onSIP PBX says never pay for users or extensions
While some hosted PBX systems have extra charges for more extensions and more users onSIP is different. The company says they focus on small and medium sized businesses.
Making calls to any SIP address or receiving calls to your SIP address are always free. That means you can program overseas access to ring in the United States, and U.S. based SIP services can ring to your PBX in other countries. Some free U.K. telephone numbers come with SIP programming features.
Unlimited users, and extension to extension dialing are also free. The onSIP team are experienced professionals and their prices are good because of experience and lower costs.
onSIP is one of those websites that requires a 'www', but you should visit their website to check out some great ideas.
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Virtual PBX Free Trial
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