Glossary of Terms

Understand basic Public Safety definitions and terms.

IMSI

Definition:

International Mobile Subscriber Identity. An ITU‐T specification used to uniquely identify a subscriber to mobile
telephone service. The IMSI is a 50‐bit field which identifies the phone’s home country and carrier.

Selective Router Bridge/Transfer

A scenario where IEN Voice has delivered a call to a PSAP supported by IEN Voice. That PSAP chooses to bridge on a PSAP that is not connected...

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Busy Tone

The sound provided to a caller to indicate the desired destination is unavailable. (60 IPM (interruptions per minute).)

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Real-Time

An operating mode in which the information to be handled is sent, processed, and returned in a time interval that is short relative to the...

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Location by-value

In the context of location information to support IP based emergency services, a PIDF‐LO containing the location of an IP end‐point that can be...

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