
Install the telephone base
Install the telephone base as shown below. If 
you subscribe to high-speed Internet service 
(DSL - digital subscriber line) through your 
telephone lines, you must install a DSL filter on 
each DSL line.
Plug the large end 
of the power adapter 
into a power outlet 
not controlled by a 
wall switch. 
Plug the small 
end of the power 
adapter into the 
power jack at the 
bottom of the 
telephone base. 
Route the power 
adapter cord 
through the slot on 
the bottom of the 
telephone base.
Raise the two antennas 
for optimum wireless 
range and performance. 
For greater range, add 
optional repeaters  
(SynJ SB67128). 
Plug the end of the 
coiled handset cord 
into the HANDSET 
jack on the left side 
of the telephone. 
Optional 
DSL filters
Telephone 
line cords
Line 3
+ 
Line 4
Line 1
+
Line 2
Answering system setup
You can set each of the four lines to 
automatically answer incoming calls in two 
different ways by pressing ANSWER ON.
General mailbox (gen MB only): Incoming 
•
calls ring on every extension. If there is no 
answer, the caller is prompted to leave a 
message in the general mailbox, which a 
person at any handset can review.
Auto attendant (auto att): Extensions do 
•
not ring for incoming calls. The system 
automatically answers and prompts the caller 
to enter an extension number. 
Record announcement: You can record up to 
five two-minute announcements and switch 
among them. The auto attendant announcement 
should contain instructions for the caller.
When the telephone is idle, press 
1.
ANSWER ON for the desired line.
Press  or  to scroll to Setup. Press MENU/ENTER.
2.
Press  or  to scroll to Announcement. 
3.
Press MENU/ENTER.
Press  or  to scroll to one of the 
4.
announcements, Anncemnt 1 through 
Anncemnt 5. If no message has been 
recorded, (none) appears. Press MENU/ENTER.
Press MENU/ENTER to start recording. The timer 
5.
starts counting. Press MENU/ENTER again to stop  
recording. The timer stops and the recorded 
announcement automatically plays back. 
Press 2 to save the announcement and return 
6.
to the previous menu, or press 1 to record the 
announcement again. 
-ORTo exit without making changes, press EXIT.
Record extension list: You can record a list 
of your phone extensions that will play when 
the auto attendant answers a call and the user 
presses the  (star key) twice. twice. 
Sample extension list: “For sales, press 1, then 
pound; for service, press 2, then pound; for 
shipping, press 3, then pound; or press star, then 
pound for the receptionist.”
When the telephone is idle, press 
1.
ANSWER ON for the desired line.
Press  or  to scroll to Setup. Press MENU/ENTER.
2.
Press  or  to scroll to Record ext list. Press 
3.
MENU/ENTER. The current extension list plays.
Press 1 to select Change.
4.
Press MENU/ENTER to start recording. The 
5.
timer starts counting. Press MENU/ENTER again 
to stop recording. The timer stops and the 
recorded message automatically plays back.
Press 2 to save and return to the previous 
6.
menu, or press 1 to record the message again.
-ORTo exit without making changes, press EXIT.
Using the telephone
To make a call: Lift the corded handset or press 
 SPEAKER. To override automatic line 
selection, press LINE 1-LINE 4 for the desired 
line, then lift the corded handset. Wait for a 
dial tone, then enter the telephone number. The 
screen displays the elapsed time as you talk.
To answer a call: Lift the corded handset or 
press  SPEAKER.
To end a call: Place the corded handset 
on the telephone base. If you are using the 
speakerphone, press  SPEAKER to hang up.
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 line call must be established first, 
because an intercom call cannot be placed  
on hold.
To make a three-way conference call:
1. Make or answer an outside call.
2. Call someone or answer a call using another 
line, or intercom someone. The first line is 
automatically put on hold. Press CONF at any 
time to begin the three-party conference.
Intercom calls
Press the one-touch EXT 1-0 key for the 
extension you want to call.
Push to talk (PTT) intercom
When the base is idle, press and hold a  
one-touch EXT 1-0 key to broadcast a message 
to that handset’s speakerphone. 
Press and hold INT/PTT ALL to broadcast your 
voice to all extensions.
Recording a call
While on a call, press MENU/ENTER. Press  or  
to scroll to Record call ON. Press MENU/ENTER.  
The screen displays -PRIV and -REC, and the timer  
starts counting while recording. The recording 
ends when you end the call.
-OR-
To stop recording and continue the call, press 
MENU/ENTER twice to select Record call OFF.
Quick start guide
SynJ SB67158 DECT 6.0  
4-line corded/cordless 
small business system

Quick reference guide
LINE 1-LINE 4 keys
Press to make or answer a call on the desired line.
The indicator is on when a telephone line is in use. It flashes 
slowly when a telephone line is on hold. It flashes rapidly when 
there is an incoming call.
ANSWER ON keys
Press to show the automatic answer options for that line. 
PAUSE/REDIAL
Press repeatedly to view the last 10 numbers dialed. 
While entering digits, press to insert a dialing pause.
CALL LOG
Press to view caller ID information.
DIR
Press to view directory information.
REMOVE
While playing a message, press to delete.
While reviewing the caller ID information, directory entry, or last 
redial number, press to delete an individual entry. 
While predialing, press to delete digits.
Navigation keys
While in menus, press  or  to 
scroll through the menus, highlight 
items or change settings. 
While entering names or numbers, 
press REP or SKIP  to move the 
cursor to the left or right. 
While playing back messages, press 
REP to repeat the message, or press  
REP twice to hear the previous 
message, or press SKIP  to skip to 
the next message. 
NEW CALL indicator
On when there are new or missed calls. 
MENU/ENTER
Press to enter the menu.
While in the menu, press to select an item or save an entry 
or setting. 
EXIT
While in a menu, press to cancel an operation or exit the 
menu display.
CONF
Press to add another extension or outside line to an existing 
call.
HOLD
Press to place an outside call on hold.
 (Messages)
When in idle mode, press to enter the general mailbox 
menu. The indicator flashes when there are new or missed 
messages in the general mailbox.
Main menu
The > symbol highlights a menu item.
Directory
>
Call log 
Ringer setting 
Mailbox setup
Menu
Main menu
Directory
• 
Call log
• 
Ringer setting
• 
Mailbox setup
• 
Base setup
• 
COVM
• 
Speed dial setup
• 
Customer support
• 
Registration
•
Using menus
Press MENU/ENTER to show the first menu 
•
item, Directory. 
Press  or  to scroll through menu items.
•
Press MENU/ENTER to select or save changes 
•
to a highlighted menu item.
Press EXIT to cancel an operation, exit the 
•
menu display, or return to the idle screen. 
Press REP to back up to the previous menu.
•
INT
When in idle mode, press to initiate an intercom call. 
The indicator is on when an intercom call is in progress.
FLASH
During a call, press to answer an incoming call when you 
receive a call waiting alert.
HEADSET 
When a corded headset is connected to the telephone base, 
press to get a line, answer a call or hang up.
The red indicator is on when the headset is in use. 
XFER (transfer)
Press to transfer a call to an extension. 
Press to transfer messages from the general mailbox to a 
handset mailbox. 
DND (do not disturb)
Press twice to turn the feature on; you will not hear paging 
tones, voice paging, or incoming call rings. Press again to turn 
off. The indicator is on when DND is on.
MUTE
During a call, press to mute the microphone. The indicator 
flashes slowly when the microphone is muted.
During an incoming call, press to mute the ringer.
VOL+/VOL-
During a call, press to adjust the listening volume. 
During message playback, press to adjust the playback volume.
 SPEAKER
Press to turn on the speakerphone. Press again to turn it off. 
The indicator is on when the speakerphone is on.
One-touch keys, EXT 1-0
Press to intercom with the desired cordless extension number.
Press and hold to broadcast your voice to that extension.
INT/PTT ALL/PTT ALL
Press to page all extensions. An intercom connection is 
established with the first extension that answers.
Press and hold to broadcast your voice to all extensions. 
For document downloads, FAQs and more, visit us 
online at www.telephones.att.com/smb or  
call 1 (888) 915-2007. In Canada, dial 
1 (866) 288-4268.
© 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. 
SynJTM is a trademark of Advanced American Telephones. 
Printed in China. Issue 2 AT&T 08/11.