Version 6.6
237
MP-11x & MP-124
User's Manual
22. Routing
3.
Define SIP response codes (call failure reasons) that invoke alternative Tel-to-IP
routing:
a.
Open the Reasons for Alternative Routing page (
Configuration
tab >
VoIP
menu
>
GW and IP to IP
submenu >
Routing
submenu >
Alternative Routing
Reasons
).
Figure
22-4: Tel to IP Reasons - Reasons for Alternative Routing Page
b.
Under the 'Tel to IP Reasons' group, select up to five different SIP response
codes (call failure reasons) that invoke alternative Tel-to-IP routing.
c.
Click
Submit
.
22.6 Alternative Routing for IP-to-Tel Calls
The device supports alternative IP-to-Tel call routing, as described in this section.
22.6.1 Alternative Routing to Trunk upon Q.931 Call Release Cause
Code
You can configure the device to do alternative IP-to-Tel call routing based on the received
ISDN Q.931 cause code. If an IP-to-Tel call is rejected or disconnected on the Tel side as a
result of a specific ISDN Q.931 release cause code that is listed in the Reasons for
Alternative Routing table, the device searches for an alternative IP-to-Tel routing rule in the
Inbound IP Routing table and sends it to the alternative Hunt Group. For example, you can
enable alternative IP-to-Tel routing for scenarios where the initial Tel destination is busy
and a Q.931 Cause Code No. 17 is received (or for other call releases that issue the
default Cause Code No. 3).
You can also configure a default release cause code that the device issues itself upon the
following scenarios:
The device initiates a call release whose cause is unknown.
No free channels (i.e., busy) in the Hunt Group.
No appropriate routing rule located in the Inbound IP Routing table to the Hunt Group.
Phone number is not found in the Inbound IP Routing table.
By default, it is set to Cause Code No. 3 (No Route to Destination). This default cause
code can be changed using the 'Default Release Cause' parameter located in the
Advanced Parameters page (
Configuration
tab >
VoIP
menu >
SIP Definitions
>
Advanced Parameters
). To enable alternative routing based on Q.931 cause code, you
need to define this cause code in the Reasons for Alternative Routing table.
Содержание MediaPack MP-112
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