The SIP Paging Adapter is a VoIP endpoint that interfaces analog paging systems with SIP and Multicast-based audio sources. The SPA (SIP Paging Adapter) can be configured to support two separate SIP extensions. SIP extension one passes audio through to the analog output spoken from the caller's handset. When called, SIP extension two plays a bell audio that can be used as a night ringer when configured in a night ring group.
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