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General| Brand | AT&T |
|---|---|
| Model | 874 |
| Caller ID | Yes |
| Call Waiting | Yes |
| Redial | Yes |
| Volume Control | Yes |
| Power Source | AC Adapter |
| Speakerphone | Yes |
| Display | LCD |
| Memory | 50-number memory |
Steps for installing the telephone on a desk or table, including battery and cord connections.
Instructions for mounting the telephone unit onto a wall, including battery and base preparation.
Procedure for assigning a unique intercom extension number (11-22) to each telephone unit.
Detailed steps for initiating calls using the handset or speakerphone, and answering incoming calls.
Instructions for redialing the last number dialed using the REDIAL button.
How to activate and cancel the automatic redial function when a line is busy.
Steps for placing a call on hold, releasing it, and managing hold reminders.
Procedures for transferring calls, both announced and unannounced, to other phones.
Steps for saving phone numbers into the phone's memory locations.
Explanation of basic intercom functions like INTERCOM, PAGE, ALLPAGE, CONF, TRNSFR.
Steps to initiate an intercom call or page to another station or all stations.
How to receive and answer an intercom call or page.
Procedure for disconnecting an intercom call or page.
Instructions for broadcasting a message to all phones in the system simultaneously.
Common causes and solutions for not hearing a dial tone when lifting the handset.
Troubleshooting steps for issues with dialing numbers, including tone/pulse mode.
Steps to resolve issues where the telephone is not ringing, checking DND and ringer settings.
How the attendant phone handles incoming calls and manages Centrex lines.
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