HEPE

Horizontal Estimated Position Error.

IAMREQ

Initial Address Message. A mandatory message sent from MSC to FMCC to initiate seizure of an outgoing circuit and to transmit address and other...

IPOSREQ

Interim Standard 41. Cellular Radio Telecommunications Intersystem Operations. Signaling protocol for cellular mobility management. A set of...

Routing ESN

Used by the 9‐1‐1 Tandem switch office to properly route a 9‐1‐1 call. The routing ESN will change whenever the emergency services for the area...