User Manual

User Guide for the SIP-T21(P) E2 IP Phone
132
How to obtain the MAC address of a phone when the phone is not powered on?
Three ways to obtain the MAC address of a phone:
 You can ask your supplier for the shipping information sheet which includes MAC
addresses according to the corresponding 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 get a dial tone?
 Check for any loose connections and that the phone has been installed properly.
For the installation instructions, refer to Phone Installation on page 11.
 Switch between the Handset, Headset (if present) and Hands-Free Speakerphone
to check whether the dial tone is present 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.
Why doesn’t the phone ring?
Check the ringer volume on the phone. To adjust the ringer volume setting, press the
Volume key when the phone is on-hook and idle. For more information, refer to Volume
on page 27.
Why can’t I receive calls?
 Check the SIP registration with your system administrator.
 Check that DND (Do Not Disturb) mode is deactivated on your phone. Refer to Do
Not Disturb (DND) on page 80.
 Check that call forward is disabled on the phone. Refer to Call Forward on page
83.
 Check whether the caller number is stored in the blacklist directory. Refer to
Blacklist on page 41.
Why is my handset not working?
Check that the handset cord is fully connected to both the handset jack on the phone
and handset. Refer to Phone Installation on page 11.
Why is my headset not working?
 Check that the headset cord is fully connected to the headset jack on the phone.
Refer to Phone Installation on page 11.
 Check that the headset mode is activated. Refer to Headset Mode