Mitel Aastra 470 System Manual page 246

Operation and Maintenance
Signalling an event message to an external signal destination
Wait for 30 s
Fig. 91 Flowchart of the signalling of an event message to an external signal destination
The following principles govern the way event messages are signalled to an exter-
nal signal destination:
• Individual event messages are not signalled if they occur at short intervals. The
event messages are stored temporarily for 5 minutes and then sent together to
the external signal destination.
• If over a period of one hour an attempt is made unsuccessfully to send the event
messages to the external signal destination, the signalling period is extended
246
Event message
Signalling delayed
up to 5/240 min.
Call external
event message
destination
State
external event
Busy
message
destination
Cannot be reached / blocked
J Dialling
N
Delay 40 sec.
attempts
< 5 / 2
Alternative
event message
destination?
Wait for 30 s
Busy external event
message
destination
Dialling
J N
attempts
< 5 / 2
Dialling
J
attempts
External event
message destina-
tion not available
Connection established
?
external
State
Connection established
?
Cannot be
reached / blocked
< 2
N
Output event
message
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014