One of the most prominent Media server features is to provide system announcements for Telephony Control Server when required. Every system announcement exists for all languages that Telephony Control Server supports. The system announcements can thus be used for each country in which one of the supported language is spoken.
The system announcements described here are independent from those that the Media Server manages for the voice and conference portal of Telephony Application Server.
A system announcement of Telephony Control Server consists of at least one sound segment played to a subscriber. Besides the sound segments, additional settings can be defined in Telephony Control Server for a system announcement – e. g. how often a sound segment is played to a subscriber or the playback pause between the single sound segments.
Telephony Control Server requests the Media server to play system announcements appropriate for selected events or states. These requests comprise information about the sound files and the relevant target subscriber.
Telephony Control Server is shipped with many default system announcements that can be administered via CLI or Telephony Control Server Assistant. Furthermore, customer-individual system announcements can be created and managed by the system administrator.
Each Media server provides for each supported language a so-called Basic-Announcement-Unit-Set (BAU-Set). These BAU-sets are used for system announcements playback and contain in most cases the following:
Date and time specifications
Names for weekdays and months
Commonly used words – e. g. and, the, etc
The Media server system announcements can be divided in the following main categories:
Parent topic: Media Services
System Announcement Categories
Media server system announcements can be divided into two categories: intercept announcements and interactive announcements. During the system announcement handling the Media server is controlled by Telephony Control Server for both system announcement types.
System Announcement Playback
Telephony Control Server controls the Media server in a way that it plays system announcements as they are appropriate for individual events or circumstances. In the scope of this control, information is transferred that defines the respective system announcements and the relevant target device.
How to Configure a System Language for Subscribers
The language in which Telephony Control Server plays system announcements can be specified system-wide for all subscribers.
How to Provide Languages for Individual Subscriber Settings
The language in which Telephony Control Server plays system announcements can be specified individually for each subscriber in the subscriber settings. The desired languages must first be provided for selection so that you can then make your choice in the subscriber settings.
How to Remove Languages from the Individual Subscriber Setting
How to Configure a Fallback Language
If a language packet contains only individual tones for the relevant country, the Media Server cannot automatically play system announcements for the relevant language. In this case you need to configure from which alternative language packet the Media Server is to use system announcements.
How to Replace an Existing System Announcement
How to Add a New System Announcement
Language Varieties of System Announcements
So that the Media server can play a system announcement or tone, the Telephony Control Server must transfer the ID of the language for which the greeting or tone is to be played to the server. Telephony Control Server supports currently no locale IDs, but only language IDs. Therefore, Telephony Control Server cannot expressly prompt a Media server to play a system announcement in a language variety – e. g. in Brazilian, which would be a language variety of Portuguese. To support language varieties just the same, the Media Server enables the playback of language varieties internally.
RTP System Parameters for System Announcements
The behavior of Telephony Control Server system announcements is influenced by a system-wide setting – by a so-called Resilient Telco Platform system parameter (RTP system parameter).