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Help – VoIP operators


Ideal operator (still) not exists. And even more, there is very hard to say, how ideal operator should look like.
And so do not wait a single correct name of the VoIP operator from us and prefer to see a list of those good.

Operators quality

The quality of VoIP operators means respect for signaling standards, proper support for some user features, such as the correct transmission of Caller ID, two-way DTMF communication and early media two-way transmission.
Talk about the reliability of the operator and sound quality are not considered relevant, as anyone who has to be worthy of the name "VoIP operator" must be flawless in this respect (and the vast majority of the current VoIP operators also is)…


Operators list

Countries are alphabetically ordered and individual operators too.


Country Name URL Test
account
Non-geo
numbers
CLIP SIP
server
DTMF Early
media
Note
AT Sipcall www.sipcall.at ? ? from time to time proxy in/out in identical to sipcall.ch
Sipgate www.sipgate.at yes yes self-net invalid proxy in/out in identical to sipgate.de
CH Sipcall www.sipcall.ch ? ? from time to time proxy in/out in arrogant support
CZ 802.Vox www.802.cz no yes valid hybrid in/out in/out cheap, free cz peering
XPhone www.xphone.cz no no valid B2BUA in/out in/out superior quality
DE Carpo www.carpo.de ? ? self-net invalid proxy in/out ? friendly support
dus.net www.dus.net no no probably valid ? in/out ? noncommunicative
Sipgate www.sipgate.de yes yes self-net invalid proxy in/out in very friendly support
SK Imafex www.imafex.sk no no valid hybrid in/out in/out only some regions
UK Sipgate www.sipgate.co.uk yes yes self-net invalid proxy in/out in identical to sipgate.de