| more topics
|
ARS restrictions (FRLs) operate independently of dial-access-to-pool restrictions, providing greater flexibility in assigning the type of usage an extension is allowed.
The international dialing code (011) can be included in a local exchange or 6-digit table. If this is done, calls beginning with 011 are routed according to the table on which 011 is entered, and not according to the Dial 0 Table.
A non-local system's ARS access code must not be included in the non-local dial plan. To do so would allow users to dial out of the remote networked systems, bypassing local restrictions. If you attempt to include the local system's ARS access code in the non-local dial plan, the programming is blocked. In a network, it is recommended that all systems use the same ARS access code. For additional information, see "Tandem Switching" on page 761 and "Uniform Dial Plan Features" on page 804.
Calls made to the equal access code (10xxx) are always routed immediately over the main pool, whether or not they appear in other ARS tables. People who are restricted from using a particular ARS route hear a high-low error tone, indicating that the call cannot be completed.
|
|
Special planning is required for equal access calls (also called IXC or Interexchange calls), N11 calls, and Dial 0 calls from systems that are not connected to the public switched telephone network. See Tandem Switching for details. |
Even if the local telephone company does not require it, callers must dial 1 before any 10-digit telephone number, so that ARS can determine whether a call is toll or local. If the 1 is not required by the local central office, the system may be programmed to ignore it.
Some central offices still require the prefix 1 for dialing certain exchanges. If the 1 + 7-Digit Dialing Requirements option is programmed as Within Area Code, the system expects either dial time-out or a # (end of dialing) to indicate whether a 1 + 7-digit or a 1 + 10-digit number has been dialed. (This may result in delays while the user waits for time-out.) To avoid time-out delays, 1 + 7-Digit Dialing Requirements can be programmed as Not Within Area Code, but all exchanges requiring a system-prefixed 1 must be listed in a local exchange table, and the 1 must be specified as a character to be prefixed. In this case, users must not dial the 1 before dialing those exchanges.
Area Codes 800 and 900 are treated as entries in programmable tables. They may be programmed either as area codes or as exchanges.
You can direct 911 calls over a private network by prepending partition or system prefixed digits with the ARS access code for the remote MERLIN MAGIX system. Incoming private network calls are sent over the main pool.
|
|
Send 911 calls over a private network only when the systems are at the same location and when the main pool's trunks' ALI provides enough information for a rapid response from Emergency Service. |
Do not assign E&M TIE trunks to be E911 Adjunct trunks.
All E911 routes have a Facility Restriction Level (FRL) of 0.
E911 calls are routed through the main pool when any of the following occur:
A 911 call to a disconnected or bad E911 trunk will fail. To prevent further failures of this trunk, the system marks the trunk as E911 Trunk Maintenance Busy and does not use the trunk while it is in an E911 Trunk Maintenance Busy state.
Assign at least two trunks to any partition to minimize overflowing to the main pool.
E911 service cannot be provided if "911" is an entry in a local exchange table.
The system prefixed digits can be programmed for each E911 Partition call but not for E911 Adjunct calls.
If the ARS Special Numbers Table needs system prefixed digits, the E911 Table may also need system prefixed digits for calls that overflow to the main pool.
Enable Trunk Maintenance Busy to allow the system to perform background checks on all ground-start, loop-start, and E&M tie trunks used for E911 service.
An Outward or Extension Status (ES) Restricted user cannot call 911. Assign an Allowed List with "911" to the restricted extensions.
A Night Service Restricted caller cannot dial 911. Program a Night Service Emergency Number for 911.
When Allow-11 is enabled and the ARS access code is "9," the system
routes both "911" and
"9-911" calls through the E911 table. If Allow-11 is enabled and the
ARS access code is "9," rotary-dial lines cannot use "11"
for star ( * ) codes.
When the system mode changes from Hybrid/PBX mode to Key or Behind Switch mode, E911 programmed returns to the factory setting of all extensions assigned to Partition 1.
If you try to program the following trunks as an E911 Partition or E911 Adjunct trunk, you hear an error beep and are denied programming the trunk:
In addition, an error beep sounds when you try to program the following as E911 Adjunct trunks:
