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DSC Tech Library
Glossary of Terms


telecommunications software solution This section of our technical library presents information relating to Call Center technology and Best Practices plus software and products. Since the Company's inception in 1978, DSC has specialized in the development of communications software and systems. Beginning with our CRM and call center applications, DSC has developed computer telephony integration software and PC based phone systems. These products have been developed to run on a wide variety of telecom computer systems and environments.

The following article relates to call center technology or customer service best practices and techniques.


[A ] [ B-C ] [ D-H ] [ I-M ] [ N-R ] [ S-V ] [ W-Z ]

Glossary B-C

Base Staff. Also called Seated Agents. The minimum number of agents required to achieve service level and response time objectives for given period of time. Seated agent calculations assume that agents will be ñin their seatsî for the entire period of time. Therefore, schedules need to add in extra people to accommodate breaks, absenteeism and other factors that will keep agents from the phones. See Rostered Staff Factor.

Basic Rate Interface (BRI). One of two basic levels of ISDN service. A BRI line provides two bearer channels for voice and data and one channel for signaling (commonly expressed as 2B+D). See Primary Rate Interface (PRI) and Integrated Services Digital Network.

Beep Tone. An audible notification that a call has arrived (also called Zip Tone). Beep tone can also refer to the audible notification that a call is being monitored.

Benchmark. Historically, a term referred to as a standardized task to test the capabilities of devices against each other. In quality terms, benchmarking is comparing products, services and processes with those of other organizations, to identify new ideas and improvement opportunities.

Best in Class. A benchmarking term to identify organizations that outperform all others in a specified category.

Blockage. Callers blocked from entering a queue. See Blocked Call.

Blocked Call. A call that cannot be connected immediately because A) no circuit is available at the time the call arrives, or B) the ACD is programmed to block calls from entering the queue when the queue backs up beyond a defined threshold.

Busy Hour. A telephone traffic engineering term, referring to the hour of time in which a trunk group carries the most traffic during the day. The average busy hour reflects the average over a period of days, such as two weeks. Busy Hour has little use for incoming call centers, which require more specific resource calculation methodologies.

Call. Also called Transaction and Customer Contact. A term referring to telephone calls, video calls, Web calls and other types of contacts.

Call Blending. Combining traditionally separate inbound and outbound agent groups into one group of agents responsible for handling both inbound and outbound contacts. A system that is capable of call blending automatically puts agents who are making outbound calls into the inbound mode and vice versa, as necessitated by the incoming call load.

Call By Call Routing. The process of routing each call to the optimum destination according to real-time conditions. See Percent Allocation and Network Inter-flow.

Call Center. An umbrella term that generally refers to reservations centers, help desks, information lines or customer service centers, regardless of how they are organized or what types of transactions they handle. The term is being challenged by many, because calls are just one type of transaction and the word center doesnÍt accurately depict the many multi-site environments.

Call Control Variables. The set of criteria the ACD uses to process calls. Examples include routing criteria, overflow parameters, recorded announcements and timing thresholds.

Call Detail Recording. Data on each call, captured and stored by the ACD. Can include trunk used, time in queue, call duration, agent who handled the call, number dialed (for outgoing), and other information.

Call Forcing. An ACD feature that automatically delivers calls to agents who are available and ready to take calls. They hear a notification that the call has arrived (e.g. a beep tone), but do not have to press a button to answer the call.

Call Load. Also referred to as Work Load. Call Load is the product of (Average Talk Time + Average After-Call Work) x call volume, for a given period.

Caller ID. See Automatic Number Identification.

Caller-Entered Digits (CED). Digits callers enter using their telephone keypads. The ACD, VRU, or network can prompt for CEDs.

Calling Line Identity (CLI). See Automatic Number Identification.

Calls In Queue. A real-time report that refers to the number of calls received by the ACD system but not yet connected to an agent.

Carrier. A company that provides telecommunications circuits. Carriers include both local telephone companies and long distance providers.

Cause-and-Effect Diagram. A tool to assist in root cause identification, developed by Dr. Kaoru Ishikawa.

CD-ROM. Compact Disc Read Only Memory. These discs hold as much as 660 megabytes of memory.

Central Office (CO). Can refer to either a telephone company switching center or the type of telephone switch used in a telephone company switching center. The local central office receives calls from within the local area and either routes them locally or passes them to an inter-exchange carrier (IXC). On the receiving end, the local central office receives calls that originated in other areas, from the IXC.

Centum Call Seconds (CCS). 100 call seconds, a unit of telephone traffic measurement. The first C is the Roman numeral for 100. 1 hour = 1 Erlang = 60 minutes = 36 CCS.

Chief Information Officer (CIO). A typical title for the highest ranking executive responsible for an organization's information systems.

Circuit. A transmission path between two points in a network.

Client/Server Architecture. A network of computers that share capabilities and devices.

Collateral Duties. Non-phone tasks (e.g., data entry) that are flexible, and can be scheduled for periods when call load is slow.

Common Causes. Causes of variation that are inherent to a process over time. They cause the rhythmic, common variations in the system of causes, and they affect every outcome of the process and everyone working in the process. See Special Causes.

Compliance. See Adherence to Schedule.

Computer Simulation. A computer technique to predict the outcome of various events in the future, given many variables. When there are many variables, simulation is often the only way to reasonably predict the outcome.

Computer Telephony Integration (CTI). The software, hardware and programming necessary to integrate computers and telephones so they can work together seamlessly and intelligently.

Conditional Routing. The capability of the ACD to route calls based on current conditions. It is based on "if-then" programming statements. For example, "if the number of calls in agent group 1 exceeds 10 and there are at least 2 available agents in group two, then route the calls to group two."

Continuous Improvement. The ongoing improvement of processes.

Control Chart. A control chart sifts out (identifies) two types of variation in a process, common causes and special causes. See Common Causes and Special Causes.

Controlled Busies. The capability of the ACD to generate busy signals when the queue backs up beyond a programmable threshold.

Cost Center. An accounting term that refers to a department or function in the organization that does not generate profit. See Profit Center.

Cost of Delay. The money you pay to queue callers, assuming you have toll-free service.

Cost Per Call. Total costs (fixed and variable) divided by total calls for a given period of time.

Customer Contact. See Call.