Testing Overflow Routing In The Pisn - Aastra 400 Series System Manual

Parameter
• Direct dialling plan
• Call Distribution Element
User configuration PISN-BN 330:
• Route
• Number
Route 2:
• Trunk group 2
• Digit barring
• Outgoing connections
• Numbering plan identifier NPI
• Type of number TON
Trunk group 2:
• Network interfaces
• Network type
• Protocol
6. 9

Testing overflow routing in the PISN

When a connection is setup the system checks the availability of the selected path.
If it is not available due to overloading or due to a defect, an attempt will be made
to set up the connection via an alternative route, depending on the configuration.
There are two types of overflow routing:
• Overflow routing within the private leased-line network:
Both the initial and the alternative connection path run via dedicated lines of
the private leased-line network.
• Overflow routing via the public network:
The initial connection path runs via dedicated lines of the private leased-line
network while the alternative connection path runs via the public network.
Transmission of the CLIP number depends on the CLIP settings. See also the over-
flow situations illustrated in the example
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
Parameter value
1 (relevant only if a suitable DD number is found)
Not relevant to this case
2 (route reference number)
Phone number to be dialled without exchange access prefix
2 (reference number of one or more trunk group(s))
Use or do not use digit barring
Number of connections allowed simultaneously
PNP
Unknown
Network interfaces of this trunk group
Private
QSIG or QSIG / PSS1 ISO
onpage 98.
Call routing
265