Aastra M720 Installation Manual page 290

10.2.2.3 Using your phone for the first time
Charge the storage batteries for about 4 to 6 hours before using the handset for the first time. This
protective measure prolongs the service life of the storage batteries. The maximum power of the
storage batteries is reached for the first time after three to five charging and discharging cycles.
Regularly place the handset on the charging station in order to obtain optimum charging of the
storage batteries.
The handset is ready for operation only after the first charging; you can then make and receive
calls with the handset.
10.2.2.4 Duration of charging and use:
Charging time: (empty storage batteries) full capacity - 4 to 6 h
Conversation time: up to 5 h (with full charging)
Standby mode: up to 50 h (with full charging)
10.2.2.5 Inserting the storage batteries
The storage batteries are solidly fixed to the handset compartment cover. To activate the phone,
insert the batteries as shown in the following illustrations.
Inserting the storage batteries
After inserting the MEM card (see next page), if it
is not already present: Slightly incline then put on
the cover (1) and close it (2) until it is well
engaged.
Removing the storage batteries
To unlock the storage battery compartment
cover, use an appropriate pointed object (for
example, a ball pen) and insert it in the hole
located at the bottom of the handset (1). Raise
the cover simultaneously, as shown in (2).
Note:
Switch off the handset before removing the storage batteries to avoid loss of data.
AMT/PTD/TR/0001/3/7/EN
Page 10-8
Installation Manual for digital sets - IP sets - SIP sets
05/2008 Aastra Phone 312