Ip Destinations Connectivity Feature - AudioCodes Mediant 800B User Manual

Parameter
Web: Source IP Group ID
CLI: src-ip-group-id
[PstnPrefix_SrcIPGroupID]
24.4

IP Destinations Connectivity Feature

The device can be configured to check the integrity of the connectivity to IP destinations of
Tel-to-IP routing rules in the Outbound IP Routing table. The IP Connectivity feature can be
used for the Alternative Routing feature, whereby the device attempts to re-route calls from
unavailable Tel-to-IP routing destinations to available ones (see ''Alternative Routing Based
on IP Connectivity'' on page 383).
The device supports the following methods for checking the connectivity of IP destinations:

Network Connectivity: The device checks the network connectivity of the IP
destination configured by the 'Alt Routing Tel to IP Connectivity Method' parameter:
•
SIP OPTIONS: The device sends "keep-alive" SIP OPTIONS messages to the IP
destination. If the device receives a SIP 200 OK in response, it considers the
destination as available. If the destination does not respond to the OPTIONS
message, then it is considered unavailable. You can configure the time interval
for sending these OPTIONS messages, using the 'Alt Routing Tel to IP Keep
Alive Time' parameter.
These parameters are configured in the Routing General Parameters page
(Configuration tab > VoIP menu > GW and IP to IP > Routing > General
Parameters), as shown below:
Figure 24-4: IP Connectivity Method in Routing General Parameters Page

Quality of Service (QoS): You can enable the device to check the QoS of IP
destinations. The device measures the QoS according to RTCP statistics of previously
established calls with the IP destination. The RTCP includes packet delay (in
milliseconds) and packet loss (in percentage). If these measured statistics exceed a
user-defined threshold, the destination is considered unavailable. Note that if call
statistics is not received within two minutes, the QoS data is reset. These thresholds
are configured using the following parameters:
•
'Max Allowed Packet Loss for Alt Routing' (IPConnQoSMaxAllowedPL): defines
the threshold value for packet loss after which the IP destination is considered
unavailable.
•
'Max Allowed Delay for Alt Routing' (IPConnQoSMaxAllowedDelay): defines the
threshold value for packet delay after which the IP destination is considered
unavailable
User's Manual
For IP-to-Tel calls: Defines the IP Group associated with the
incoming IP call. This is the IP Group that sent the INVITE
message. This IP Group can later be used as the 'Serving IP
Group' in the Account table for obtaining authentication user
name/password for this call.
For IP-to-IP calls: Assigns the IP Group to the incoming IP call.
This IP Group can later be used for outbound IP routing and as
the 'Serving IP Group' in the Account table for obtaining
authentication user name/password for this call.
For configuring registration accounts in the Account table, see
''Configuring Account Table'' on page 265.
382
Mediant 800B Gateway and E-SBC
Description
Document #: LTRT-10278