Change search
ReferencesLink to record
Permanent link

Direct link
GSM Voice Mail Service TDM Call Control
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The Voice Mail Service (VMS) enables forwarding of calls to a dedicated Voice Mail Server (VMS) on behalf of the call receiving subscriber during certain conditions such as 'busy subscriber', 'no answer', 'always', etc.

The standardization forum 3GPP has specified the Global System for Mobile communication (GSM) while the standardization forum ITU-T has specified the Integrated Services Digital Networks  (ISDN) User Part (ISUP) call control protocol. Both of these standards rely on the use of Time Division Multiplex (TDM) as a media bearer and SS7 as signalling bearer, where both bearers require use of very expensive telecom-specific hardware.

The thesis proposes the solution to use RTP as media bearer and IP as signalling bearer towards the handset in GSM and only use TDM as media bearer and SS7 as signalling bearer towards the VMS.

The thesis demonstrates  the feasibility and the advantages provided, by creating an implementation in Erlang/OTP and testing it to check if it confirms to the specification.

Place, publisher, year, edition, pages
IT, 12 072
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-189242OAI: diva2:581042
Educational program
Master Programme in Computer Science
Available from: 2012-12-28 Created: 2012-12-28 Last updated: 2012-12-28Bibliographically approved

Open Access in DiVA

fulltext(1055 kB)3221 downloads
File information
File name FULLTEXT01.pdfFile size 1055 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Department of Information Technology
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 3221 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 365 hits
ReferencesLink to record
Permanent link

Direct link