Glossary of Terms

Understand basic Public Safety definitions and terms.

E9-1-1

Definition:

Enhanced 9‐1‐1. An emergency service capability that selectively routes the wireless or wireline emergency service call
to the appropriate PSAP and allows that PSAP to query ALI for the caller’s location.

E9-1-1 Service Provider

The entity responsible for establishing and overseeing the functions necessary to accept 9‐1‐1 calls from carriers and deliver to PSAPs using...

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CELL_ESRD

A 10‐digit number used to support routing of wireless 9‐1‐1 calls through the 9‐1‐1 network. The CELL_ESRD is utilized atthe PSAP for static ALI...

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MT 9-1-1 SMSC

Mobile Terminated 9‐1‐1 Short Message Service Center. The MT 9‐1‐1 SMSC sends responses from the PSAP to the subscriber.

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TXT29-1-1

A service that allows mobile phone users to text, rather than call, 9‐1‐1 during an emergency.

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