ISDN-ASPEN - An ISDN Performance Evaluation Tool

TO characterize the end-to-end performance of AT&T's ISDN BRI services, a system called ISDN-ASPEN was developed. ISDN-ASPEN is a flexible, automatic data acquisition and analysis system built on the UNIX(R) Operating System. This system has the ISDN interface which provides the capability to measure voice and data services performance at the customer's premises. The performance parameters include post dialing delay, clear confirmation delay, customer usages, bit error rate, data transfer delay, and echoplex delay. The ISDN-ASPEN system consists of remote test modules under the control of a centralized host computer. This paper describes the system architecture and capabilities of ISDN-ASPEN and a post dialing delay example is presented.