TLS has the potential to protect communications between parties in a SIP call. I believe it is one of the standards that will grow in the near future, mainly because of the adoption of NGNs (next generation networks) in the Telco companies. It is possible to protect the communication from users and to VoIP providers. I recommend reading about this. TLS does not encrypt RTP packets, but it can be used to exchange keys for SRTP (secure RTP). SRTP can be used to encrypt SIP traffic.
Building Telephony Systems with OpenSER
Building Telephony Systems with OpenSER
Overview of this book
Table of Contents (18 chapters)
Building Telephony Systems with OpenSER
Credits
About the Author
About the Reviewers
Preface
Free Chapter
Introduction to SIP
The SIP Express Router
OpenSER Installation
OpenSER Standard Configuration
Adding Authentication with MySQL
Building the User Portal with SerMyAdmin
Connectivity to the PSTN
Call Forward and Voice Mail
SIP NAT Traversal
OpenSER Accounting and Billing
Troubleshooting Tools
After Words
Index
Customer Reviews