AASTRA 4147 Medium for MX-ONE (TSE) User Guide EN - Manual (Page 66)

Settings
Dialog 4106 Basic/Dialog 4147 Medium 66
Flash time
Note: This feature is only supported for the Dialog 4147
phone.
Some systems require a different flash time for the R-key. You can
set two different flash times (timed breaks). To find out if you have
to change the flash time, proceed as follows: u
Lift the handset.
z
Make a call using any of the services that require R.
If you cannot use the service, you need to change the flash time.
Change flash time: u
Lift the handset.
Wait for the dial tone. î
Program Press. 2
Press. 0
or
1
Press.
0=100 ms and 1=600 ms. Default setting is digit 0. î
Program Press. d
Replace the handset to finish the procedure.