Alcatel Voice over WLAN (R1.1.1) Specifications download pdf (Page 50)

The topology has to be studied in order to ensure enough bandwidth for voice

communication.

The IP scheme used (L2 and L3) needs to be analyzed to fit the architecture.

To ensure correct RF coverage for providing seamless handovers, a Voice site survey is

mandatory.

4.4.1.3 DECT

To meet corporate user mobility requirements in company premises, the Alcatel-Lucent OmniPCX

Enterprise Communication Server offers a wireless telephone service based on the international

DECT (Digital Enhanced Cordless Telecommunications) standard.

The DECT standard is a cellular technology that uses the 1880/1900 MHz frequency band. DECT is

available:

In all European countries

In a large number of Asian and African countries. The 1900/1930 MHz bandwidth is used for

China, Thailand and Latin American

The DECT standard is designed to provide mobility services in environments with high user density

such as large buildings or campuses: 10 000 Erlangs/Km sq. (GSM 200 Erlangs/Km sq., DCS 500

Erlangs/Km sq.).

This standard is based on a digital technology providing high quality communication, with Roaming

and Handover (Handoff) capabilities.

CDCS (continuous dynamic channel selection) is a unique feature that ensures that every mobile

phone operates on the best available radio channel. In addition, no frequency planning is required

when adding a radio base station. All base stations can transmit on any channel.

The Alcatel-Lucent OmniPCX Enterprise Communication Server integrates mobility components

based on the DECT technology, offering ergonomics, security, and user-friendly management.

The DECT wireless solution is fully integrated with the Alcatel-Lucent OmniPCX Enterprise VoIP &

TDM solutions. A DECT (Digital Enhanced Cordless Telecommunications) set is seen as a TDM UA

set using the AGAP (Alcatel-Lucent Generic Access Profile) protocol.

The DECT mobility service is built by connecting DECT radio base stations to the Alcatel-Lucent

OmniPCX Enterprise. This infrastructure offers indoor and/or outdoor radio coverage enabling any

DECT handset to be connected to PCX services and applications, and to operate as any other

proprietary extension of the OmniPCX Enterprise.

The DECT phone set is a mobile device that the user can use as they move around. Using their

DECT handset, the user can make or receive calls and also use phone services in the same way as

UA Reflexes (digital) telephone users.

The base station is the radio interface between the DECT handset and the PCX which provides the

corporate phone services. An individual base station has a range of approximately 300 m in a free

geographic area. This area is referred to as a "cell" and the combined group of cells is referred to

as the "coverage area." An OmniPCX can support several base stations

The DECT solution offers user mobility and roaming services to make a call and then physically

move from one cell to another cell through the company coverage area. The PCX maintains each

call during handoffs between cells.

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Alcatel Voice over WLAN (R1.1.1) Specifications Page 50