System Functions and Features as of I7.9
158 Call routing
syd-0200/3.0 – I7.9 – 11.2009
Note:
If PSTN overflow is enabled and configured in the AIN, an attempt will
first be made to route the call via the PSTN.
Category 3: Satellite in offline mode or terminal port inactive
• The required user is on a satellite that is currently in offline mode.
• An originally configured terminal port is inactive because an interface card is not
fitted or because of a hardware fault.
Examples of sensible redirection destinations:
User’s external call number (if the satellite also has access to the public network),
user’s GSM call number, general Voice Mailbox, switching centre.
Note:
If the required user is technically obtainable but the call is not answered,
two redirection destinations can be also be configured for internal and
external calls (see "Default diversions per user", page 149).
Other properties of redirection destinations when unobtainable
• If the caller is forwarded to a destination that is also unobtainable, he obtains
the busy tone.
• If the redirection destination is busy, the caller obtains the busy tone.
• If a forwarding to the originally dialled user has been configured at the redirec-
tion destination (thereby creating a loop), the forwarding is not carried out and
the terminal at the first redirection destination rings instead.
• If an external caller is forwarded to an external destination, the settings for ena-
bling exchange-to-exchange traffic need to be observed.
• If the user of IP terminal cannot reach the user he has dialled because there are
no VoIP capacities available on his side, the redirection destinations for unob-
tainable are not applied.
• A call to a user who is redirected to a destination if unobtainable always triggers
an entry in the user’s unanswered call list, even if the call is answered at the redi-
rection destination.
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