This feature is introduced in UMG8900 V100R001.

Resources for playingbasic tones arebuilt in the UMG8900. During avoice service call, the UMG8900 playsbasic tones under the controlof the MSC server . The UMG8900 can interwork with intelligent devices to provide intelligent services. 

Benefits:

This feature provides basic tone functions such as the ring back tone and the busy tone.

Description:

Resources for playingbasic tones arebuilt in the UMG8900. During avoice service call, the UMG8900 playsbasic tones under the controlof the MSC server . The UMG8900 can inter work with intelligent devices to provide intelligent services. 

The tone files stored in the UMG8900 adopt the G .711 codec. Each resource boardof the UMG8900 can store tone files that canbe played for two hours in total. T one files canbe repeated orbe played for multiple calls simultaneously . The resource boards work in load-sharing mode and are configured in N+1 backup mode to achieve high reliability . When capacity expansion is required on the UMG8900, new resource boards can be added with commands. 
The UMG8900 can play both synchronous tones and asynchronous tones. 

Dependency: This feature requires the cooperation of the MSC server . This feature is applicable to the VMSC and GMSC.

This document is very well done

 Each resource boardof the UMG8900 can store tone files that canbe played for two hours in total. Is there any way to increase it?

When capacity expansion is required on the UMG8900, new resource boards can be added with commands. If possible, pls share also the commands.

lets not forget that tones are tied to unique iDs which also corresponds to a similar ID on the MSC, nice piece.

Thanks for sharing/.

Excellent topic

very good

Thanks for sharing