Like with emails, some of us prefer to have an independent SIP address, with no relation to current job or location. Being asked several times about free services running Kamailio (OpenSER) or SIP Express Router (SER) – the recently SIP Router project, I am doing a top of my favourite free VoIP providers.
No preference among them, you have to figure out what fits the best for you alone, so I am just listing them in alphabetic order.
Managed by the author of Ekiga SIP Softphone. Some of the features:
- peering interconnection
- audio conference
- address book
Managed by several developers of SIP Express Router (SER). Some of the features:
- speed dial
- pstn gateway self provisioning
- call forward
- accounting view
Managed by the founders of VoIPUser.org web forum.
- UK inbound PSTN number
- limited outbound calls
- INum numbers and interconnection