Quick start guide
SynJ SB67148  
DECT 6.0 4-line 
expansion deskset  
for use with AT&T model  
SynJ SB67118/SB67138
Message playback
You can play the messages from your deskset 
mailbox and the general mailbox. If you have 
new messages, the system plays them (in 
chronological order) automatically when you 
access the mailbox.
Listen to new messages in the deskset mailboxsten to new messages in the deskset mailbox
When the deskset is not in use, press  
/MAILBOX.
Listen to new messages in the general mailbox
When the deskset is not in use, press  
/MAILBOX.
Press  DIR or CID  to scroll to  
General mailbox. Press the Select softkey.
Press the Select softkey again to choose  
Play all.
Options during message playback
When a message is playing, you can adjust  
the playback volume, skip, repeat, or delete  
the message.
Press VOL+ or VOL- to adjust the message 
playback volume.
Press   or   /SKIP to skip to the next message.
Press   or  /REPEAT to repeat the message. 
Press twice to hear the previous message.
Press X/DELETE to delete the message. The 
system announces, “Message deleted.”
Press the Back softkey to stop the playback 
and return to the mailbox.
Press EXIT to stop the playback and exit.
NOTE: Refer to the user’s manual for complete 
installation and operation instructions.
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Join a call in progress
Press and hold the desired LINE 1-LINE 4 key to 
join the call.
Three-way conference calls
You can set up a three-party call by using two 
lines at the same time. You can also join an 
intercom call with a call on an outside line. The 
outside call must be established first because an 
intercom call cannot be placed on hold.
Make a three-way conference call
Make or answer an outside call.
Press HOLD and call someone on another line, 
or start an intercom connection.
-OR-
Call someone on another line, or intercom 
someone. The first line is automatically put  
on hold.
Press the Conf softkey at any time to begin 
the three-way conference.
Intercom calls
You can use the intercom feature to initiate 
conversations with any system device not in use.
Press the INT key on the deskset.
Press  DIR or  CID to choose a destination 
device.
-OR-
Press   (star key) for the main base, 1-0 
for extension 1-0, or # (pound key) for all 
extensions.
Press the Select softkey.
The screen displays Calling X:Handset X 
(X represents the extension number [1-0], 
Handset X represents the handset name), 
Calling 
*
:Base or Calling All.
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Push to talk (PTT) intercom
When the deskset is not in use, press and hold 
PTT on the side of your handset to broadcast your 
voice to the main telephone base and all other 
extensions. When the connection is made, both 
the caller and the destination parties hear two 
beeps. Only one extension may speak at a time.
Record a call
While on a call, press the Option softkey. 
Press  DIR or CID  to scroll to           
Record call on. Press the Select softkey.
The recording starts and the system 
activates the call privacy automatically. The 
screen displays -PRIV and -REC and the 
timer starts counting.
To stop recording and continue the call, press 
the Option softkey and then press the Select 
softkey to choose Record call off. The system 
saves the conversation into the deskset 
mailbox.
-OR-
The recording ends when you disconnect  
the call.
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© 2010-2011 Advanced American Telephones. All Rights Reserved. 
AT&T and the AT&T logo are trademarks of AT&T Intellectual Property
licensed to Advanced American Telephones, San Antonio, TX 78219. 
SynJ
TM
 is a trademark of Advanced American Telephones. 
Printed in China. Issue 3 AT&T 01/11.
For document downloads, FAQs and more, visit 
our website at www.telephones.att.com 
or call 1 (888) 915-2007. In Canada, dial  
1 (866) 288-4268.  
Deskset basic operation Deskset basic operationDeskset basic operation
Make, answer or end a call
Make a call
Lift the corded handset.
-OR-
Press   SPEAKER, HEADSET or a desired line 
key (LINE 1-LINE 4). 
Wait for a dial tone, then enter the telephone 
number. The screen displays the elapsed time 
as you talk.
Answer a call 
Lift the corded handset; or press   SPEAKER or 
HEADSET. 
End a call
Place the corded handset back in the deskset.
-OR-
Press   SPEAKER while you are using the 
speakerphone.
-OR-
Press HEADSET while you are using the corded 
headset.
Place a call on hold:
While on a call, press HOLD. The  
LINE 1-LINE 4 indicator for the line on hold 
flashes slowly in red. After the call has been on 
hold for more than three minutes, a beep sounds 
every 30 seconds. 
If you are using the speakerphone, the 
speakerphone turns off automatically when you 
press HOLD.
To resume the call, press LINE 1-LINE 4 of the 
call on hold.
Switch among lines 
Press LINE 1-LINE 4 of another telephone line to 
make or answer another call. The current call is 
put on hold automatically.
To return to the first call, press the original 
LINE 1-LINE 4. The second line is put on hold 
automatically.
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