About 3CX
3CX is an open-standards IP PBX which can be deployed on Windows, Linux or in the cloud (Google, Amazon, Azure). It offers a complete suite of Unified Communications features such as chat, web conferencing, smartphone apps for iOS and Android and more. 3CX will not only cut your telco costs by up to 80%, it's also easy to manage, maintain and use for both the admin and user. Try it for free here.
Quick start guide how to use a DECT handset behind 3CX
Quick start guide how to use a Maxwell behind 3CX
See below for a list with supported features when using the Gigaset IP devices behind an 3CX PBX system. 
| Feature | N870/N670 | N510 | N720 | Maxwell B/2/3/4 | Maxwell 10 | |
|---|---|---|---|---|---|---|
| 3CX Status | Supported | Legacy support | Legacy support | |||
| Gigaset software release used: | 2.23.0 | 240 | 105 | 3.14.8 | 2.5.33.1 | |
| 3CX software used | V16 | V16 | ||||
| Basic Call | Yes | Yes | Yes | Yes | Yes | |
| Calling line (CLIP) | Yes | Yes | Yes | Yes | Yes | |
| Connected line (COLP) | - | - | - | - | - | |
| Anonymous call | Platform Feature | Platform Feature | Platform Feature | Platform Feature | Platform Feature | |
| Do Not Disturb | Yes | - | - | Yes | Yes | |
| Message waiting | Yes | Yes | Yes | Yes | Yes | |
| Call list/history | Yes | Yes | Yes | Yes | Yes | |
| Voice mail deposit/retrieval | Yes | Yes | Yes | Yes | Yes | |
| Call waiting | Yes | Yes | Yes | Yes | Yes | |
| Call Hold / Toggle | Yes | Yes | - | Yes | Yes | |
| Music on Hold | Yes | Yes | Yes | Yes | Yes | |
| Call forward (CFU) | Platform Feature | Platform Feature | Platform Feature | Platform Feature | Platform Feature | |
| Call forward (CFNR) | Platform Feature | Platform Feature | Platform Feature | Platform Feature | Platform Feature | |
| Call forward (CFB) | Platform Feature | Platform Feature | Platform Feature | Platform Feature | Platform Feature | |
| Call Transfer attended | Yes | Yes | Yes | Yes | Yes | |
| Call Transfer unattended | Yes | Yes | Yes | Yes | Yes | |
| Call Transfer blind | Yes | - | - | - | - | |
| DTMF (RFC2833) | Yes | Yes | Yes | Yes | Yes | |
| Conference 3pty | Yes | Yes | - | Yes | Yes | |
| BLF Busy / Idle indication | - | - | - | Yes | Yes | |
| Call pick-up direct ( *20* extension) | Yes | Yes | Yes | Yes | Yes | |
| Call pick-up group ( *20 ) | Yes | Yes | Yes | Yes | Yes | |
| Call pick-up BLF | - | - | - | Yes | Yes | |
| Call completed elsewhere | Yes | Yes | Yes | Yes | Yes | |
| UDP / TCP | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | |
| 3CX Phonebook | Yes | - | - | Yes | - | |
| Hotdesking | - | - | - | Yes | - | |
| Shared Parking | - | - | - | Yes | - | |
| Auto provisioning | Yes | Yes | Yes | Yes | Yes | |
| URL via Plug and Play | No, because is FXS/DECT Device | No, because is FXS/DECT Device | No, because is FXS/DECT Device | Yes | - | |
| Number of SIP accounts via prov. | 250/20 | 6 | 100 | 1 | 1 | |
| Web Language |
|
| Yes | Yes | Yes | |
| Change device web-password | Yes | - | - | Yes | - | |
| Time zones | Yes | Yes | Yes | Yes | - | |
| Tone Set Selection | Yes | Yes | Yes | Yes | - | |
| Codec priority | Yes | Yes | Yes | Yes | Yes | |
| HTTP/HTTPS provisioning | Yes | Yes | Yes | Yes | - | |
| Firmware update | Via web-interface N870 | Via web-interface N510 | Via web-interface N720 | Via web-interface Maxwell | Via web-interface Maxwell | |
| Trigger provisioning | Manual (3CX limitation) | Manual (3CX limitation) | Manual (3CX limitation) | Yes | - | |
Additional information:
| Feature | Code | Comment |
|---|---|---|
Park a call. While on a call, click on the Transfer button and dial *0 followed | *0 | Call Park / Retrieve via function key is possible with Maxwell 2 and 3 from software 2.24 |
| Pick up a parked call. E.g. to pick up a call parked in slot 1, dial *11 | *1 | |
Pick up a call which is dialling at another extension. For example to | *20* | |
| Broadcast call. Dial *9 followed by the extension number. If the receiver’s phone has set-up Call Manager "Auto-answer" option, the phone will pick up automatically. | *9 |