Polycom SpectraLink 6100 MCU - Manual (Page 13)

SpectraLink 6000 System Overview
and, just like wired telephones, can receive calls directly, receive
transferred calls, transfer calls to other extensions, and make outside
and long distance calls (subject to the restrictions applied in your
facility.)
SpectraLink 6100 OAI Gateway
The SpectraLink OAI Gateway and application server are optional
components which enable third-party applications (such as nurse call
systems) to communicate with SpectraLink Wireless Telephones..
See SpectraLink 6100 MCU: Open Application Interface (OAI) Gateway
Installation and Configuration for more information.
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