Instruction manual

Generalized route selection
Issue 4 May 2003 161555-233-767
Automatic Route Selection (ARS)
Automatic Route Selection (ARS) selects carriers automatically and routes calls
inexpensively over the public network. When there are one or more long-distance
carriers and Wide Area Telecommunications Service (WATS) provided,
Communication Manager selects the most preferred route for the call.
Long-distance carrier-code dialing is not required on routes selected by the
system. You assign long-distance carrier-codes and Communication Manager
translates them. The system inserts codes as needed to guarantee automatic-carrier
selection. ARS can route calls to a variety of types-of-numbers and access a
variety of types of trunk groups.
AAR/ARS overlap sending
Communication Manager supports overlap sending for AAR and ARS calls that
are routed over ISDN-PRI trunk groups. ISDN-PRI call-address information is
sent one digit at a time instead of in one block. In countries with complex
public-network numbering plans, this allows for a significant decrease in call
setup time. When overlap receiving is enabled, this is especially significant for
tandem calls.
AAR/ARS partitioning
Allows AAR and ARS to be partitioned into 8 user groups within a single system
and provides individual routing treatment for each of these user groups.
User groups share the same Partition Group Number, which indicates the choice
of routing tables that are used on a particular call. Each Class of Restriction
(COR) is assigned a specific Partition Group Number or Time of Day
specification. Different classes of restriction may be assigned the same Partition
Group Number.
Generalized route selection
Provides voice and data call-routing capabilities. You use it to select not only the
least-cost routing, but also optimal routing over the appropriate facilities. It
enhances AAR and ARS by providing additional parameters in the routing
decision and maximizing the chance of using the right facility to route the call.
Also, if an endpoint incompatibility exists, it provides a conversion resource (such
as a modem from a modem pool) to attempt to match the right facility with the
right endpoint.