AudioCodes Mediant 500L - Alternative Routing for Tel-To-IP Calls; IP Destinations Connectivity Feature

Version 7.2 525 Mediant 500L Gateway & E-SBC
User's Manual 24. Routing
Parameter Description
LCR Feature
lcr-enable
[GWRoutingPolicy_LCREnabl
e]
Enables the Least Cost Routing (LCR) feature for the Routing Policy.
 [0] Disable (default)
 [1] Enable
For more information on LCR, see ''Least Cost Routing'' on page
276.
Note: LCR is applicable only to Tel-to-IP routing.
Default Call Cost
lcr-default-cost
[GWRoutingPolicy_LCRDefaul
tCost]
Defines whether routing rules in the Tel-to-IP Routing table that are
not assigned a Cost Group are considered a higher cost or lower
cost route compared to other matched routing rules that are
assigned Cost Groups.
 [0] Lowest Cost = (Default) The device considers a matched
routing rule that is not assigned a Cost Group as the lowest cost
route. Therefore, it uses the routing rule.
 [1] Highest Cost = The device considers a matched routing rule
that is not assigned a Cost Group as the highest cost route.
Therefore, it is only used if the other matched routing rules that
are assigned Cost Groups are unavailable.
LCR Call Duration
lcr-call-length
[GWRoutingPolicy_LCRAvera
geCallLength]
Defines the average call duration (in minutes) and is used to
calculate the variable portion of the call cost. This is useful, for
example, when the average call duration spans over multiple time
bands. The LCR is calculated as follows:
cost = call connect cost + (minute cost * average call duration)
The valid value is 0-65533. The default is 1.
For example, assume the following Cost Groups:
 "Weekend A": call connection cost is 1 and charge per minute is
6. Therefore, a call of 1 minute cost 7 units.
 "Weekend B": call connection cost is 6 and charge per minute is
1. Therefore, a call of 1 minute cost 7 units.
Therefore, for calls under one minute, "Weekend A" carries the lower
cost. However, if the average call duration is more than one minute,
"Weekend B" carries the lower cost.
24.4 Alternative Routing for Tel-to-IP Calls
The device supports various alternative Tel-to-IP call routing methods, as described in this
section.
24.4.1 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 Tel-to-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 526).
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: