"Star" or asterisk key
"Pound" or number key
Display Panel
The display panel is a small screen at the top of the desk set (with a knob to adjust its contrast). It displays the date and time when the
phone is not in use, or displays information about calls when in use. For details, see Section 9, "
The Display Panel
."
Message Light
If you subscribe to voice mail, the Message light indicates that new messages are in your voice mailbox.
Data/Send/Off Button
The Data/Send/Off button carries data communications between a microcomputer or workstation connected to the digital set and a
remote computer. Data calls do not interfere with placing or receiving voice calls -- they can occur simultaneously.
Speakerphone
The Speakerphone lets you place and answer calls without lifting the receiver. The microphone and speaker are located in the desk
set, under the receiver. When using the Speakerphone, speak toward the front of the desk set.
1. To activate the Speakerphone, press
2. To disconnect, press
then press
Adjusting Volume of Ringer and Receiver
The Volume button controls the loudness of your phone's ring, and the voice level of the receiver and Speakerphone. You can change
the loudness of the phone's ring whenever you are not on a call. You can change the voice level of the receiver or speaker only when
you are on a call.
1. Press the
arrows until you hear the desired volume.
Left arrow lowers the volume; right arrow raises the volume.
Result:
Each press adjusts the volume.
Digital Phone Options
The 5ESS and the digital telephone provide optional features and services that you can order as new service or changes to existing
service. Two call-handling options,
ringing line preference
and
reserved call appearances
, are described below. Other options --
intercom calling
,
call pickup groups
, and
speed dialing
-- are explained in their own sections elsewhere in this guide. For more
information on these options, and other options not covered in this guide, contact your Customer Service Representative.
Ringing Line Preference
With ringing line preference you do not have to press a CA to answer or place a call -- the appropriate CA will be selected
automatically when you lift the receiver or press Speaker. If you are on a call and another comes in, put the first call on hold and press
Drop to connect to the second call. Ringing line preference is not recommended for digital desk sets carrying more than one phone
number.
5ESS Digital (ISDN) Telephone User Guide | IS&T
https://ist.mit.edu/services/telephony/isdnguide
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