![](/images/new-backgrounds/1326682/32668237x1.webp)
Label (Continued) | Description (Continued) |
|
|
VOIP | Remains lit when the MBU is connected to an Internet |
| Telephony Service Provider. |
CALL | Remains lit when a call is in progress (for both landline and |
| Internet calls). |
| Flashes during firmware updates. |
|
|
RESET | Press to reboot the unit, activate configuration changes, and |
(side panel) | enable handset registration mode. |
| Press and hold 15 seconds to reboot with factory default |
| settings. All front panel lights come on when a factory restart is |
| initiated. |
| NOTE: Configuration settings are lost during a factory default. |
|
|
DC | Indicates the power connection. |
(side panel) |
|
LAN | Indicates the Internet port. |
(side panel) |
|
LINE | Indicates the Telephone Line Connection port (PSTN). |
(side panel) |
|
Registering the 420d Handset
Each handset must be registered with your MBU 400 gateway before it can be used. If the handset is not registered, one of the following message appears on the handset displays:
Searching for Gateway
or
Please place handset in charger to start
To register your handset do the following.
1.Ensure the base unit is connected to power.
2.Place the handset in the charger.
3.If the handset does not register automatically, press and release the RESET button on the side of the MBU 400.
Pressing RESET reboots the MBU, following which it remains in registration mode for 5 minutes. More than one handset can be registered in this period. To start a new 5 minute registration period, press and release the RESET button again.
Successful registration ends with the idle screen on the handset as shown in the section Handset Idle Screen on page 25.
Note: If you encounter problems registering your handset, try removing the handset from the charger and replacing it, then resetting the MBU once again. If you have changed the gateway access code, see Changing the Access Code on the Handset on page 29 to change the handset access code so it matches the gateway.
Handsets can be registered and
Getting Started
Aastra MBU 400 User Guide | 19 |