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Synergy 4100 – Issue 3 – Edition 1 – 21.08.06 – 7771
If you experience any problems, please call the Helpline on 0870 605 8047 or email bt.helpdesk@suncorptech.com
If the Common Box sub-address 
is currently being used to
send/receive messages, 9 
will be displayed.
4. A list of all stored sub-addresses is displayed, select the
OK option.
5. Press 
and hold to exit and return to standby.
Check the common box sub address 
To check the sub-address number for the Common Box: 
1. Press or , 
TXT Menu
is displayed. Select OK.
2. Press  or  until 
TXT Settings
is displayed. 
Select 
OK.
3. Press or until 
Common Box Sub Address
is
displayed. Select the 
OK option. 
4. The current code for the Common Box is displayed.
Enter a new code for the box and select 
OK.
5. Press 
and hold to exit and return to standby.