User`s guide

3(31)
Datum/Date
Rev
Dokumentnr/Documentnr
Uppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked
Tillhör/Referens-File/Reference
99-07-15 C
265/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
DECT Generic Access Profile
DECT is a general radio access technology for short range wireless telecommunications. It is a high capacity, pico-
cellular digital technology for cell radio depending on application and environment.
The objective of the Digital Enhanced Cordless Telecommunications (DECT) standard is to use digital radio
technology to improve the performance of wireless voice communications.
In order to enhance standardisation for specific DECT applications, a number of profiles have been developed.
A profile is a protocol specification, which is used in conjunction with the DECT air interface. A profile defines a
selection of messages and procedures from the DECT standard, and gives an unique description of the DECT air
interface for specified service(s) and application(s).
GAP is the most important of all access profiles. It assures the basic interoperability of cordless phones and fixed
parts (radio exchange and base stations) from different suppliers. GAP is also essential for public access networks,
as customers will be able to use the same cordless phones at home, in the office, and in the street.
The Generic Access Profile (ETS 300 444) specifies the minimum functionality that is required in order to support
basic telephony services. The functionality of the profile consists of the minimum mandatory requirements that allow
a 3,1 kHz teleservice connection to be established, maintained and released between a fixed part and a cordless
phone with the appropriate access rights, irrespective of whether the fixed part provides residential, business or
public access services.
Basic interoperability for speech applications is defined in GAP. In practice this implies that customers have the
freedom to purchase systems and cordless phones separately. They can pick the best featured system and combine
it with the cordless phones with the best functionality, provided the functionality is included in GAP.
In addition, GAP requires that multiple subscriptions are supported by cordless phones. Multiple subscriptions allow
the use of one single handset in multiple environments and systems.
Capacity
The ASB 150 02 integrated cordless handles a max. of:
Generic Access Profile:
- 60 base stations ( 7 IC-LUs + 1 IC-CU2 ) and
- 210 cordless phones.
A-protocol:
- 56 base stations ( 7 IC-LU’s ) and
- 108 cordless phones.
The total capacity of wired and cordless phones depends on the max. capacity of the ASB 150 02 system, it does
not, however, exceed 288 extensions.
Max 1 IC-CU_ and 7 IC-LUs per system may be installed. The number of necessary IC-LUs depends on the required
number of base stations and speech channels ( see also chapter "Equipment" in this document ).
Commercial point of view
From the commercial point of view, the number of cordless phones is determined by the FECU (=Feature Enabling
Control Unit), a plug for the IC-CU_. For basic configurations with up to 8 portables, no FECU on the IC-CU_ is
required. For larger configurations, FECUs have to be plugged on the IC-CU_. The following steps are available
(number of portables):
16, 24, 32, 48, 64, 108 and 210 (GAP only) portables.
Using the DECT GAP-protocol, the system FECU for the CPU-D4 is mandatory. Without FECU on the CPU-D4 only
outgoing calls are allowed !