CoS (Class of Service)

CoS (Class of Service) is a designation in E9‑1‑1 that defines the service category of the telephony service. A few examples are residential, business, Centrex, coin, PBX, VoIP and wireless Phase II (WPH2).

Fixed (Static)

VoIP Class of Service sold as not having nomadic capability. Refers to an IP end-point that cannot move, is always in same location and always accesses a network from the same point.

FX (Foreign Exchange) Service

A telephone line switched in an exchange or central office other than the exchange or central office area in which the telephone is located.

NENA-STA-015, NENA Standard Data Formats for 9-1-1 Data Exchange &amp; GIS Mapping