TELEPHONE

TELEPHONE OPERATION

LINE STATUS INDICATORS

The status of each line is indicated with a LED in the LINE SELECT keys.

Mode

This Extension

Other Extension

Idle

Off

Off

In Use

Solid Green

Solid Red

On Hold

Slow Green

Slow Red

Ringing

Fast Green

Fast Green

POT in Use

Slow Red

Slow Red

Transfer

Slow Green

Fast Green

VOLUME CONTROL

Volume levels for each of the three off-hook modes and the telephone ringer can be independently set. Once set, the volume for each mode will be saved until a new setting is entered.

Corded Handset: 4 levels

Speaker: 8 levels

Headset: 4 levels

Ringer: 4 levels

OFF-HOOK VOLUME

1 . To change the volume level for each mode, press VOLUME + or VOLUME – when in that mode.

2 . A tone will sound when the highest or lowest setting is reached.

NOTE:

There is no tone when the highest speaker volume level is reached.

RINGER VOLUME

1. From the idle mode, press VOLUME + or VOLUME – until the desired ringer level is heard.

TELEPHONE OPERATION

MAKING TELEPHONE CALLS

Incoming and outgoing calls can be made using the handset, headset or speakerphone modes. Switch between off-hook modes as follows:

Handset to headset – press HEADSET.

Handset to speakerphone – press SPEAKER.

Headset to handset – lift the handset.

Headset to speakerphone – press SPEAKER.

Speakerphone to handset – lift the handset.

Speakerphone to headset – press HEADSET.

PRIME LINE

When a line is set as the PRIME LINE, the 420 will attempt to seize this line when the phone is taken off-hook. If the PRIME LINE is not available when the phone goes off hook, the next available line will be selected. If all lines are in use, an error tone will be heard and no line will be seized.

The PRIME LINE selection can be overridden simply by pressing the LINE SELECT button. If the line selected is free, the speakerphone will be automatically activated. If the line is in use, the line will not be seized.

RECEIVING TELEPHONE CALLS

A call can be manually answered by pressing the LINE SELECT button for the ringing line. The speakerphone will turn ON and the call will be answered.

If the phone is ringing and is taken off-hook, the ringing line will be answered. If more than one line is ringing, the line that was ringing first will be answered.

If the phone is ringing and you do NOT wish to answer the call but wish to make an outgoing call, press the LINE SELECT button of a non-ringing line.

RECEIVING CALL WAITING CALLS

If you subscribe to Call Waiting and a call is received on a line in use for another call, you will hear a beep to indicate the presence of a Call Waiting call. If you subscribe to Call Waiting Caller ID, the Caller ID information will appear on the display.

To answer the call waiting call, either press FLASH or enter the CENTREX call waiting command (for example 99) on the desk station. To simplify CENTREX operation, you can program the command into one of the feature keys. Refer to your CENTREX manual for the correct command sequence.

TELEPHONE

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AT&T SBC-420 Line Status Indicators, Volume Control, Making Telephone Calls, Prime Line, Receiving Telephone Calls

SBC-420 specifications

The AT&T SBC-420 is a high-performance broadband and voice communication device designed to meet the demands of both residential and business users. As a part of AT&T's ongoing commitment to providing reliable connectivity solutions, the SBC-420 integrates advanced technologies to enhance user experience and deliver robust service capabilities.

One of the main features of the SBC-420 is its dual-mode functionality, allowing it to operate as both a digital subscriber line (DSL) modem and a Voice over Internet Protocol (VoIP) gateway. This versatility makes it an ideal choice for users who require both high-speed internet access and digital voice services. With its support for multiple simultaneous calls over the same broadband connection, the SBC-420 ensures that users can enjoy clear and uninterrupted voice communication.

The SBC-420 is equipped with advanced DSL technology, supporting ADSL2+ for faster download speeds and improved performance. This technology enables users to experience seamless streaming, gaming, and browsing capabilities, even during peak usage times. The device brings high-speed internet access right into the home or office, reducing latency and enhancing the overall internet experience.

In terms of wireless connectivity, the SBC-420 features built-in Wi-Fi capabilities, offering users the flexibility to connect multiple devices without the need for additional routers or access points. With dual-band support, this device can reduce interference and provide stable connections across various environments. The inclusion of multiple Ethernet ports also ensures that wired connections can be established for devices that require a more dependable connection.

Security is a key focus for the SBC-420, which includes robust encryption protocols to protect user data and maintain privacy across the network. The device simplifies network management and security settings, allowing users to easily monitor and configure their home or office network to their specific needs.

Overall, the AT&T SBC-420 combines essential features, cutting-edge technologies, and user-friendly characteristics into a single device that excels in delivering fast internet and reliable voice services. Its adaptability, advanced performance, and commitment to security make it an excellent choice for a wide range of users, from casual consumers to small businesses seeking dependable communication solutions.