Name: Manual for MC850/MC851
Brand: HUAWEI
Availability: InStock

Troubleshooting and error codes

Symptom	Possible Cause	Solution
After you press , there is an off-hook tone. But after you pick up the handset, there is no off-hook tone.	The handset is not connected properly (applicable to the MC851).	N/A
During a call, you cannot hear the other party.	The microphone of the other party may be turned off.	N/A
	The volume of your speaker may be adjusted to 0.	(For details, see "Setting Sound" on page 48.)
During a video call, you cannot view the video of the other party or the other party cannot view your video.	The camera may be rotated to the bottom.	N/A
	The environment is too dark.	N/A
During a call, the other party cannot hear you.	Your microphone may be turned off.	N/A
	The volume of the speaker of the other party may be adjusted to 0.	(For details, see "Adjusting the Volume of the Speaker During a Call" on page 24.)
After the network is accessed through Wi-Fi, an icon indicating that the connection has failed appears in the status bar on the home screen.	The media phone may be out of range of the wireless signal.	View the icon indicating the Wi-Fi signal strength in the status bar to see whether there is any signal.
	If the Wi-Fi signal is strong, the possible cause may be that the Wi-Fi parameters are set incorrectly.	Please check the network access parameters. (For details, see "Setting the Network" on page 49.)
After the network is accessed through Wi-Fi, lagging, pausing, or erratic display of the video occurs during playing of IPTV videos.	The quality of the Wi-Fi signal may be poor.	Check the AP setting or set Network type to Ethernet. (For details, see "Setting the Network" on page 49.)
	If the preceding operation does not solve the problem, contact your service provider for help.	Contact your service provider for help.
The handset cannot be powered on.	The battery may be discharged or not installed properly.	Check whether the battery is installed properly. If the handset still cannot be powered on, charge the handset on the base unit for a few minutes, and then remove the handset and power it on.
	The battery is damaged.	If the preceding operations do not solve the problem, contact your service provider to replace the battery.
The handset can be powered on properly, but cannot access the base unit.	The base unit may be powered off or the power connection may be faulty.	Check whether the base unit works properly.
	Perhaps the handset has not been registered with the base unit or the registration information is lost.	In this case, re-register the handset with the base unit. (For details, see "Registering a Cordless Handset" on page 57.)
The handset works and accesses the base unit properly, but no dial tone is heard.	The connection of cables may be faulty.	Check whether the network cable is connected properly.
The handset works properly, but no number can be dialed.	Perhaps you have set the dialing mode of the handset to DTMF, but your line does not support this mode.	Select the pulsing dialing. (For details, see "Setting the Dialing Mode" on page 74.)
The handset works properly, but you hear beeps during calls.	The battery power is too low.	Check the battery power and charge the battery when necessary.
There are noise interferences in the calls when you are using the handset.	The handset may be too far from the base unit.	Try getting closer to the base unit with which the handset is registered. If multiple base units are available, you can also try registering the handset to the base unit that is closer to the handset.
The handset works properly, but does not ring upon incoming calls.	The volume of the ringtone is set to off.	Try setting the ringtone to a higher volume.
The handset can only receive calls and the keypad does not respond to your operations properly.	The keypad may be locked.	Try unlocking the keypad. (For details, see "Locking the Handset Keypad" on page 62.)
The battery efficiency is very low.	The charging pins may be not clean.	Try cleaning them.
	The battery life may have reached its end.	Contact your service provider to replace the battery.
The call disconnects automatically once you use the service of easy switch.	Your service provider may not support the service.	Please contact your service provider.
An error message is displayed when you import files from an external device to the local folder.	The memory of the base unit is not sufficient.	Make sure that the size of the files to be imported does not exceed 400 MB.
The media files stored on an external device cannot be played on the base unit.	The format of the media file may not be supported by the player in the media phone.	(For details, see "Playing Multimedia Files on the Media Phone" on page 35.
A file stored on the external devices cannot be played fully.	The format of the file may not be supported by the media phone.	N/A
The alarm does not ring.	The volume level may be set to 0.	N/A
The external storage device cannot be identified.	The media phone supports only the USB flash drive and the microSD card, and it does not support using other devices as USB devices.	N/A
A message saying NOT SUB or Searching is displayed on the LCD of the handset.	The handset is not properly registered to the media phone, please re-register.	(For details, see "Handset Registration" on Page 57.)

Manual for MC850/MC851

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Troubleshooting and error codes