User Guide
Table Of Contents
- IS8121-X_QSG_V2_20210204
- IS8121-X_IS8122-X_SCB_V1.1_20210616_BW
- IS8121-X_WEBCIB_v1_210525-compressed
- Install | Set up 
- Operate
- Make, answer or end a home call
- Make, answer or end a cell call
- Call waiting on the home line
- Call waiting on the cell line
- Predial via home call and cell call
- Answer an incoming cell call while on a home call
- Answer an incoming home call while on a cell call
- View dialing options
- Option while on a call
- Join a call
- Intercom
- Sound
- Temporary tone dialing
- Find handset
- Use the phone menu
- Phonebook | Phonebook entry
- Redial list
- Chain dialing
- Caller ID
- About caller ID
- Save a caller ID log entry to the phonebook
- Save a caller ID log entry to block list
- Save a caller ID log entry to allow list
- Save a caller ID log entry to Star name list
- Review the caller ID log
- Dial a caller ID log entry
- Delete caller ID log entries
- Caller ID memory match
- Missed call indicator
- Introducing Bluetooth©
- Bluetooth setup
- Remote voice control
- About Smart call blocker*
- Set profile
- Block list
- Allow list
- Star name list
- Screening announcements
- Voice guide to set Smart call blocker
- Call handlings with Smart call blocker
- Answering system
- Difference between the built-in answering system and voicemail service
- Use your built-in answering system
- New message indication
- Turn on or off the answering system
- Playback messages
- Delete all messages
- Answering system remote access
- Call intercept while using answering system
- Recording memo
- Turn on or off the call screening
- Screen a call with answering system
- Annoucement
- Retrieve voicemail
- Configure | Settings
- General product care
- Technical specifications
- Frequently asked questions
38
39
NOTES
• If you want to cancel an intercom
call and reconnect to the outside
call before the destination handset
answers, press OFF/CANCEL on the
originating handset.
• If the called device does not answer
the intercom call within 100 seconds,
or if the device is in use, on a call or
out of range, the calling handset
shows Unable to call and returns to
the outside call.
• You can press OFF/CANCEL or
MUTE/DELETE on the destination
handset to temporarily silence the
intercom ringer.
• Only one intercom call can be
established at a time.
Sound
Use speakerphone
During a call, press
to switch between
the speakerphone and normal handset
use.
Press OFF/CANCEL, or return the handset
to the telephone base or charger to hang
up.
Control volume
While on a call or message playback, you
can adjust the listening volume on the
handset or telephone base.
If it is a cell call and the volume is too loud,
too quiet or drops out, try changing the
volume on your cell phone. On some
cell phones, changing the volume on the
cell phone affects your cell call volume
on the handsets.
To adjust the listening volume of a
handset:
• Press VOLUME p or VOLUME q on
the handset while on a call.
To adjust the listening volume of the
telephone base:
• Press VOL + or VOL - while listening
to the message playback on the
telephone base.
Temporary ringer silencing
When the telephone is ringing, you
can temporarily silence the ringer of
the handset or telephone base without
disconnecting the call. The next call
rings normally at the preset volume.
• Press OFF/CANCEL or MUTE/DELETE
on the handset. The handset screen
shows Ringer muted and
.
Mute the microphone
The mute function allows you to hear the
other party but the other party cannot
hear you.
To mute a call:
• While on a call, press MUTE/DELETE
on the handset. The screen displays
Muted until the mute function is
turned off.
To end mute a call:
• Press MUTE/DELETE on the handset
again and resume speaking. The
screen briefly displays Microphone
on.
Mute is automatically canceled when
you end the call.
Temporary tone dialing
If you have pulse (rotary) service only,
you can switch from pulse to touch-
tone dialing temporarily during a call.
This is useful if you need to send touch-
tone signals to access your telephone
banking or long distance services.
During a call:
1. Press TONE on the handset.
2. Use the dialing keys to enter the
relevant number. The telephone
sends touch-tone signals.
3. The telephone automatically returns
to pulse dialing after you end the
call.