Local Gateway (LBO)

This call type occurs in the following situations for an endpoint in a site that has Local Gateway (Local Breakout):

  • When the endpoint places a call to reach a destination in the PSTN through the Local Gateway

  • When the endpoint receives a call from the PSTN through the Local Gateway

The Local Gateway is used to connect to the PSTN locally. In this case, it must be possible on a per-call basis to select the Local Gateway breakout and there must be selectable per-site routing through the Local Gateway (that is, International, National, Service, and so on).

The call type includes:

  • SIP/SCCP signaling traffic for the endpoint between the endpoint and Cisco Unified Communications Manager

  • SIP signaling traffic for the Local Gateway between the Local Gateway and Cisco Unified Communications Manager

  • Media traffic between the endpoint and Local Gateway

Off-Net Call (Local Gateway)

dialplan-Off-Net-Call-localGW

Usage

  • Called number follows the Numbering Plan requirements

  • Called number can include an access code if necessary

  • Any target number can be used, unless it is restricted by Class of Service

  • Off-net dialing can be completed in two ways:

    • When PDD is unavoidable, user can wait for interdigit timeout or press # without waiting for interdigit timeout

    • E.164 numbering format is supported with + as the first digit

  • The calling number is one of:

    • DDI of the DN

    • Site Published PSTN number if the DN does not have a DDI, or

    • Site Published PSTN number regardless of the availability of DN DDI

Accessibility

User can perform Off-Net call from any endpoint registered with Cisco Unified Communications Manager

Usage Example

User can dial any PSTN number from their phone

Default Configuration

  • Available to all users

  • DDI of the DN is sent if available; otherwise, Site Published PSTN number is sent

  • Codec depend on trunk bandwidth

Configuration Choices

  • Feature availability cannot be changed

  • Can be configured to send only the Site Published PSTN number as the Calling Number PRI, BRI, and so on

Redundancy

Available to users without restrictions

Survivability

Available to users in fallback mode, with the following restrictions:

  • Phone must be registered to the SRST gateway

  • No COS is available during survivability mode

Endpoint Types Supported

  • Cisco IP phones

  • Cisco ATA

  • Cisco VG

Examples

 
Case 1: Using Trunk Transformation CSS to convert DN to DDI
Phone A (DN=8 300 1234; External Mask=+14085289001)
Dial 9 12134225001
Local GW Trunk {uses Called, Calling, Redirecting and Connected
Transformation CSS}
Outbound from CCM - CDPN = +12134225001; CGPN=+14085289001
Inbound Connected Number +12134225001

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VoIP Trunking On-Net Call

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Aggregation (CBO)