Introduction

The Call Stacker is a microprocessor based audio

recording and announcement system. The Call Stacker is used in conjunction with a paging system to provide buffered announcement play to the paging system.

NOTE: Associated equipment would need

to be powered by an

uninterrupted power supply.

Figure 1-1. Call Stacker Unit

The Call Stacker features 5 Input Station (recording) channels, a single Page Output channel and 3 minutes of recording time.

Up to 5 announcements can be recorded simultaneously, virtually eliminating frustrating delays encountered when accessing the paging system. The recorded announcements are queued in order so the first announcement recorded that has hung up, plays first, followed by the second announcement, etc.

The Call Stacker allows users to verify their announcements before they play to the paging system. If a user is not content with their recorded announcement, they can re-record it repeatedly until they are satisfied.

The Call Stacker's Page Output channel interfaces to the paging system's control unit. Once an announcement is recorded, the Call Stacker plays the announcement over the Page Output channel to the paging system. While the recorded announcement is playing, the Page Output channel provides a contact closure to the paging system.

Once the complete recorded announcement plays to the paging system, it is erased from the Call Stacker, freeing up the recording time for new announcements.

The Call Stacker can be configured to record and play back paging zone selection signals. Between 2 and 4 DTMF digits can be entered prior to recording an announcement which, upon output, precede the recorded announcement and select the paging system's paging zone.

The Call Stacker is equipped with battery backup which allows it to operate for up to two hours, from a fully charged battery, if a power failure occurs.

1-2Overview

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Lucent Technologies LULCST manual Introduction, Call Stacker Unit
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LULCST specifications

Lucent Technologies, once a vital player in the telecommunications and networking landscape, has seen its impact resonate even after its merger with Alcatel in 2006, forming Alcatel-Lucent. Renowned for its innovative technologies and services, Lucent Technologies was instrumental in developing the infrastructure for modern telecommunications networks.

One of the primary features of Lucent Technologies was its commitment to research and development. Renowned for its Bell Labs, the company developed groundbreaking technologies across various fields, including fiber optics, semiconductors, and wireless communications. Bell Labs produced numerous breakthroughs, including the invention of the transistor and advancements in laser technology, which positioned Lucent as a pioneering force in telecommunications.

Lucent Technologies excelled in its range of products designed for both wired and wireless communications. Their telecommunications equipment encompassed switches, routers, and network management systems that formed the backbone of communication networks worldwide. These innovations facilitated the evolution of telephone networks into highly advanced digital communication systems.

In the wireless sector, Lucent was a key contributor to the deployment of GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) technologies. These early mobile communication standards laid the foundation for the development of 3G and later 4G technologies, allowing for increased data transmission speeds and more reliable connections. Lucent's technologies made mobile communication more accessible and efficient, shaping the modern mobile experience.

Another significant characteristic of Lucent Technologies was its focus on customer-centric solutions. The company emphasized the importance of providing tailored services to meet the unique needs of telecommunications providers and enterprise customers. This approach resulted in strong relationships with major carriers and service providers, enabling them to leverage cutting-edge technologies to enhance their service offerings.

In terms of characteristic attributes, Lucent was known for its adaptability and forward-thinking strategy. As the telecommunications landscape rapidly evolved, Lucent continuously focused on emerging trends, including VoIP (Voice over Internet Protocol) and IP networking, which reshaped
the telecommunications ecosystem.

Despite the challenges faced in the competitive market, the legacy of Lucent Technologies lives on through its contributions to both technology and infrastructure that continue to support global communications, ensuring connectivity and advancing the future of telecommunications.
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