SIP Products and Services
SIP Service Providers
- See the VoIP Service Providers page
SIP Vendors
- Protocol Stacks
- Servers
- User Agent Clients/Servers
- Phones
- Enhanced Services
- Analyzers
- SIP Consultants
Note: An additional list of SIP implementations is also maintained by Henning Schulzrinne on the Columbia University SIP page.
This page is maintained by Carl Lindner.