| CPC H04W 36/305 (2018.08) [H04W 4/16 (2013.01); H04W 24/04 (2013.01); H04W 36/142 (2023.05); H04W 76/18 (2018.02)] | 9 Claims |

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1. A method for providing a fallback solution in a multi-tenant communication system, the method comprising:
communicating between a first RF site at a first radio-access network (RAN) and a second RF site at a second RAN through a first link through a cloud-based call-processing service;
replicating a first portion of a first database at the cloud-based call-processing service at a second database existing at the first RAN, wherein the first portion of the first database replicated at the second database comprises only radio and talkgroup configuration and call activity information for the first RAN;
determining that a second link through the cloud-based call-processing service has failed, wherein the second link established communication between a third RF site on the first RAN and a fourth RF site on the second RAN; and
implementing a fallback mode of communication for the third RF site using the replicated first portion of the first database, in response to the second link going down, wherein the fallback mode of communication:
drops communication between the third RF site and the cloud-based call-processing service;
establishes communication between the third RF site and a local call-processing service;
allows communication between the third RF site and other RF sites existing only at the first RAN through the local call-processing service; and
allows the first RF site to communicate through the cloud-based call-processing service.
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