Routing

Introduction

The Edge provides a routing engine that selects an outgoing interconnect (outbound trunk) for a call based on a set of user-defined routing criteria. Edge can handle various call processing functions such as route the call to 2 peers based on percentage load routing, block calls by number. 

Features

Here is the list of different routing criteria that the Edge supports:

• Dialed Number Identification Service (DNIS) – route calls to peers based on called number.
• Calling Line Identification (CLID) – route calls to peers based on calling number.
• Percentage Load Routing – Failover, Load Balancing
• Longest matching prefix, Exactly match number
• Partition routing by CLID tag
• Blocking call by number

Parameters

DNISPrefix applies to DNIS routing.
CLIDPrefix applies to CLID routing.
TagThe partition in CLID routing, used to separate routing realm.
Matching TypeThe method to lookup route is based on the factors:

• Longest Prefix Matching: The longest prefix matching criteria applies while each step is performed. At each step, if multiple matches are found, the one with the longest explicit match is chosen. 
  Example:
  DNIS 1: 65 – Matching Type: Longest Prefix Matching
  DNIS 2: 656 – Matching Type: Longest Prefix Matching
  DNIS 3: 65675 – Matching Type: Longest Prefix Matching
  >> Number 6567501111 matches DNIS 3
  >> Number 6568111111 matches DNIS 2 
  >> Number 6531111111 matches DNIS 1
• Exactly Matching: The server will look up the exact pattern. 
  Example:
  DNIS: 6561234567 – Matching Type: Exactly Matching
  >> Only number 6561234567 matches this rule.

Type PeerOutbound peer that is used for routing outgoing calls. Peer can have the following values:

• Default: after the DNIS is matched, the call will be distributed to the relevant outbound trunks based on the configured Load. 
  • Primary route/secondary route: the call will be routed randomly to the assigned outbound trunks.
• Jump to CLID: after the DNIS routing is matched, the system will go to CLID routing rules which have the same Tag to continue checking.

LoadPercentage of call distribution between 2 peers, value starts from 0 – 100:

• 100: means Failover (always uses the primary peer, the secondary peer will be used only if the call route via the primary route is failed)
• 50: means Load Balancing between peer 1 and peer 2. 
• 0: is the contrary of 100

How to create a DNIS routing rule?