# Emergency calling note

- Study notes, not legal advice and not an emergency plan.
- The FCC MLTS page describes direct 911 dialing, notification, and dispatchable location for covered US systems.
- Cisco Emergency Responder maps a switch port to an ERL and an ELIN. Confirm Release 15 before you build.
- A PSAP callback is a separate call toward that ELIN.
- Rules and carriers outside the pages this lab opened stay on a confirm row.

## Sources and go deeper

Independent, free, learning-only student project.

Opened 2026-10. A row marked confirm has no link, because that page was not verified.

- FCC. [FCC, Kari's Law and RAY BAUM'S Act for multi-line telephone systems](https://www.fcc.gov/mlts-911-requirements). last checked 2026-10
- Wikipedia. [Enhanced 911 (Wikipedia)](https://en.wikipedia.org/wiki/Enhanced_9-1-1). last checked 2026-10
- Cisco. [Cisco Emergency Responder product support](https://www.cisco.com/c/en/us/support/unified-communications/emergency-responder/series.html). last checked 2026-10
- Cisco. [Plan for Cisco Emergency Responder, Release 15](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cer/15/english/administration/guide/cer0_b_cisco-emergency-responder-administration-guide-15/cer0_b_cisco-emergency-responder-administration-guide-1401_chapter_01.html). last checked 2026-10
- Cisco. [Configure Cisco Unified Communications Manager, Emergency Responder 15](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cer/15/english/administration/guide/cer0_b_cisco-emergency-responder-administration-guide-15/cer0_b_cisco-emergency-responder-administration-guide-1401_chapter_011.html). last checked 2026-10
- Cisco. [Cisco Emergency Responder Administration Guide, Release 15](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cer/15/english/administration/guide/cer0_b_cisco-emergency-responder-administration-guide-15.html). last checked 2026-10
- Cisco. [Cisco Unified Communications Manager product support](https://www.cisco.com/c/en/us/support/unified-communications/unified-communications-manager-callmanager/series.html). last checked 2026-10
- Cisco. [System Configuration Guide for CUCM, Release 15](https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/15/systemConfig/cucm_b_system-configuration-guide-15.html). last checked 2026-10
- Law. United States public-law text for Kari's Law. confirm. The congress.gov bill page returned a bot challenge, and the PDF text was not readable in this session. The FCC MLTS page that did open is listed separately. last checked 2026-10
- Law. Emergency-calling rule outside the FCC MLTS page. confirm. No statute outside that FCC page was opened. Confirm the rule where the site operates. last checked 2026-10

Room or sheet file: sources/e911/sources.json