Bosch Integral TS13 Operating Instructions Manual page 7

Programmable function keys (standard assignment)
Symbol for the upper key
Symbol flashes slowly:
Symbol flashes quickly:
Symbol illuminates:
Symbol off:
Which keys for which functions? "
The two upper rows of keys on your
telephone can be assigned any func-
tions. The "Transfer" and "Interchange"
keys are programmed as a default.
The symbols above these keys indicate
the status of your respective partners.
The keys in the second row are pre-set
to the following functions in the standard
first call
setting:
second call
"Text shift key", "Speed dial", "Retrieve",
busy
"Transfer" and "Interchange".
free
Familiarize yourself with your phone
7