Telephony
176
Loop Detection
Loops can generally occur during a call forwarding chain, e. g. when the call for-
warding destination refers back to the call forwarding 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 for-
warding 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.
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
NEG.
and call signalling is continued.
Note
The call forwarding history cannot be transmitted via Q.SIG connections. Chain de-
tection is also deactivated when forwarding via the voice portal programme OpenAt-
tendant.
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 for-
warding 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
authori-
sation can configure additional call forwarding for a virtual call number also.
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Содержание OpenCom 100 series
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