8.11.1.2.2. Generation 
CHANGE-ZAND:TYPE=KEYSYS,DSAALINC=YES;
Configuration example:
Station A no. 1000 - keyset
Station B no. 1001 - keyset
Station C no 1002 - optiPoint 410, Anate, .....
Station A has on the key no.5 a secondary line of B configured.
When C dials the number of B, this call should by signaled on A, by
the blinking led (no.5) and by displaying "1002 C -> 1001 B ".
(Name and number of the parties, if available)
The display of A must remain active for 10 seconds and return to the
previous display after time-out, if the call is not answered nor dropped
during this time.
If B answers the call before the 10 seconds timer expires, then the
display of A must be refreshed and changed back to the display before.
If C goes on-hook (drops the call) before B answers, then the display
of A must be switched back to the previous display. (the one before the
call to B occurred).