TD 92674EN
29 April 2015 / Ver. I
Configuration Manual
Ascom d81 DECT Handset
17
4. Maintenance
4.9 DECT Frequency Band Configuration
NOTE: The frequency band configuration can only be done once and is only needed if the
handset is used in other frequency bands than the default (EU US China). In special
cases a new configuration might be needed after repair services.
To change the operating frequency band, the following preconditions must be fulfilled:
• The frequency is set to Not initiated. This can be checked by entering the Admin menu,
see
6. Administration on page 62, follow the path:
Admin menu > Device info > Hardware.
Scroll down to “Frequency band”.
• The handset must not have a DECT registration. If it already has, perform a Factory reset,
see
4.5 Perform a Factory Reset on page 14.
1 Enter the Admin Menu, see 6. Administration on page 62.
2 Select "Frequency band" and select the desired band.
• EU US China (default)
• LA (Latin America)
•Brazil
• 1900 - 1920 MHz
• Multifrequency (see also 4.9.1 Multiple Frequency Support)
•Taiwan
• Thailand
3 Restart the handset.
4 Register the handset.
5 The frequency band option is no longer available.
NOTE: The selection is persistent and can withstand a factory reset.
4.9.1 Multiple Frequency Support
The handset can be used in a system that changes frequency by selecting “Multifrequency”
as frequency band in the handset. See 4.9 DECT Frequency Band Configuration. This setting
is applicable for handsets used in different regions of the world. For example for users
working on a ship that visits different countries.
When the frequency band is set to "Multifrequency", the handset adapts to the applicable
frequency band (EU, US or Brazil) used in the specific region after it has been restarted.
NOTE: The handset adapts to the frequency band configured in the DECT system.
The recommended procedure when changing frequency band is as follows:
1 The site administrator sends out broadcast message to all handsets informing that
the handsets need to be restarted at a specific time.
2 The site administrator enters IP-DECT master and change setting for the frequency
and carriers just before the specific time.
3 All handset users restart their handsets.
After the restart the handsets have changed to the applicable frequency band (EU, US or
Brazil).
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