NEC Univerge SV8100 Features And Specifications Manual page 624

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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 Program 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 Program 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 Program 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 Program 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.

Dial Number Preview is when a telephone number is first dialed (previewing the number in the display)

then Speaker or a line key is pressed to place the call.

If Program 21-01-10 is programmed with an entry other than 0, a call does not have a talk

path unless the user dials at least the number of digits entered in this option when placing

an outgoing call. This means that an entry of 4 or higher in this program causes a problem

when dialing 911. Since it is only a 3-digit number, the call does not have a talk path,

preventing the emergency dispatcher from hearing the caller. This option should be kept at

its default setting of 0 to prevent any problem with dialing 911.

CAMA Trunks are not supported.

If a 911 call originates from a Virtual Extension, the system sends the Virtual Calling Party

Number (CPN) Presentation from Station (Version 3000 and lower software).

UNIVERGE SV8100

E911 Compatibility