IMG 1010 - Overview of Routing

The IMG router is a robust routing engine that selects an outgoing channel for an incoming call based on a set of user-defined routing criteria. It can perform pre and post routing translation and handle various call processing functions such as rerouting an incoming call to a different channel group or overriding cause code treatments.

Below is a list of different routing criteria that the IMG supports.

• Dialed Number Identification Service (DNIS) - route on called number.

• Automatic Number Identification (ANI) - route on calling number.

• Channel Group Routing - Call can be routed to a specific channel group.

• Channel Group/Route List - Channel Groups can be added to a route list.

• IP Traffic Management (Call Admission Control)

• Q.931 Nature of Address - Route on called and/or calling Nature of Address

• Time of Day Routing, Day of Week/Day of Month/Day of Year Routing.

• Route on a translated digit. (Digit Translation Routing. Pre and Post)

• Local Number Portability. (LNP)

• Route Calls based on FCI M-bit Parameter

• Explicit Call Transfer (ECT)

• Two Bearer Channel Transfer (TBCT)

• Release Link Trunk (RLT)

• Percentage Based Routing

• Route to a Cause Code

• Route to a treatment. (Pre-Call Announcements or branding

• Multiple routing algorithms per trunk group or groups of trunks for IP to TDM and IP to IP with a-law and µ-law conversions

• FCI (Forward Call Indicators)

• SIP Diversion Header or Call Forwarding

• Trunk Group Parameters - Route Calls based on "tgrp" parameter in URI or Contact Header

• Retries based on Cause Code - Retry channel groups in route list based on cause codes.

• DNS SRV Queries - Use SRV or Service Record to specify which sip server to route to
   

Routing Features

• The IMG supports up to 66 total Route/Cause Code/Service Routing Tables per EMS. Each table can support up to 5000 entries. The IMG has a max capacity of 100,000 entries, or 20 tables each with 5000 entries.* Each IMG supports 4 route tables unique to the system, allowing the GateControl EMS to control, monitor, and maintain 250 discrete gateways.

• Route tables can be specific to a particular gateway, or they can be global.

• Route verification See IMG 1010 - Validating Your Configuration

• Ability to import a .csv file to be used for routing and translation tables.

• Route from one route table to another with the ability to prevent looping.

• Configure the IMG to accept calls from multiple gateways with one External Gateway Entry (Gateway Mask field).

• Translation

• Appending Info Digits

• Translation based on Channel Group

• ANI and DNIS Translation
   

Routing Process

The following diagram shows the process the IMG goes through to route a call, and the ClientView GUI panes you use to configure various routing elements. Grey boxes represent ClientView configuration panes.

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