Handset

Volume control button

Transfer button

Feature button

Conference button Test button Drop button

Mute button

Speaker button

a

b

c

 

 

c

Volume

 

 

 

 

 

1

 

ABC

 

DEF

Feature

 

Transfer

 

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GHI

 

JKL

 

MNO

Test

 

Conf

 

4

 

5

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drop

 

 

PQRS

 

TUV

 

WXYZ

Mute

 

 

7

 

8

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Speaker

 

Hold

 

*

 

O

 

#

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dial pad

Hold/Ring button

Handset jack

Feature Directory

3 Call appearance buttons Message light

Line jack (on back of LINE voice terminal)

Speakerphone/ headset adapter jack (on back of voice terminal)

Figure 2. Another Version of the 8403 Voice Terminal

The following features on the 8403 voice terminal shown in Figures 1 and 2 are listed alphabetically for your convenience. Explanations for each feature are also provided.

Conference button

For setting up conference calls. This button is labeled

Conf

.

Dial pad

The standard 12-button pad for dialing phone numbers and accessing

 

features. (See Note below.) The letters “Q” and “Z” have been added

 

to the appropriate dial pad keys for directory access, and the “5”

 

button on your dial pad has raised bars for visually-impaired users.

 

Note: The dial pad can be used in 2 ways:

 

• Feature selection mode — When you press

 

(and the

 

Feature

 

Feature light is on), the dial pad is used to access the features

 

listed on F1 through F9, F*, F0, and F#.

 

• Normal mode — When the Feature light is off, the dial pad can

 

be used in the usual manner, that is, to dial phone numbers or

 

feature access codes.

Drop button

For disconnecting from a call or dropping the last party added to a

 

conference call.

Feature button

A blue button used with dial pad keys for accessing the 12 features listed on the Feature Directory. (This button will be shown as

Feature in the remainder of this guide.) When the Feature button is active, the red light next to the button is on. When this button is used

with Hold , you can select a personalized ring from among eight available patterns.

2

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Page 5
Image 5
Lucent Technologies manual Another Version of the 8403 Voice Terminal, Feature selection mode When you press
Page 4 Page 6

8403 specifications

Lucent Technologies 8403 is a significant telecommunications switch that was primarily utilized in the late 1990s and early 2000s. It played a crucial role in the evolution of telecommunication systems, reflecting the rapid advancements in technology during that period. The 8403, part of the Lucent 8400 series, was known for integrating various features and capabilities that were vital for modern telecommunication networks.

One of the standout features of the Lucent 8403 was its advanced switching technology. Utilizing time division switching and digital signal processing, the device was capable of handling a large volume of calls simultaneously while maintaining high-quality voice transmission. This technology enabled efficient routing of calls and minimized the risk of dropped connections, which was a concern in earlier analog systems.

Another significant characteristic of the Lucent 8403 was its support for a wide range of telecommunications protocols. The switch was designed to facilitate both traditional telephone services and emerging digital services, including ISDN and Frame Relay. By accommodating both circuit-switched and packet-switched networks, the 8403 provided flexibility that major telecommunication providers demanded during that transition period.

The 8403 also featured enhanced signaling options, such as Common Channel Signaling System No. 7 (CCSS7), which allowed for improved call setup, control, and management. This feature significantly reduced the time it took to establish a call, thereby improving overall network efficiency.

Scalability was another key characteristic of the Lucent 8403. As telecommunication needs grew, service providers could expand their systems by integrating additional hardware and modules without requiring a complete overhaul of the existing infrastructure. This adaptability was crucial as demand for services fluctuated and as new technologies emerged.

Moreover, the switch was designed with reliability and redundancy features in mind. Its architecture included failover mechanisms that ensured continued operation even in the event of hardware failures. This reliability was essential for operators that required uninterrupted service delivery.

Lastly, the user-friendly interface of the Lucent 8403 provided simplified management and monitoring capabilities. System administrators could easily access performance metrics, troubleshoot issues, and manage configurations, facilitating more efficient maintenance and operations.

In conclusion, the Lucent Technologies 8403 played a transformative role in telecommunications infrastructure during its era. Its blend of advanced switching technology, protocol support, scalability, reliability, and user-friendly management tools made it a foundational component in the evolution of modern telecom networks. As a result, it served as a significant stepping stone toward the complex, integrated systems we see today.
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