User's Manual 258 Document #: LTRT-27045
Mediant 1000B Gateway & E-SBC
Table 15-15: Call Cost Comparison between Cost Groups for different Call Durations
Cost Group
Connection
Cost
Minute Cost
Total Call Cost per Duration
1 Minute 10 Minutes
A
1 6 7 61
B
0 10 10 100
C
0.3 8 8.3 80.3
D
6 1 7
16
If four matching routing rules are located in the routing table and each one is assigned a
different Cost Group as listed in the table above, then the rule assigned Cost Group "D" is
selected. Note that for one minute, Cost Groups "A" and "D" are identical, but due to the
average call duration, Cost Group "D" is cheaper. Therefore, average call duration is an
important factor in determining the cheapest routing role.
Below are a few examples of how you can implement LCR:
Example 1: This example uses two different Cost Groups for routing local calls and
international calls:
Two Cost Groups are configured as shown below:
Cost Group Connection Cost Minute Cost
1. "Local Calls" 2 1
2. "International Calls" 6 3
The Cost Groups are assigned to routing rules for local and international calls:
Routing Index Dest Phone Prefix Destination IP Cost Group ID
1 2000 x.x.x.x 1 "Local Calls"
2 00 x.x.x.x 2 "International Calls"
Example 2: This example shows how the device determines the cheapest routing rule
in the Tel-to-IP Routing table:
The 'Default Call Cost' parameter in the Routing Policy rule is configured to Lowest
Cost, meaning that if the device locates other matching routing rules (with Cost
Groups assigned), the routing rule without a Cost Group is considered the lowest cost
route.
• The following Cost Groups are configured:
Cost Group Connection Cost Minute Cost
1. "A" 2 1
2. "B" 6 3
• The Cost Groups are assigned to routing rules:
Routing Index Dest Phone Prefix Destination IP Cost Group
1 201 x.x.x.x "A'
2 201 x.x.x.x "B"
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