NEC SL1100, Features And Specifications Manual

Page: 278 / 864

E911 Compatibility
Description
IMPORTANT - PLEASE NOTE THE FOLLOWING!
1. When ARS is NOT enabled and the system allows trunk access by dialing 9 , Single Line Terminals disre-
gard PRG 20-03-03 - System Options for Single Lines Terminals - SLT DTMF Dial to Trunk Lines. This prevents
the system from connecting to a trunk until all the digits are dialed. This can be avoided by using either 8 or 9x
(but not 91) as the trunk access code. Be aware that this change requires additional programming changes.
2. Do not use * in a PBX access code if the Account Code feature is used. With the Account Code feature
enabled, if this is used in the access code, the trunk stops sending digits to the central office after the * is sent.
3. Finally, but most importantly, TEST - TEST - TEST!! Due to the nature of the E911 feature, it is imperative that
when programming this, or any other feature, to be aware of the consequences. Make sure to test the extensions
with the E911 feature to confirm that other features do not prevent the call from being completed. When using
external equipment, make sure the dial treatment tables are working properly.
E911 Compatibility ensures that emergency calls always get through. If an emergency occurs, a user
goes to any telephone, lifts the handset and dials 911. The system built-in E911 Compatibility places
the emergency call even if the user forgets to dial an access code or press a line key. The E911
abilities include:
• Attendant Notification
The attendant receives a notification each time a co-worker dials an emergency 911 call. This
notification is the co-worker’s name and number display optionally accompanied by an audible
alarm. Notification occurs regardless of whether the attendant is idle or busy on a call. You can
optionally extend this ability to other supervisory extensions as well.
• Emergency Routing
When an extension user dials 911, the system can automatically find a trunk for the call. The system
can choose a route to which the user normally does not have access. If all normal routes are busy,
the system can even disconnect an active call and place the emergency call. E911 Compatibility
uses the flexibility of the Automatic Route Selection Call Route Options to route 911 emergency
calls (even in systems in which ARS is not enabled).
- E911 Outgoing Dialing
The E911 call follows the trunk group route programming. It is possible to use the flexibility of the
Automatic Route Selection Call Route Options for additional routing options.
- Forced Disconnect Follows Timer to Disconnect Call
When all lines in the programmed route are busy and the system must drop a call to place a 911
call, the system waits the time set in PRG 81-01 before disconnecting the call.
• Calling Party Identification
With ISDN installed, the system can provide the Calling Party Number (CPN) Presentation from
Station. No additional customer-provided 911 equipment is required.
Uninstalled Trunks in Trunk Group Prevent Call from Dialing Out
By system default, all trunks in PRG 14-05-01 Trunk Group are in group 1. When placing a 911 call,
the system tries to access the trunks defined in the group. If the trunks do not exist, the call does not
dial out. For E911 to function correctly, remove any uninstalled trunks from the trunk group.
If PRG 21-01-12 : System Options for Outgoing Calls, Dial 911 Routing Without Trunk Access is set to
0 (trunk access code required), when using the Dial Number Preview feature and dialing 9+911, if all
trunks are busy, the user hears a busy signal and the call does not dial out.
If option PRG 21-01-12 is set to 1 (trunk access code not required) and using Dial Number Preview,
911 is dialed, the system disconnects a trunk and dials the call.
SL1100 ISSUE 2.0
1-266 E911 Compatibility
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