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Comsys Telecon & Media B.V.Laan Blussé van Oud Alblas 2aP.O. Box 61, 3769 ZH SoesterbergThe Netherlands

The Ring Back Tones service (RBT) provides the served called party the possibility to define an audio tune that the calling party will hear during the alerting phase. The subscriber is able to manage and personalise ring back tones. Anyone calling the subscriber will be pleasantly surprised by a spe-cially selected tune while waiting for the called party to pick up the phone.

The RBT subscriber configures the playlist with audio tunes to either provide one universal tune or customised, depend-ing on the calling party. Music, personal welcome messages and advertisements are all valid audio tunes for use with the RBT service.

The subscriber is able to manage the RBT playlist and se-lect tunes via web and SpeechFrame® Interactive Voice Response (IVR).

Two of the key features for a successful deployment of any of the ‘value-added’ services (such as Ring Back Tones) are flexibility and low cost. The lower the monthly fee subscribers are required to pay for a service, the more likely the service is to become popular and be more widely adopted.

Ring Back Tones

Operator Level Features

- Provisioning- Media Analysis and Processing- Content Provider management- RBT Management- Billing- Operation and maintenance- Statistics (RBT Usage Analysis) - most assigned RBTs - most played RBTs - ringing duration - content provider traffic - feature usage

Comsys is the designer of SpeechFrame®.

This state of art telecommunications platformgives operators and enterprises manypossibilities. The platform is based on SunSPARC Solaris and makes full use of Java,VoiceXML, CCXML and Web technology. Thepossible applications with the telephoneconnections are limited only by imagination.

Subscriber Level Features

- Single assignment- Radio Streams as RBT- RBT Pool, Jukebox- Group or Calling Party assignment- Day of the week, Time of the day- Special Events- Charts- RBT per Location- Bonus and advertisement Songs- Access Channels - Web, WAP, USSD, - SMS, IVR, MMS

How does it work?

Ring Back Tones Service implementation involves both signal-ling and media: signalling is required to make a temporary call to a Ring Back Server, before the call is established between the two parties. The Ring Back Server itself must be able to connect calls and play a selected audio stream to the caller.

The choice of the tune depends on account settings stored in the called party’s networks. Taking a GSM network as an ex-ample, the call flow can be described as follows:

(A) Places a call to (B), The RBT SCP logic looks up (B) in the RBT service database to find out if (B) has a subscription to RBT, and in case this is true, the (A) party will hear the streamed audio until (B) picks up.

When (B) picks up, the SCP tells the MSC to break the con-nection from (A) to the RBT server and instead connect (A) to (B). The resources on the RBT server are now free to deal with other calls.

The RBT server is some kind of server equipment that has both a media board (e.g. Dialogic DM3, DNI or Aculab) as well as a connection to the signalling network, either SIGTRAN via TCP/IP, traditional SS7 link or SIP/H.323 signalling to IMS networks. ISUP is needed for call control, as it is necessary to make a circuit connection to the RBT server.

MobileNetwork

Internet

PSTNOVERALL REDUNDANCY

- Local Redundant - GEO Redundant- Telecom grade - Up to 99,999%- NEBS Compliant - …

TELEPHONY SERVER- Purchase RBT via IVR - Play RBT (Voice/Video)- Starting with 30 lines- UP to 10.000+- Many telephony protocols- …

DATABASE SERVER- CDR (billing stats)- RBT Settings- Call Markers- User Settings- Many export formats…

WEB SERVER- Web shop- User configuration- RBT selection- WAP & WEB enabled- Upload RBT - …

MESSAGING SERVER- Purchase via SMS- Purchase via MMS- Purchase via USSD- …

RING BACK TONE SERVER- Ring Back Tones- Provisioning Interface- Interfaces to Back-end- Open standards- …