Provisioning Esa Calls For A Central Deployment; Emergency Service Using Special Numbers (Spn) - Avaya 1000 Installation And Commissioning Manual

Emergency Services configuration

Provisioning ESA calls for a central deployment

The challenge for provisioning ESA calls for a central deployment is that there are not enough
ESDNs available for addressing the need of different ESDNs for a large number of sites. There had
been only one ESDN available per system. The number was increased to 16 since Release 5.0 but
is still not enough for larger deployments.
To resolve this issue, some digit manipulation is required. One ESDN is configured with a number
that is not a real emergency number and is not conflicting with other DNs, 111 for example. Then,
when a local emergency number is dialed (911, 999, 112, and so on) it is converted to 111 and the
ESA processing engages. Based on the ERL number configured for the originating set, the route list
is retrieved from the corresponding ERL table. In that route list, 111 is changed back to the local
emergency number before it is sent to the PSAP. The process is illustrated in the following example:
Call scenario: Dial local ESN 911 from DN 3013100 Houston.
1. Configure ESA with ESDN = 111 in LD 24
2. Configure ESDN conversion in the ZFDP table from 911 to 111 for the originating site
Chg ZFDP 1 911 ESDN 111 LEN 3 'Houston Emergency Services DN"
3. Configure a route list in LD 86 as follows. This route list is going to be entered in the ERL
table for routing the ESA call over a trunk.
RLI 8 Route 3 (route to PSAP) DEL 3 INST <AC1/AC2>911
For routing the call to a gateway, the route list is configured as follows:
RLI 8 Route 2 (route over VTRK to GW) DEL none INST 00301
The call is routed to the gateway (GW) as 00301111. The GW converts the number to 911
with the following SPN:
SPN 00301111 RLI 9 LTER = YES DEL 8 INST 911
911 is configured in the GW as an Emergency Service DN (ESDN) and the call is routed to
the Public Safety Answering Point (PSAP).

Emergency Service using Special Numbers (SPN)

Determining the dialing plan for emergency access calls is critical.
In many jurisdictions, the emergency number is a fixed number (for example, "112" or "999"). The
call processor (main office Call Server or MG 1000B CP PM) cannot have a DN that conflicts with
these digits. To dial the emergency number in this configuration, a Branch Office user must dial the
appropriate Access Code. For example, if AC2 is 9, then the user must dial "9 999" to make a call to
emergency services.
Branch Office Installation and Commissioning
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Comments? infodev@avaya.com
June 2014