The table below shows systems which the Konftel 300IP and Konftel 300IPx is tested with.
| Brand | Model | Tested | Notes |
|---|---|---|---|
| Alcatel-Lucent | OmniPCX Enterprise | Yes | NA |
| Avaya | Communication Manager | Yes | |
| Avaya | Integral Enterprise | Yes | |
| Avaya | IP Office* | Yes | Installation |
| Mitel (Aastra) | MX-ONE | Yes | |
| Mitel (Aastra) | Ascotel i7.7 | Yes | |
| Mitel (Aastra) | BusinessPhone | Yes | |
| Brekeke | PBX 2.0 | Yes | |
| Broadsoft | Broadworks | Yes | |
| Cisco | Cisco Unified Communication Manager | Yes | Installation |
| Digium | Asterisk | Yes | |
| Mitel | 3300 | Yes | |
| NEC Phillips | iS3000 v810.42, SV9100 | Yes | Compatibility Report |
| OpenSER/OpenSIPS | Yes | ||
| Panasonic | NCP500/1000 | Yes | |
| SIPPY | Yes | ||
| Atos Unify (Siemens) | HiPath 4000 (v4.0, v5.0), OpenOffice MX | Yes | |
| Atos Unify | OpenScape Business | Yes | Certificate |
| Atos Unify | OpenScape 4000 V7 | Yes | Certificate |
| Atos Unify | OpenScape Voice V9 | Yes | Certificate |
| Skype Connect | Yes | Installation | |
| 3CX | IP Phone System | Yes | Installation Test protocol |
| CommuniGate | Pro | Yes | Installation Test protocol |
| Advoco NetPBX | Dialect Unified | Yes | Installation Test protocol |
| Broadworks | TDC Scale | Yes | Installation |
| Siemens | OpenScape Office MX | Yes | |
| iCentrex | iCentrex | Yes | Installation |
| babyTEL | Yes | Installation | |
| Unotelefoni | Asterisk PBX | Yes | Installation |
| Allworx | Allworx 48x/6x | Yes | |
| Samsung | OfficeServ7200 | Yes | |
| Swyx | SwyxWare | Yes | |
| Vonage/Vocalocity | Yes | ||
| AltiGen | IP-PBX** | Yes | |
| XBlue Networks | X-50 VoIP Phone System | Yes | |
| ShoreTel | ShoreTel 14.2 | Yes | Details on ShoreTel |
| Innovaphone | Innovaphone 12R2 | Yes | |
| Telia | Touchpoint | Yes | |
| Atos Unify | OpenScape Cloud | Yes | Details on Unify |