Understanding Why Telephones in the United Kingdom Connected to Cisco FXS Interfaces May Fail to Ring  [Telephony Signaling] - Cisco Systems

Understanding Why Telephones in the United Kingdom Connected to Cisco FXS Interfaces May Fail to Ring [Telephony Signaling] - Cisco Systems

n the UK certain British Approval Board for Telecommunications (BABT) telephones fail to ring when they are connected to FXS ports on Cisco voice-enabled routers and switches. Outgoing calls can be made and voice communication in both directions can be established, however with incoming calls, the telephones will not ring. These telephones functioned correctly before being connected to the FXS ports.

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