VoIP Phones - 3cx
3CX is a software phone for Windows, iPhone and Android. See www.3cx.com/voip/softphone
This SIP software on an iPhone just works.
| 3CX Feature Notes | |
|---|---|
| Tested on FireBrick SIP Server | Yes |
| IPv6 Support | Possibly not |
| Versions Tested | iPhone |
| NAT Tested | Yes, Worked on 3G data services |
Configuration
| iPhone 3CX Configuration Settings Example | |
|---|---|
| Name: | Your name |
| Display Name: | Your name, etc. |
| User: | Your phone number |
| ID: | Your phone number |
| Password: | ****** |
| Local PBX: | voiceless.aa.net.uk |
| External PBX IP: | voiceless.aa.net.uk |
| PBX Port: | 5060 |
| Stun: | Empty |
| Proxy: | Empty |
| Local SIP Port: | 5065 |
| First RTP port: | 4000 |
| TCP Transport: | Off |
| NAT HElper | Off |
| Echo CAncellation: | On |
| GSM | Off |
| G.711 (aLaw) | On |
| G.711 (uLaw) | Off |
Notes
- Disable STUN by deleting the stun server settings
- Disable NAT helper
- Enable/Disable echo cancellation depending on what works best for you
- Force a-law audio (probably unnecessary).
- Also works over 3G (dependant on signal!)
- Also see Blog post
Firewall & Security
- Also see the VoIP Security page for information about securing your VoIP service.