Glossary

Diameter is an extensible messaging protocol defined by RFC 3588, enabling Authentication, Authorization and Accounting within and across IP multimedia networks that rely on secure and reliable transports. The protocol evolved from the RADIUS protocol but is much more scalable and well defined, has fail-over capabilities, runs over secure TCP/SCTP transport, and more. Its modular
architecture offers a flexible base protocol that allows application-specific extensions.

Diameter Applications extend the base protocol by adding new commands and/or attributes. An Application is not a program, but a protocol based on Diameter.

The 3GPP standard bodies have chosen the Diameter protocol to enable IMS network Authentication, Authorization and Accounting capabilities. IMS-specific interfaces were developed to standardize Diameter protocol communication in the IMS network.

RADVISION offers a Diameter Toolkit for developers.