Installation, Administration and Maintenance
Aastra Telecom
Page: 5 (47)
Access Point
Access Point
In the context of the Aastra SIP-DECT
TM
solution, an
Access Point and a Radio Fixed Part (RFP) are
interchangeable.
Asterisk
Asterisk
Asterisk is a complete Open Source PBX in software. It
runs on Linux, BSD and MacOSX and provides many
features. Asterisk supports voice over IP in many
protocols, and can interoperate with almost all standards-
based telephony equipment.
DECT
Digital Enhanced Cordless Telecommunication
•
The standard (ETS 300 175) essentially specifies the
air interface, known as the radio interface. Voice and
data can both be transmitted via this interface.
•
Its technical key characteristics for Europe are:
•
Frequency range: approx. 1880 – 1900 MHz
(approximately 20 MHz bandwidth)
•
10 carrier frequencies (1728 kHz spacing) with 12
time slots each
•
Doubling the number of time slots (to 24) using the
TDMA process
•
Net data rate per channel of 32 kbps
(for voice transmission using ADPCM)
•
Voice coding using the ADPCM method
Its technical key characteristics for North American are:
•
Frequency range: approx. 1920 – 1930 MHz
(approximately 10 MHz bandwidth)
•
5 carrier frequencies (1728 kHz spacing) with 12
time slots each)
•
Doubling the number of time slots (to 24) using the
TDMA process
•
Net data rate per channel of 32 kbps
(for voice transmission using ADPCM)
•
Voice coding using the ADPCM method
GAP
Generic Access Profile
•
GAP is the abbreviation for Generic Access Profile
•
The GAP standard (ETS 300 444) is based on the
same technology as DECT, but is limited to the most
important basic features. This standard was created in
order to allow telephones of different vendors to be
