How do calls access the ARS routing tables?

Calls access the Automatic Route Selection (ARS) routing tables through the Feature Access Code. This mechanism allows users to enter specific codes on their phones that instruct the system to utilize the ARS for making calls. By entering the appropriate Feature Access Code, the call can be analyzed and routed according to the rules defined in the ARS tables, ensuring that calls are directed efficiently based on the configuration set by the system administrators.

The Feature Access Code serves as an entry point for leveraging various telephony features, including ARS, effectively allowing users to dictate how their calls are processed. This capability plays a significant role in call management, helping to optimize call routing based on cost, availability, and predetermined preferences.

Other methods mentioned, such as the Toll Analysis table and the Public Unknown Numbering table, serve different purposes in call routing and number management but do not directly facilitate access to the ARS routing tables. Dial Plan Parameters also serve a function in the overall call routing architecture but are not the primary mechanism for accessing ARS directly.