Fold no more do not call WEBde account over Sipgate servers

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Thus so far I could call WEBde numbers over Sipgate free of charge also from other VoIP Providern. The format was then 02222948xxxxx@sipgate.de, and/or 01212xxxx@sipgate.de e.g. folded. from 1&1 or DUSnet. Since newest this however any longer with me, in the telnet log of the Fritz box comes now always a Authentication Request of Sipgate of which does not go naturally not funzt from 1&1 or DUSnet call I the WEBde Sipgate URI over mean Sipgate account folds on also further problem-free.
Now with me, for my box, or is other one appropriate somehow already noticed? because at least it several weeks ago still went until with this WEBde Sipgate URI solution

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Sounds itself so similarly, how this problem!?

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THX, then is that
with 492222xxxx@sipgate.NET as well as 491212xxxx@sipgate.NET klappts with me also again
went so far in addition, with Sipgate.de - times see like for a long time it at all still will go

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Well if it again folds, then are pleased and too.

And here the standard text: If there are still questions for this, ask simply one the responsible Mods or Admins bescheit give and it can continue.