AudioCodes Mediant 500 E-SBC, User Manual

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User's Manual 26. Configuring Supplementary Services
Version 6.8 421 Mediant 500 E-SBC
Microsoft Location Information Server (LIS). The LIS stores the location of each network
element in the enterprise. Immediately after the Lync 2010 client registration process or
when the operating system detects a network connection change, each Lync 2010 client
submits a request to the LIS for a location. If the LIS is able to resolve a location address
for the client request, it returns the address in a location response. Each client then caches
this information. When the Lync 2010 client dials 9-1-1, this location information is then
included as part of the emergency call and used by the Emergency Services provider to
route the call to the correct PSAP.
The gathering of location information in the Lync Server 2010 network is illustrated in the
figure below:
Figure 26-2: Microsoft Lync Server 2010 Client Acquiring Location Information
1. The Administrator provisions the LIS database with the location of each network
element in the Enterprise. The location is a civic address, which can include
contextual in-building and company information. In other words, it associates a
specific network entity (for example, a WAP) with a physical location in the Enterprise
(for example, Floor 2, Wing A, and the Enterprise's street address). For more
information on populating the LIS database, see ''Adding ELINs to the Location
Information Server'' on page
422 .
2. The Administrator validates addresses with the Emergency Services provider's MSAG
–a companion database to the ALI database. This ensures that the civic address is
valid as an official address (e.g., correct address spelling).
3. The Lync 2010 client initiates a location request to the LIS under the following
circumstances:
•
Immediately after startup and registering the user with Lync Server 2010
•
Approximately every four hours after initial registration
•
Whenever a network connection change is detected (such as roaming to a new
WAP)
The Lync 2010 client includes in its location request the following known network
connectivity information:
•
Always included:
♦
IPv4 subnet
♦
Media Access Control (MAC) address
•
Depends on network connectivity:
♦
Wireless access point (WAP) Basic Service Set Identifier (BSSID)
♦
Link Layer Discovery Protocol-Media Endpoint Discovery (LLDP-MED)
chassis ID and port ID