Aastra Telecom MBU 400TM manual Installing the MBU

4.Place the handset in the charger, and charge the battery. We recommend that you charge the battery fully before first use. This takes approximately 10 hours. When you place the handset in the charger, the handset automatically registers with the MBU, provided you have just reset the MBU. Place the handset near the MBU during the registration process.

Note: After registration of the first handset, there is a 5-minute period during which you can register any additional hand- sets. If you want to register additional handsets after the 5-minute period has expired, press the Reset button once (do not hold down) on the rear of the MBU to start a new 5-minute registration period.

Installing the MBU 400

MBU 400 Installation Guide 17