[SIPForum-discussion] Leading ITSPs to test with

[Nir Katz]

Hi,

I'm part of a team that develop a SIP ALG and my responsibility is to check our interoperability with ITSPs, IP PBXs and Phones.
I will be happy to know if there a place that lists the leading ITSPs in the world (by leading I mean number of users). This will help me to get the best ROI for my tests.

Thanks in advance

Nir
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