Product manual

System description, DECT air interface
Technical Product Manual - DCT1800-GAP
TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C
© 2006
42
Fig. 31 Official and simplified terms in DECT
6.6 Generic Access Profile (GAP)
The Generic Access Profile (GAP) defines general interoperability requirements for any private or
public DECT application supporting a 3.1 kHz telephony service. It includes mobility management
and security features.
Interoperability with equipment from different manufacturers and with different systems is provided for
a specific service and application if the Fixed Part (FP) and Portable Part (PP) conform to an ETSI
defined profile standard. A profile defines a selection of procedures and messages from the DECT
Common Interface (CI) standard and gives an unambiguous description of the air interface for specified
network features, datalink and medium access control layers. Whether the provision of a feature or
service is mandatory or optional is stated separately for fixed parts and portable parts.
The network layer contains features that are of interest to the user of the portable part (air interface)
and features that are related to the fixed part and/or telephone exchange. Some of these features are
described in detail. For information about the services that are completely handled within the DECT
layers, e.g. antenna diversity, please refer to the DECT CI standard ETS 300 175, parts 1 to 9.
Global
network
(public
or
private)
Central
Control
Fixed Part
(CCFP)
Radio
Fixed
Part
(RFP)
Radio
Fixed
Part
(RFP)
Portable
radio
Termination
(PT)
Portable
radio
Termination
(PT)
End
System
(ES)
End
System
(ES)
Inter-
Working
Unit
(IWU
Fixed radio
T ermination (FT)
Fixed
Part (FP)
Portable Part (PP)
DECT air
interface
Radio
exchange
Base
station
Cordless
phone
Official
DECT
terms
Simplified
terms
Base
station
Cordless
phone
Portable Part (PP)
DECT system
018