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ACD systems are often found in offices that handle large volumes of incoming Phone Call s from callers who have no specific need to talk to a certain person, but want to talk to a person who is ready to serve at the earliest opportunity. Routing incoming calls is the task of the ACD system. The system consists of hardware for the terminals and switches, phonelines, and software for the routing strategy. The routing strategy is a rule based set of instructions that tells the ACD how calls are handled inside the system. Most of the time this will be a set that determines the best available employee for a certain incoming call. To help make this match, extra variables are taken into account, most often to find out why the customer is calling. Sometimes the caller's Caller ID or ANI is used, more often a simple Interactive Voice Response is used to just ask for the reason. ACD servers can cost anywhere between a few thousand dollars to close to millions of dollars for a very large Call Center handling thousands of calls per day. Originally, the ACD function was internal to the PBX of the company. However, the closed nature of these systems limited their flexibility. A system was then designed to enable common computing devices, such as server PC's, to take the routing decisions. For this, generally the PBX would issue information about incoming calls to this external system and receive a direction of the call in response. One of the first large and separate ACDs was a modified 5XB Switch used by New York Telephone in the early 1970s to distribute calls among hundreds of 4-1-1 information operators. An additional function for these external routing applications is to enable CTI . This allows improved efficiency for Call Center agents because they are offered phone calls with relevant data at the same time on their PC. A common protocol to achieve this is CSTA , however, almost each PBX vendor has its own flavour of CSTA, and CSTA is quite hard to program because of its complex nature. Various vendors have developed intermediate software that hides these complexities and offers programmers a short time to market for their application. Also, these protocols enable Call Center s consisting of PBXs from multiple vendors to be treated as one virtual contact center. All real-time and historical statistical information can then be shared amongst call center sites. SEE ALSO |
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