Specifications

Spectralink 84-Series with AudioCodes Gateway and Avaya Communication Manager: Interoperability Guide
1725-86914-000_C.docx
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How Stand Alone Survivability Application Works
The SAS application is an optional capability of the Mediant Gateway but is mandatory for the
Spectralink solution. It is a robust solution originally designed for system redundancy but this
document only describes its application to the Spectralink solution.
SAS Emergency State
The Spectralink Mediant Gateway solution operates the SAS application, permanently, in the
Outbound Proxy mode in the emergency state. This means Spectralink SIP handsets use the
Mediant Gateway SAS application as a proxy and calls are routed via the Mediant Gateway
trunk to the PBX.
When the Mediant Gateway receives calls from a SIP device, it searches its SAS registration
database to locate the destination address (according to AOR or Contact). If the destination
address is found in the SAS registration database, the call is placed to the other SIP device and
no PBX functionality is required. If the destination address is not found, i.e. it is not another SIP
device registered on this Mediant Gateway, the SAS application forwards the call to the core
Mediant Gateway application, which in turn routes the call across the TDM trunk to the PBX.
User Authentication
Access to the Mediant Gateway from the Wi-Fi handsets is screened by the security
mechanisms of Wi-Fi access points.
Basic SAS functionality does not authenticate users. It accepts all valid registrations which
would theoretically allow one handset to emulate a different one.