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8x8 Support

What is the recommended firmware for 8x8 phones and analog adapters?

Applies To 

  • Phone Settings
  • Firmware


The tables below list the latest certified and recommended firmware versions for devices used with 8x8. This list is actively updated as new firmware revisions are certified and released for general availability within 8x8. 

Newer updated firmware may work with the 8x8 system if used, however, if the firmware has not been certified for use there may be issues that 8x8 will be unable to solve without downgrading the affected devices to a firmware certified for use.

Recommended Firmware for 8x8 Phones

Brand Model Device Type Recommended Firmware
Cisco 7811 IP Phone sip78xx.11-3-1MSR1-3.loads
Cisco 7821 IP Phone sip78xx.11-3-1MSR1-3.loads
Cisco 8841 IP Phone sip88xx.11-3-1MSR1-3.loads
Cisco 8861 IP Phone sip88xx.11-3-1MSR1-3.loads
Cisco SPA 303 IP Phone 7.5.7
Cisco SPA 504G IP Phone 7.5.7
Panasonic KX-TGP600 DECT Cordless IP Phone


Polycom VVX 101 IP Phone
Polycom VVX 150 IP Phone
Polycom VVX 201 IP Phone
Polycom VVX 300 IP Phone
Polycom VVX 301 IP Phone
Polycom VVX 310 IP Phone
Polycom VVX 311 IP Phone
Polycom VVX 401 IP Phone
Polycom VVX 410 IP Phone
Polycom VVX 411 IP Phone
Polycom VVX 501 IP Phone
Polycom VVX 601 IP Phone
Polycom IP 5000 Conference Phone
Polycom IP 6000 Conference Phone
Polycom IP 7000 Conference Phone
Poly Trio 8300 Conference Phone
Poly Trio 8500 Conference Phone
Poly Trio 8800 Conference Phone
Poly  VVX D230 DECT
Yealink T41P/G IP Phone
Yealink T42G IP Phone
Yealink T46G IP Phone
Yealink T48G IP Phone
Yealink T49G IP Phone
Yealink W52p DECT Cordless IP Phone



Yealink W70B DECT Cordless IP Phone W70B-
Yealink T41S IP Phone
Yealink T42S IP Phone
Yealink T46S IP Phone
Yealink T48S IP Phone
Yealink CP860 Conference Phone

Recommended Firmware for AudioCodes and ATAs

Model Recommended Firmware
MP-112 6.60A.365
MP-114 6.60A.365
MP-118 6.60A.365
MP-124 6.60A.365
MP-124E 6.60A.366.005
Obi300 OBi30x-3-1-2-5896.fw
Obi508 OBi500-4-0-4-5793.fw

Recommended Firmware for Compatible Devices 

These devices are compatible with 8x8 services but are not sold by 8x8.

Brand Model Device Type Recommended Firmware
Aastra 6753i IP Phone
Aastra 6755i IP Phone
Aastra 6757i IP Phone
Cisco SPA 525G2 IP Phone 7.5.7
Polycom VVX 1500D IP Video Phone
Polycom IP 335 IP Phone
Polycom IP 550 IP Phone
Polycom IP 670 IP Phone
Polycom HDX 4000 IP Video Phone 3.0.1.x
Polycom HDX 4001 IP Video Phone 3.0.1.x
Polycom HDX 4002 IP Video Phone 3.0.1.x
Polycom HDX 6000 IP Video Phone 3.0.1.x
Polycom HDX 7000 IP Video Phone 3.0.1.x
Polycom HDX 8000 IP Video Phone 3.0.1.x
Polycom HDX 9000 IP Video Phone 3.0.1.x
Yealink T23P/G IP Phone
Yealink T40G IP Phone
Yealink CP860 Conference Phone
Yealink CP920 Conference Phone
Yealink CP960 Conference Phone
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