If you need some help, call us on 0800 145 6789* or go to bt.com/producthelp 
Settings 62
If you wish to revert to not 
using a PBX access code, you 
need to go into the PBX code 
menu and delete all the digits 
by selecting Clear, then select 
Save.
PBX access code
If you’re connected to a switchboard, you might 
need to enter an access code (e.g.9) before each 
number is dialled. Your BT6600 can store an access 
code which is automatically dialled before each 
number. 
Set a PBX access code
1. Select Menu, scroll 
 to display Settings and 
press Select.
2. Press 
 to highlight Base settings and press 
Select.
3. Press 
 to display PBX Code and press Select. 
4. Enter the number you want (maximum of 4 digits) 
and select Save.
Change the system PIN
1. Select Menu, scroll 
 to display Settings and 
press Select.
2. Press 
 to highlight Change Sys. PIN and 
press Select.
3. If the current PIN is 0000, you will be prompted 
to enter the new 4 digit PIN, then press OK. (Or, if 
the current PIN is not 0000, you will be prompted 
The default system PIN is 0000. 
You can change this to your 
own preferred 4-digit code.
The system PIN is different  
to the call control PIN.  
See page 33.
The system PIN is used when 
changing certain settings and 
for registration/de-registration.
If you make a mistake, select 
Clear to delete a digit.