Call routing
198
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
Dialling the emergency number
Depending on the switch group and switch position, the emergency number dials one
of the three stored phone numbers. The phone numbers must have an exchange ac-
cess prefix.
The external digit barring is bypassed.
The call is routed via the user’s route, provided the stored phone number does not al-
ready have a prefix for exchange access with route selection.
The call charges are logged in accordance with the user configuration, provided the
stored number does not already have an exchange access prefix that regulates call
charge logging (e.g. Exchange access, private).
Dialling from SIP terminal
For SIP terminals, the international number format beginning with the "+" sign is sup-
ported (canonical number). The communication server changes the "+" to a "0" (Ex-
change access business). The external call number may also contain the following
characters: "+", "/", "(", ")" and "space". These signs are filtered out by the communica-
tion server before dialling. If a call number contains the country code as well as the na-
tional prefix, the national prefix can also be automatically filtered out (see "Dialling in-
ternal destinations via external call numbers", page 164).
Dialling an external number assigned to an internal destination
If an external call number is assigned to an internal destination, the outgoing call will be
routed to the internal destination under certain conditions (see "Dialling internal desti-
nations via external call numbers", page 164).
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