Using this feature, users can place calls without the need to first dial a Feature Access Code (FAC), such as the number 9, to access an outside line. The system recognizes the call as an ARS or an AAR call, and accordingly uses the ARS or the AAR digit analysis and digit conversion tables to route the call. This enhancement was added to the Communication Manager Release 2.0.
This feature provides for the following additional calling options:
Public network dialing. This feature eliminates the need to enter a FAC to gain access to a public network facility or trunk. The typical application is apartments or assisted living complexes that want to provide the sense that users can directly dial the public network.
UDP networks. Many customers have large networks with 5-digit UDPs that have that have run out of numbers. With this feature, you can extend the network dial plan. The DCS feature transparency is available only with 4-digit and 5-digit dialing plans.
QSIG networks. The QSIG implementation does not require a 4-digit or a 5-digit UDP like DCS. An expanded private-network dial plan makes it easier to integrate the system into existing customer enterprise networks that are made up of non-Communication Manager systems. An expanded dial plan also facilitates those customers who want to convert a large DCS network to QSIG signaling protocol. DCS is not supported for private-network dial plans that are greater than 5-digits.
3-Digit UDP. ARS dialing without a FAC enables 3-digit UDP. However, DCS does not work in a dial scheme of less than 4 digits. For feature transparency, QSIG must be used for signaling.
Avaya recommends that you use ARS or AAR Dialing without a FAC only when users dial outside central office (CO) trunks. If you use this feature to expand dial plan lengths beyond 7-digits for internal extensions across a private QSIG or DCS network, some feature interactions might occur. Such interactions can include changes in the information that is shown on display telephones, telephony features, and call center features. ARS and AAR Dialing without a FAC is not tested against all possible feature interactions in an intraswitch networked environment. Avaya does not recommend ARS and AAR Dialing without a FAC for this use.
