where the sender's device uploads the media to an operator's server, which then pushes a notification to the receiver to download the payload.
The gateway is dropping packets because the MMS payload exceeds the carrier's size limit.
Related terms
Mobile data
Internet traffic routed over a cellular radio network instead of a local Wi-Fi connection.
Push notification
An automated message sent from a server to a client application without a specific request from the user.
Cellular
Relating to a network architecture that divides a geographic area into multiple radio coverage zones.