8x8 Partner and VAR Cheat Sheet

DNS Options 

• Do not use Google DNS or OpenDNS.
• When using recommended DNS options, if their ISP is not listed, they should contact their ISP about recommendations.
• The 8x8 GTMs DNS should only be used if the physical phones are on either a dedicated VLAN or their own entire network with no other device (desktops, laptops, etc.) as they do not allow standard internet traffic and only VOIP/SIP traffic.

Meraki-Specific Settings

• Make sure SRTP is set to enabled.
• Hard code 8x8 GTM options anytime possible.
• Force the phones to go over TLS.

Network Layout Template

• ISP:
• Make/Model gateway/modem: (If a gateway, is it in bridge mode or does it have a pinhole to the firewall?)
• Make/Model Firewall/router:
• Make/Model of any switch between firewall and phone:
• Any additional servers that may be influencing traffic?
• VLAN configurations: (Optional)
• Is an SD-WAN (or Loop) being run between multiple sites? (Optional)
• Is a VPN being used?
• Are there any load balancers in place?

WinMTR or Ping Plotter

When running WinMTR or Ping Plotter make sure to check against all three of the following:

• 192.84.16.2 – West Coast
• 8.28.0.2 – East Coast
• Local router private IP

Subnets to Whitelist, Allow, or Permit

VO and VCC Ports to Open

• TCP 636
• TCP 5199
• TCP 5401
• TCP 5443
• UDP 443
• UDP 5060
• UDP 5199
• UDP 5299
• UDP 5399
• UDP 10000
• UDP 24000-30999
• UDP 38000-44999
• UDP 50000-65535
• Note: A complete list of updated ports can be found in the X-Series Technical Requirements link.

Fax Settings

• Fax Speed or Baud Rate should be lowered to 9600bps.
• Error Correction Mode (ECM) should be disabled.
• Resolution should be Standard (not Fine, Ultrafine, Photo, etc.).
• Overseas (International) Mode set to ON.
• Set to Fax-Only mode.
• Call Waiting must be disabled for the fax extension.

Various Hardware Tricks and Tips 

• For Obihai adapters, SRTP should be disabled.
• For Audiocode adapters, SRTP should also be disabled.
• For Audiocode adapters, it can sometimes take up to 15 minutes of rebooting before the Bootstrap.ini file completes its upload and provisioning. Let it sit for at least this long if experiencing issues.
• Some Polycom devices are enabled with ZTP (Zero Touch Provisioning) but may experience issues and, if so, the following articles are recommended:
  • Click here for the article regarding Overriding ZTP.

Call Samples and Details

All call samples should be submitted within 24 hours or less of occurring. This allows us time to escalate them to our NOC, and if needed, our carriers.