Matrix Telecom SARVAM UMG System Manual page 257

When you change the Frequency Band, the change will take effect after the next system restart or the next
Mobile Port restart.
• If your SARVAM UMG has a 4G Mobile Port, the SIM Card of this port will get registered with either GSM
(2G) or UMTS (3G) or LTE (4G) network, whichever is available. You can select the Network with which
the SIM should be registered by setting the Preferred Network Mode.
If the SIM installed in the Mobile Port supports GSM, UMTS and LTE services, and you wish the SIM to get
registered with only one of these networks, you can restrict the other network by setting the Preferred
Network Mode — Any, UMTS, GSM or LTE.
• Any: If you select this option, the SIM will automatically register with the available network, that is,
UMTS (3G) or GSM (2G) or LTE (4G). For example if you have a 3G SIM and 3G network is not
available it will automatically fall-back to 2G network.
• UMTS: Select this when you want the SIM to get registered with UMTS (3G) network only.
• GSM: Select this when you want the SIM to get registered with GSM (2G) network only.
• LTE: Select this when you want the SIM to get registered with LTE (4G) network only.
Default: Any.
If you select the Preferred Network Mode as LTE only, calling functionality will be possible only if the
Service provider supports calling through VoLTE.
If your Mobile Port supports GSM only, do not change the default value of this parameter.
• Select the desired Network Selection mode — Automatic or Manual. Default: Automatic.
• Select Automatic when you want the Mobile Port to automatically locate and register with the Network
that supports the SIM card. At each power ON, the SIM in the Mobile Port will automatically register
with the Network.
• Select Manual when you want the Mobile Port to select the network operator according to the priority
set by you. You also need to configure the list of network operators as per your preference.
To apply Manual Network Selection,
• Select Manual and click Settings
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Matrix SARVAM UMG System Manual