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Until recently subcarrier wave quant um communication (SCWQC) systems, which are robust against external conditions and possess unmatched potential for quantum channel multiplexing [1] have only been tested in point-to-point setups, mainly due to relative complexity of SCWQC architecture. In this work we report construction of the first multiuser quantum network fully based on SCWQC method. The experiment allowed to demonstrate longterm stability of several SCW devices intercommunicating in metropolitan infrastructure. This work is a result of collaboration between KNRTU-KAI and ITMO universities and telecommunication operator PJSC Tattelecom. The network connects four nodes in Kazan city (Russia): two buildings of KNRTU-KAI campus (Nodes 1 and 2) and two Tattelecom offices (Nodes 3 and 4). It implements star topology and thrusted repeater paradigm. Three receiver modules are located in …