CONFIGURATION MANUAL
Ascom d83 DECT Handset Maintenance
4.8 DECT Frequency Band Configuration
The Frequency Band Configuration is normally done during the first deployment of the device. It
can be changed only after a factory reset.
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 Administra-
tion, page 64, 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 4.3
Perform a Factory Reset, page 9.
To change the operating frequency band, perform the following procedure:
1. Enter the Admin Menu, see 6 Administration, page 64
2. Select Frequency band and select the desired band:
− EU US (default)
− LA (Latin America)
− Brazil
− 1900 - 1920 MHz
− Multifrequency (see also 4.8.1 Multiple Frequency Support, page 13)
− Taiwan
− Thailand
3. Restart the handset.
4. Register the handset.
The frequency band option is no longer available.
4.8.1 Multiple Frequency Support
The handset can be used in a system that changes frequency by selecting Multifrequency as frequency
band in the handset. See 4.8 DECT Frequency Band Configuration, page 13. This setting is applicable when
handsets are used in different geographical locations. For example, users working on ships that visit
different countries.
When the frequency band is set to Multifrequency and the handset is restarted, it adopts the frequency
band used in that particular region.
The handset adopts the frequency band configured in the DECT system.
The recommended procedure when changing frequency band is as follows:
1. The site administrator transmits a broadcast message to all handsets informing them that they need to
be restarted at a specific time.
2. The site administrator enters IP-DECT master and changes the frequency setting and carriers just
before the specified time.
3. All handset users restart their handsets.
After restart, the handsets will have the applicable frequency band.
TD 93426EN / 28 January 2022 / Ver. C
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