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Loop Detection
Loops can generally occur during a call forwarding chain, e. g.
when the call forwarding destination refers back to the call for-
warding source. This is why a forwarded call has a call forwarding
history. When the next call forwarding destination is already
included in the call forwarding history, a loop is detected and any
further call forwarding is prevented. If no parallel call signalling
takes place, e. g. by the Indicate call forwarding after time
parallel setting in the user group, the call is cleared when there is
a loop.
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Loop Detection
A loop is also detected during call diversion. When you wish to
divert an incoming call to a destination call number which is
already part of the call forwarding chain, the display shows
and call signalling is continued.
Note: The call forwarding history cannot be transmitted via
Q.SIG connections. Chain detection is also deactivated when for-
warding via the voice portal programme Forum Auto Attendant.
Virtual Call Numbers
A virtual call number is not assigned to any terminal. You always
also enter an internal or an external destination call number
directly when configuring a virtual call number. When the virtual
call number is called this destination call number is signalled. This
behaviour is handled as an immediate call forwarding and is thus
the first call forwarding in a possible call forwarding chain.
You can include a virtual call number e. g. in call distribution.
Using the possibility of multiple call forwarding, you can also use a
virtual call number as an exchange ("Operator"). Furthermore, a
user with the Call forwarding for other user authorisation can
configure additional call forwarding for a virtual call number also.
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Call Forwarding
NEG.
Telephony
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