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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 |