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Spacevars
0series
and 
Spacevars
0series2
routing and policy management involves high performance SIP routing with scalable routing policies for service-provider and enterprise networks.

Key Features

  • Screening, blocking, routing, presentation, call type filters
  • Route prioritization
  • Leading digit routing; International routing; URI based routing
  • Digit/parameter manipulation
  • E911 support; Priority Call handling
  • Toll-free routing
  • Least cost routing
  • Number portability

Policy Server Modes

The 

Spacevars
0series
and 
Spacevars
0series2
servers provide the following three routing and policy management options for your network:

  • Embedded Routing Engine (ERE) – ERE provides less routing and policy management functionality and is intended for smaller networks with no complex routing needs.
  • External
Sonus Policy
  • Spacevars
    0company
     Policy Server (PSX)
 – 
  •  –  PSX combines complex call-routing functionality with exceptional capacity to support larger networks.

Spacevars
0product
is configurable to interact with

one or more (

up to nine

) centralized external Sonus Policy Server (PSX), the embedded routing engine (ERE)

centralized external PSXs, or a combination of external PSXs and ERE.

Caption
0Table
1Policy Server Modes

Configuration

Basic ERE

Advanced ERE

 Centralized External PSX

Number of SBCs Deployed
(Small: 1-3, Large: more than 3)

SmallSmallLarge
Routing ComplexitySimpleComplexComplex
 

For performance and capacity comparison of ERE and PSX, refer to Routing Engines Comparison.

Deployment Scenarios

SBC ERE

Basic and Advanced ERE

The ERE provides less routing and policy management functionality and is intended for smaller networks with no complex routing needs. Basic ERE is the default routing engine on the SBC 5000 series for performing basic call routing services. The Advanced ERE is a licensed option for customers requiring expanded routing functionality.

The ERE can be installed by selecting the embedded routing engine (ERE) option while installing the

Spacevars
0product
application using the EMA Platform Mode. For more information on installing 
Spacevars
0product
application (ERE Configuration), refer to Installing SBC Application - ERE Configuration.

Caption
0Figure
1SBC with ERE

The Advanced ERE is a licensed option for customers requiring expanded routing functionality.

Caption
0Table
1Basic ERE vs. Advanced ERE
Features
Basic-ERE
Advanced-ERE
Maximum Number of Routes2,000100,000
Route PrioritizationRoute prioritizationRoute prioritization with more parameters
such as Time of Day and overflow routing.
Routing MechanismsRouting mechanisms such as
User Name and Standard
Destination Based Routing.		Routing mechanisms such as User Name,
Standard Destination Based Routing, Call Type,
Digit Type and Time Range.
Call Screening and Blocking ServicesNot applicableCall screening and call blocking services to
enable a carrier to restrict calls based on either
origination, destination or both.

ERE With External PSX

You can configure the SBC to use an external PSX for routing and the ERE for fallback routing. When the external PSX is up and running, all routing is handled by the external PSX and ERE routing configurations are ignored.

Thus, in the unlikely event that the external PSX goes down, you can fall back to ERE routing by simply setting the SBC's remote server state to 'disabled' from the EMA UI.

Caption
0Figure
1ERE With External PSX

To set up an external PSX for routing, perform the following:

  1. Configure remote server from EMA (see refer to Policy Server - Remote Server for details).
    1. Navigate to Configuration > SystemSetup tab.
    2. Click the arrow next to Policy Server perspective in the navigation panel, and select Remote Server option. The "Remote Server" configuration window displays.
    3. Configure the remote policy server settings to use the external PSX.
  2. Provision routing for the 
    Spacevars
    0product
    in the external PSX using the PSX Manager.
  3. Provision routing from EMA (see refer to Category - Call Routing for details).
    1. Navigate to Configuration > System Provisioning tab.
    2. From the Category drop-down menu, select Call Routing.
    3. Choose applicable perspectives to provision routing using ERE.

 

Info
For more information on the routing and policy management features supported by ERE, refer to Routing Engines Comparison. 

Centralized PSX

The centralized PSX server combines call routing  routing functionality with the exceptional capacity of  of storing tens of millions of call routes in a single database. This 

Spacevars
0product
-Centralized PSX deployment distributes that routing intelligence to every PSX server in the network and simplifies the provisioning process. For more information on Sonus Policy Server (on PSX), refer to the Policy Server (PSX) Documentation.  

The following figure depicts the

Spacevars
0product
deployed with external PSX and EMS.

Caption
0Figure
1SBC with External PSX and EMS

To configure external PSXs as Active and Standby remote policy servers from the 

Spacevars
0series
or
Spacevars
0series2
server, see refer to Configuring SBC to Use for External PSX.

 

 

Configurations Controlled by PSX

The following SBC configuration objects are controlled by the PSX.

  • Aor Group
  • Call Parameter Filter Profile
  • Call Recording Criteria
  • Carrier (Global object)
  • Class of Service
  • Codec Entry
  • Codec List Profile
  • Codec Routing Priority
  • Country (Global object)
  • Crypto Suite Profile
  • DM/PM Criteria (Digit Parameter Handling object)
  • DM/PM Rule (Digit Parameter Handling object)
  • e911 (Servers object)
  • e911VpcDevice (Servers object)
  • Element Routing Priority Profile
  • enumDomainName
  • enumDomainName LabelEnum Domain (Servers object)
  • Enum Service (Servers object)
  • Feature Control Profile
  • Holiday Profile
  • IP Signaling Peer Group
  • Ip Signaling Profile
  • Lwresd Profile
  • Media Qos KPI Profile
  • Call Routing
  • NPA/Nxx (Global object)
  • Number Globalization Profile
  • Numbering Plan (SIP Trunk Group Policy)
  • Number Translation Criteria (Digit Parameter Handling object)
  • Packet Service Profile
  • Prefix Profile (Digit Parameter Handling object)
  • Route (Call Routing object)
  • Routing Label (Call Routing object)
  • Script (Global object)
  • Signaling Profile
  • Signaling QoS KPI Profile
  • SIP Domain (Global object)
  • Srs Group Cluster
  • Srs Group Profile
  • Subscriber (Global object)
  • Time Range Profile
  • Trunkgroup
  • Voip Subscriber

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