Audiocodes Elin Device For Skype For Business E9-1-1 Calls To Pstn; Detecting And Handling E9-1-1 Calls - AudioCodes Mediant 800B User Manual

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 or PSTN network since they do not support such content. To solve this issue,
Skype for Business requires a device (ELIN SBC or Gateway) to send the E9-1-1 call to the SIP
Trunk or PSTN. 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
an appropriate PSAP, based on ELIN-address match lookup in the emergency service provider's
ALI database.
The figure below illustrates an AudioCodes ELIN device deployed in the Skype for Business
environment for handling E9-1-1 calls between the Enterprise and the emergency service
provider.

15.8.3.1 Detecting and Handling E9-1-1 Calls

The ELIN device identifies E9-1-1 calls and translates their incoming E9-1-1 calling numbers into
ELIN numbers, sent toward the PSAP. The device handles the received E9-1-1 calls as follows:
1. The device identifies E9-1-1 calls if the incoming SIP INVITE message contains a PIDF-LO
XML message body. This is indicated in the SIP Content-Type header, as shown below:
User's Manual
Table 15-26: Designating ERLs and Assigning to ELINs
Physical Area
Floor 1
Floor 2
Floor 3
Mediant 800B Gateway & E-SBC
IP Address
10.13.124.xxx
10.15.xxx.xxx
10.18.xxx.xxx
296
ELIN
503 972-4410
503 972-4411
503 972-4412
Document #: LTRT-10298