BGM : BGM stands for Back Ground Music. BGM is a value addition to mobile peer to peer calling wherein a subscriber is allowed to create his/her own musical ambience during a call by playing music in the background. This service is basically intended for the youth. BGM is a customized solution in which the call progress when answered is accompanied by music in the background. The caller can choose his/her music from a variety of music & sounds provided. This solution is different from CRBT solution, where music is played before the call is connected. In BGM, music is played after call is connected. Technically, it is a conference service, which involves the calling party, called party and the music playing entity, which is also, part of the conference. This entity is responsible for playing back music during the conversation.

This service provides user-based background music or scenario music for both parties during a conversation in an effect to give a better conversation atmosphere. BGM can be used without need of application, and a registered user can use the service in any way after it is applied.

•  In order to use the service, the user needs to dial a prefix (say 234) before the phone number, for the call to be
   connected with the Music M-vironment (BGM) Without the prefix, the call will be connected as a normal phone
   call.
•  User can always change background sound at will by dialing provided IVRS Interface.
• This service can not be used when A-Party is in roaming as it is IVR based service which wouldn't be
   accessible outside home network. Though this service would work if B-Party is in roaming. Charging scenarios
   would cover  the cost of STD lag in this case.