Nortel 1000 Features And Services Fundamentals page 379

Centrex Switchhook Flash
Contents
This section contains information on the following topics:
"Feature description" (page 379)
"Operating parameters" (page 380)
"Feature interactions" (page 381)
"Feature packaging" (page 382)
"Feature implementation" (page 382)
"Feature operation" (page 385)
Feature description
Centrex Switchhook Flash (THF) permits the user to signal the Central
Office (CO)/Public Exchange during an established CO call, requesting
activation of a Central Office based service. Such services can include Call
Transfer, Three-way Calling, Malicious Call Trace, Conference, or Autodial
Tandem Transfer. For more information on these services, please refer to
the feature descriptions contained within this document.
The feature is useful when Centrex is the backbone of the service network.
Centrex Switchhook Flash (THF) is supported by the following trunk types:
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Copyright © 1994–2008, Nortel Networks
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Automatic Identification of Outward Dialing (AIOD)
Common Control Switching Arrangement, Automatic Number
Identification (CCSA ANI)
Centralized Automatic Message Accounting (CAMA)
Central Office (CO)
Common Control Switching Arrangement (CCSA)
Direct Inward Dial (DID)
Foreign Exchange (FX)
Nortel Communication Server 1000
Features and Services Fundamentals — Book 2 of 6 (C)
NN43001-106 02.04 Standard
Release 5.5 9 May 2008
379