Compatibile con qualsiasi connessione SIP-, router, sistema telefonico o provider, z.B.:
| 3com | Aastra | Agfeo |
| Alcatel OmniPCX Enterprise (OXE) | Alcatel OXO Connect | Alcatel-Lucent |
| Asterisco | ASTIMAX | Auerswald (FONTevo) COMpact/COMmander |
| autphone aut-voice | Avaya IP Office | Bintec Elmeg be.IP |
| fino a . cloud | DeTeWe | Standard telefonico tedesco |
| dus.net | Ericsso | Firstcom Europe AG Universe Cloud Connect |
| FRITZ! Box | HFO Crown Centrex | innovaphone |
| innovaphone | Mitel | Mitel MiVoice 400 |
| Mitel MX-ONE | NFON | Il giorno di Pasqua DeTeWe – OD Cloud |
| Panasonic | Serie Panasonic KX-NS(X). | Placetel (Cisco) |
| Placetel PROFI vPBX | sistema telefonico virtuale reventix | Sistemi telefonici Starface |
| Swyx | Scatola di digitalizzazione Telekom Premium | Scatola di digitalizzazione Telekom Smart |
| Telekom Octopus FX | Telekom Octopus NetPhone Cloud | Tiptel |
| Unifica OpenScape 4000 | Unify OpenScape Business | Vodafone |
L'IP-SoftPhone ne offre molti soluzioni preimpostateper facilitare l'installazione:
| 1 e 1 | Internet 3cx- | 3xc-LAN | 3 stelle | 3utelecom | annatel | AOL |
| asia-call | atpnet | avm | avm-box | babytel | blueface.ie | bluesip |
| Bluewin | Boadvoice | BugetPhone | callcantric.com | CallVoip | congstar.de | corbina.ru |
| debitel | deltathree | draytel | dus | easybell | ekiga.net | execulink |
| free.fr | freecall.com | freeipcall | fritz-box | globaliptel | gmx | alveare |
| ipphonex | Interbit | internetcalls.com | ipertelecom.fr | ippi.fr | iptel | iristel |
| kamp-dsl | kt-net.at | mobilkom austria | openvoip-it | outbox.de | pbx-network | pennytel.com |
| peoplefone | phonext | placetel | plfon.pl | Poivy | polvere | purtel |
| qsc | fonte | anello centrale | rolmail | rynga.com | simplyconnect | cantando |
| sipbase | sipbase vTK | sipcall | Sipgate | sipgate-team | sipgate.co.uk | sipgate.com (US) |
| sipgate.ru | SIPphone | SKYPHO | slovanet | smartnet | snafu | STRATO |
| t-online | telecass | teleson | Telefono | Tesco.com | pensa internazionale | Unotel |
| ViaTalk | viva.gr | vodafone.is | voicetrading | voipax | voipgateway | voipian |
| voipraider.com | voiptalk | Vonage | web.de | winet.ch | Xeloq | Telefonia XS4ALL |
| yesss |