Audiocodes Elin Device For Skype For Business E9-1-1 Calls To Pstn - AudioCodes Mediant 4000 SBC User 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 15-59: ERLs and ELINs for E9-1-1 in Skype for Business
The table below shows an example of designating ERLs to physical areas (floors) in a
building and associating each ERL with a unique ELIN.
Table 15-25: Designating ERLs and Assigning to ELINs
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.
15.8.3 AudioCodes ELIN Device for Skype for Business E9-1-1 Calls to
PSTN
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 SIP Trunk since they do not support such content. To solve this issue,
Skype for Business requires a device (ELIN SBC) to send the E9-1-1 call to the SIP Trunk.
When Skype for Business sends the PIDF-LO to the device, it parses the content and
translates the calling number to an appropriate ELIN. This ensures that the call is routed to
User's Manual
Physical Area
Floor 1
Floor 2
Floor 3
296
Mediant 4000 SBC
IP Address
10.13.124.xxx
10.15.xxx.xxx
10.18.xxx.xxx
Document #: LTRT-40203
ELIN
503 972-4410
503 972-4411
503 972-4412