Symptom 1: My WT8288 is not in the normal standby state (that is, the LCD never displays IP Phone…), and the dial tone cannot be heard when I pick up the handset.
Solution:
1) Check to see if the LAN indicator on the rear of the base lights. If it does not, check that:
l The two ends of the network cable are completely and securely plugged into the LAN interface of your WT8288 and the corresponding port of the access device.
l The network connection type is properly set (refer to section 7.2 Quick Network Setting for details).
l You are experiencing other network problems if the above two are OK. Consult your carrier or the administrator for help.
2) Check to see if the protocol settings are configured according to the protocol parameters your carrier or the administrator provides. Before using your WT8288, you must configure the protocol parameters correctly to make it register with the carrier’s server. Refer to APPENDIX Ⅰ, Ⅱ, Ⅲ for details.
3) Check to see if the two ends of the handset cord are completely and securely
plugged into the handset and the base.
Symptom 2: Loud noise can be heard during a call.
Solution: Check to see if the volume is too high. Refer to section 5 “Voice Settings” for details on setting the volume.
Symptom 3: The voice is too tiny to be heard.
Solution: Increase the output volume by pressing <UP> during a call. Refer to section 5 “Voice Settings” for details on setting the volume.
Symptom 4: With DMZ enabled, external hosts cannot access the DMZ host.
Solution: Check to see if port conflicts occur. This is caused that the port range set in the DMZ configuration contains the port used by the services your WT8288 provides.(refer to section IV. “Configuring DMZ and static port mapping” for details).If yes, set the range to exclude these ports.