What SIP Phones can I use with 3CX Phone System?
The following SIP Phones / IP Phones are supported by 3CX Phone System for Windows. Click on the phone for a detailed configuration guide. Each IP phone has a configuration guide to allow it to be configured via its web interface, or alternatively to allow it to be provisioned and thus configured remotely from the 3CX Phone System interface. 3CX has 3 categories of IP phones with which it works - preferred phones, supported phones and tested phones.
SIP Phone Configuration Guides (Preferred) 
- 3CXPhone for Android (Provisioned)
- 3CXPhone for iPhone
- 3CXPhone for Windows
- CISCO SPA 501G, 502G, 504G, 508G, 509G, 525G (Manual configuration)
- CISCO SPA 501G, 502G, 504G, 508G, 509G, 525G (Provisioned)
- How to auto-provision IP phones with DHCP 'option 66'
- GrandStream GXP-1450, 2110, 2120 and GXP 2100 (Provisioned)
SIP Phone Configuration Guides (Supported) 
- GrandStream GXP-2000 (Manual configuration)
- GrandStream GXP-2000, 280, 1200, GXP 2010 and GXP-2020 (Provisioned)
- GrandStream HandyTone 386 ATA
- GrandStream HandyTone 486(487),286(287) ATA
- Linksys 3102 ATA and Fax - T38 Fax Pass-through
- Linksys SPA 901, 921, 941, 922, 942, 962 (Manual configuration)
- Linksys SPA 901, 921, 941, 922, 942, 962(Provisioned)
- Polycom KIRK Wireless Server 300
- Polycom SoundPoint IP 320, 321, 330, 331, 430, 450, 550, 560, 650, 670 (Manual configuration)
- Polycom SoundPoint IP 320, 321, 330, 331, 335, 450, 550, 560, 650, 670(Provisioned)
- Polycom SoundStation IP6000
- Yealink T20, T22, T26, T28 (Manual configuration)
- Yealink T20, T22, T26, T28 (Provisioned)
SIP Phone Configuration Guides (Tested) 
- Aastra (67)51i, (67)53i, (67)55i, (67)57i (Manual configuration)
- AAstra (67)51i, (67)53i, (67)55i, (67)57i (Provisioned)
- Aastra SIP-DECT
- CISCO 7940
- Counterpath Bria
- Linksys SPA-901
- Nokia E65 / E71 / N95
- Siemens C470IP
- Snom 300, 320, 360, 370, 820, 821, 870 (Manual configuration)
- Snom 300, 320, 360, 370, 820, 821, 870 (Provisioned)
- SNOM M3
- X-Lite 3.0
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