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) 
- How to auto-provision IP phones with DHCP 'option 66'
- 3CXPhone 4
- CISCO SPA 501G, 502G, 504G, 508G, 509G, 525G (Manual configuration)
- CISCO SPA 501G, 502G, 504G, 508G, 509G, 525G (Provisioned)
- 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)
SIP Phone Configuration Guides (Supported)
- GrandStream GXP-2000 (Manual configuration)
- GrandStream HandyTone 486(487),286(287) ATA
- GrandStream HandyTone 386 ATA
- GrandStream GXP-2000 and GXP-2020 (Provisioned)
- Polycom SoundStation IP6000
- Polycom SoundPoint IP 320, 321, 330, 331, 430, 450, 550, 560, 650, 670(Provisioned)
- Polycom SoundPoint IP 320, 321, 330, 331, 430, 450, 550, 560, 650, 670 (Manual configuration)
- Snom 300, 320, 360, 370, 820 (Manual configuration)
- Snom 300, 320, 360, 370, 820 (Provisioned)
SIP Phone Configuration Guides (Tested)
- Polycom KIRK Wireless Server 300
- Yealink T20, T22, T26, T28 (Manual configuration)
- Yealink T20, T22, T26, T28 (Provisioned)
- CISCO 7940
- Counterpath Bria
- Fring for Iphone, Windows mobile
- Linksys SPA-901
- Nokia E65 / E71 / N95
- Siemens C470IP
- iSip (formerly SipPhone on iPhone)
- SNOM M3
- Aastra (67)51i, (67)53i, (67)55i, (67)57i (Manual configuration)
- Aastra SIP-DECT
- AAstra (67)51i, (67)53i, (67)55i, (67)57i (Provisioned)
- X-Lite 3.0
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