[SIPForum-discussion] How is SIP billed ?

[Manish Aggarwal]

 Thats correct !!

While there are well defined means to bill the "SIP trunk" calls, the SIP
extension to extension calls cannot be billed with that much accuracy.
May be thats the reason companies like Vonage, Viatalk, Sunrocket (already
bankrupt)  etc, (which use SIP), take an annual charge, and not on a per
call
basis.

-Manish




On Wed, Apr 22, 2009 at 2:25 AM, Yevgen Krapiva <ykrapiva at gmail.com> wrote:

> Hi.
>
> Can you say me what methods are used to bill SIP phone calls ?
> As I understand, to bill SIP you must ensure that all SIP signalling
> passes some Proxy or B2BUA. This is impossible as I can always call
> another caller directly, passing by proxy.
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