Siemens 2011 - Manual (Page 101)

Important notes on putting into service and operation
90
kap18.fm5 18.7.99 Gigaset 2011 Comfort, GBR: A30852-X1106-B307-1-
Connecting the telephone socket
Only use a Siemens telephone cord. Non-Siemens cords
may have a different pin assignment.
The telephone cord jack is connected on the underside of
the base station as follows:
3
2
1 4
5
6
1
2
3
4
5
6
free
free
a
b
free
free