Mitel 430 - Page 227

Call routing
227
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
End-to-End ISDN Connection
The release signal is sent as soon as the call is completed.
Non-End-to-End ISDN Connection
With non-end-to-end ISDN connections the amount of time between the completion of
the call and the release depends on who set up the connection:
• If the connection was set up by the internal user (i.e. from the communication
server’s viewpoint an outgoing call), and the external partner (user C in Fig. 108
)
hangs up, it can take a few minutes for the release signal to be sent.
• If the connection was set up by one of the external partners (i.e. from the communi-
cation server’s viewpoint an incoming call) and the external partner (user B in
Fig. 108
) hangs up, the release signal is sent immediately.
Note:
If two announcement services such as sports and weather information are connected with each
other, this exchange-to-exchange connection will not be cleared down automatically This can
lead to high call charges.
Each exchange-to-exchange connection will be cleared down by the communication
server after two hours.
Note:
If an exchange-to-exchange connection is transferred to the exchange using Partial Rerouting
or Call Deflection, the communication server no longer has any control over the connection and
therefore cannot disconnect it.
Analogue-to-analogue or digital-to-digital
Release on the analogue interface cannot be guaranteed with these connection types.
On analogue network interfaces the communication server detects loop interruptions,
polarity reversal, congestion tone and busy tone as release criterion. The detection can
be configured per analogue network interface ( =7g) with the parameter Release
signal type and depends on network provider.
The frequency and time sequence of the busy tone vary from country to country. De-
tection is automatically adapted to the set country.
The sound level of the busy tone may vary greatly within a country and depending on
the line length. With the setting the Busy tone level detection can be adapted to the
existing level.