| Troubleshooting | 92How can I obtain the MAC address of a phone when the phone is notpowered on?You can use one of the following ways to obtain the MAC address of a phone:• You can ask your supplier for shipping information sheet which includes MAC addresses according to thecorresponding PO (Purchase Order).• You can find the MAC address on the label of the carton box.• You can also find the MAC address from the phone’s bar code on the back of the phone.Why can’t I sign into the Skype for Business server on the phone?• Check your phone is properly connected to the switch or hub.• Ensure that your login credentials are correct.• Ensure network is avail;able.• Ensure tha date and time is correct.• Ensure that the phone has obtained the license.Why can't the phone pair with my Skype for Business client?• Ensure that your Skype for Business client is installed on your PC and a Skype for Business user signs into Skypefor Business server successfully.• Ensure that the user signing on the phone is the same as the one signing on the Skype for Business client.• Re-pair the phone and Skype for Business client manually.• Ensure that Yealink BToE Connector and application driver are successfully installed on your PC, and both ofthem start successfully. If the phone still cannot pair with the Skype for Business client, reboot the PC.• After a reboot, if the phone still cannot pair with the Skype for Business client, uninstall the Yealink BToEConnector and application driver, and then reinstall them.• Ensure that Yealink BToE Connector is an allowed program in your system’s firewall on your PC.Why can't I see the Calendar menu on the phone?It is possible that the phone is not connected to the Microsoft Exchange Server. Make sure that your sign into thephone using User Sign-in, Web Sign-In or Signing in via PC method.Why can't I get a dial tone?• Check for any loose connections and that the phone has been installed properly.• Switch between the Handset, Headset (if present) or Hands-Free Speakerphone to check whether the dial tone ispresent for one of the audio modes.• If the dial tone exists on another audio mode, connect a different handset or headset to isolate the problem.
