Simple SIP provider?

Question

Telephony

There was a need for relatives to give the opportunity to call Russian numbers from a computer.
I googled for the presence of SIP providers and became despondent, solid advertising, indistinct tariffs, my own calling programs.
Therefore, turning to you, who can use it, the requirements are very simple.
1. Possibility of payment from the card and from the qiwi terminal.
2. the usual ip telephony protocol supported by open clients.
3. good call quality.
4. the price does not play a special role.
5. Desirable payment upon calls, no subscription fee.
as a bonus it will be possible to call from the site using JS (without flash)

Answer 1

all operators have a sip protocol connect to any clients,
choose from who is more expensive, they take more channels and are more stable
, always used sipnet before, like I didn’t experience any special problems

Answer 2

I’ll also advise what I use myself, I didn’t find Comtube
cheaper. The link is also referral.