Glossary of Terms

Understand basic Public Safety definitions and terms.

TG/TGN/TGW

Definition:

Trunk Group.

Trunk Group Number. A way of identifying a trunk group.

Trunk Gateway.

Pilot #

Pilot number usually refers to a trunk group implementation. A trunk group is a set of individual circuits or trunks. Each trunk can be individually...

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ITG

Ingress Trunk Group.

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OTG

Originating Trunk Group. The trunk group that an emergency call was routed prior to arriving at the ECMC.

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Trunk Group Alternate Group

The alternate route for a high‐usage trunk group. A trunk group alternate route consists of all the trunk groups in tandem that led to the distant...

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