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1. The SIP phones: it is necessary to use the same credentials as the main registration so that the extensions do not change when a problem on the main IPBX occurs. ATTENTION: the SBA uses port 25060.
2. The Call groups: these can be configured so that the office can function normally – even when the connection to the main IPBX fails.
3. The SIP trunk: the trunk on which calls need to be made when the SBA is used. It can be a SIP connection to the gateway (which will have the same IP but with the port 5060) or a SIP trunk of a VoIP carrier.

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Updating the Configuration

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