Version 7.0 297 Mediant 3000
User's Manual 16. Services
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 16-17: Designating ERLs and Assigning to ELINs
ERL Number Physical Area IP Address ELIN
1 Floor 1 10.13.124.xxx 503 972-4410
2 Floor 2 10.15.xxx.xxx 503 972-4411
3 Floor 3 10.18.xxx.xxx 503 972-4412
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.
16.7.3 AudioCodes ELIN Device for Lync Server 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 using ISDN PRI due to protocol limitations. To
solve this issue, Lync Server requires a device (ELIN SBC or Gateway) to send the E9-1-1
call to the SIP Trunk or PSTN. When Lync Server sends the PIDF-LO to the device, it
parses the content and translates the calling number to an appropriate ELIN. This ensures
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