Cisco Emergency Responder

This call type uses the Cisco Emergency Responder (CER) to manage the emergency call. If configured, the call is routed through Aggregation or the Local Gateway. Each cluster has its own CER server. Emergency Calling is provided, regardless of the Class of Service, as long as the phone is registered.

CER includes:

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

  • SIP signaling traffic for SIP trunking is between the SIP trunking Session Border Controller (SBC) and Cisco Unified Communications Manager

  • Media traffic is between the endpoint and SIP trunk SBC

Usage

  • The Emergency number follows the Numbering Plan requirements

  • The Emergency number can include an access code if necessary

  • The Calling Party Number is one of:

    • DDI of the Line or Site Emergency Published Number if the line does not have a DDI

    • Site Emergency Published Number

    • For Extension Mobility where a user logs in to a Remote Site, the Site Emergency Publish Number is used

  • Emergency Calls are based on the device and not the line

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 registered phones

  • DDI of the DN is sent if available; otherwise, Site Emergency Publish Number is sent

Configuration Choices

  • Can be configured to send only the Site Emergency Publish Number for all emergency calls

Redundancy

Available to users without restrictions

Survivability

Not available to users in fallback mode

Class of Service

Available to all Classes of Service

Endpoint Types Supported

  • Cisco IP phones

  • Cisco ATA

  • Cisco VG

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Non-CER Through Local Gateway

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Introduction to PSTN Call Processing and Routing