Emergency 911 Calling

If WNDP dialing is administered to use the digits 91 as a FAC, this FAC conflicts with dialing 911 to reach an emergency service agency. If a user dials 911 with WNDP enabled, the call does not go through to the emergency service agency because the system is waiting for more digits after dialing 91.

To work around this interaction, you can take all or any the following actions:

• Instruct users to first dial the ARS FAC and then dial 911. For example, if the ARS FAC is 8, a user can dial 8911. This option works for any emergency number, such as 999 in the United Kingdom.

• Instruct users to dial the assigned WNDP FAC followed by 911. For example, if one of the WNDP FACs is 92, a user can dial 92911. This option works for any emergency number, such as 999 in the United Kingdom.

• Administer a WNDP Emergency 911 Route String. This route string is outpulsed when a user dials either 911 and waits for the interdigit timeout, or dials 911 and then presses #. This dialing option works only when the WNDP Flash FAC is 91.

  If the telephone that you use for an emergency call does not have adequate calling permissions, the emergency call does not go through. This situation can happen in the following conditions:

• The Facility Restriction Level (FRL) of the telephone is not high enough.

• The precedence calling level of the telephone is not high enough.

• The telephone cannot use a higher precedence level for the call.

• No trunk facilities are available, and the precedence level of the call is not high enough to preempt another call.

• The hop limit is exceeded when call is routed over tandem trunks.

Hunting

When you administer a hunt group with preemption, set the Maximum Preemption Level field and the Preemptable field in the Class of Restriction screen. The hunt group Group Type must use circular or ucd-mia queuing, and the ACD, the Queue, and the Vector fields must be set to n.

Precedence Calling

When WNDP is enabled, users must dial a FAC for the precedence level that the users want to use. Users cannot use the Precedence Calling FAC. In addition, the Route Code function and the implied precedence level are provided.

When WNDP is disabled, users must dial the Precedence Calling FAC, and then the precedence level, a number between 0 and 4. The WNDP FACs can be administered, but cannot be used.