3CX Phone System Support
3CX has extensive technical support resources including manuals, wiki, forums, configuration guides and paid support. Please note that 3CX does not provide free support. Review our support procedures and pricing here.
Support resources
Search Search the entire 3CX Website, including the FAQs, the configuration guides and the forums:
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) 
- Yealink T20, T22, T26, T28 (Manual configuration)
- Yealink T20, T22, T26, T28 (Provisioned)
- 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)
VOIP Gateway Configuration Guides 
More 3rd party vendor supported gateways can be found here.
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