RSA Overview

Push To Talk (PTT) service provides an arbitrated method by which two or more users may engage in communication. Users may request permission to transmit (for example, traditionally by means of a press of a button). The Mission Critical Push To Talk (MCPTT) service supports an enhanced PTT service, suitable for mission critical scenarios.

The MCPTT Service is intended to support communication between several users (a group call), where each user has the ability to gain access to the permission to talk in an arbitrated manner. However, the MCPTT Service also supports Private Calls between pairs of users. The primary target of MCPTT is to provide a professional Push to talk service (for example, public safety, transport companies, utilities or industrial and nuclear plants).

To avoid overloading RSA, the Application Routing Table (ART) is configured to route only the Rx diameter messages based on Application ID and Command code.

RSA can be enabled and disabled as a DCA framework application. Disabling RSA on a specific site is possible only if RSA has been disabled on all the DA-MPs for that specific site. RSA can be configured at the NO and SO level.

The DCA framework creates applications on top of the Diameter Signaling Router (DSR) allowing for a faster development cycle. There can be up to 10 versions of each DCA in the various states.

To use RSA for DCA, the DCA framework must be activated on the NO. Activation needs to be performed only once. See Diameter Custom Applications Feature Activation Guide for instructions on how to activate the DCA framework.

When RSA is initially installed, it is disabled, and you must manually enable it. See Enabling RSA to enable the application for every DMAP using RSA.

If RSA is in the DCA framework GUI menu, this means the application is already enabled, but that does not guarantee it is provisioned. See Disabling RSA to disable RSA.

DCA framework application functionality varies between the SO and NO. For example, System Options is available on the SO only.