Audiocodes Elin Gateway For Lync Server 2010 E9-1-1 Calls To Pstn - AudioCodes Mediant 3000 User Manual

User's Manual
The figure below illustrates the use of ERLs and ELINs, with an E9-1-1 call from floor 2 at
the branch office:
Figure 27-4: Implementing ERLs and ELINs for E9-1-1 in Lync Server 2010
The table below shows an example of designating ERLs to physical areas (floors) in a
building and associating each ERL with a unique ELIN.
ERL Number
1
2
3
In the table above, a unique IP subnet is associated per ERL. This is useful if you
implement different subnets between floors. Therefore, IP phones, for example, on a
specific floor are in the same subnet and therefore, use the same ELIN when dialing 9-1-1.

27.5.2.3 AudioCodes ELIN Gateway for Lync Server 2010 E9-1-1 Calls to PSTN

The Microsoft Mediation Server sends the location information of the E9-1-1 caller in the
XML-based PIDF-LO body contained in the SIP INVITE message. However, this content
cannot be sent on the PSTN network using ISDN PRI due to protocol limitations. To solve
this issue, Lync Server 2010 requires a PSTN Gateway (ELIN Gateway) to send the E9-1-1
call to the PSTN. When Lync Server 2010 sends the PIDF-LO to the PSTN Gateway, it
parses the content and translates the calling number to an appropriate ELIN. This ensures
that the call is routed to an appropriate PSAP, based on ELIN-address match lookup in the
Emergency Services provider's ALI database.
Version 6.8
Table 27-2: Designating ERLs and Assigning to ELINs
Physical Area
Floor 1
Floor 2
Floor 3
27. Configuring Supplementary Services
IP Address
10.13.124.xxx
10.15.xxx.xxx
10.18.xxx.xxx
467
ELIN
503 972-4410
503 972-4411
503 972-4412
Mediant 3000