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Yealink DECT Phone System Deployment Guide

This guide provides instructions and best practices for deployment of the Yealink W52P

IP DECT phones and repeaters RT10, which is intended for qualified technicians (or

administrator) who will deploy the DECT phone system. To complete the deployment,

prior knowledge of DECT telephony concepts are necessary. For a better understanding

of W52P IP DECT phones and repeater RT10, refer to the related documentations listed

below.

At the completion of this guide you should be comfortable with the following:

Using the handset to measure the radio signal strength and signal quality.

Selecting a proper mounting location for base stations and repeaters.

Operating and configuring of the base station, repeater and handset.

The following related documents for W52P IP DECT phones are available:

Quick Installation Guide, which describes how to assemble W52P IP DECT phones.

Quick Reference Guide, which describes the most basic features available on

W52P IP DECT phones.

User Guide, which describes the basic and advanced features available on W52P

IP DECT phones.

DECT Repeater RT10 User Guide, which describes how to use repeater RT10 with

W52P IP DECT phones.

Auto Provisioning Guide, which describes how to auto provision W52P IP DECT

phones using the configuration files.

Yealink DECT Phone System Solution, which describes the W52P DECT phone

system and major features of IP DECT phones.

Yealink DECT Phone System Deployment Guide

About This Guide...................................................................1

Documentations...............................................................................................................1

Table of Contents...................................................................2

Site Planning .........................................................................3

Radio Coverage Planning ...............................................................................................3

Site Survey ....................................................................................................................... 4

Area Dimensions and Site Density.................................................................................. 5

Deployment Guidance ..........................................................6

Deploying W52P DECT Phone System.............................................................................6

Deployment in a Single Floor Building ........................................................................6

Deployment in a Wider Single Floor Building .............................................................8

Deployment in a Multi-Floor Building ..........................................................................9

Deployment in a User Dense Building....................................................................... 10

Deploying W52P DECT Phone System with Repeater ..................................................11

Traffic Measurements ....................................................................................................13

Recommended Placement of Base Stations and Repeaters.......................................13

Yealink DECT Phone System Deployment Guide

Deployment of base stations and repeaters is a central aspect of any DECT phone

solution. To successfully deploy the DECT phone system, the deployment concepts

explained in this guide must be followed.

A radio coverage plan must be performed to determine the optimal location and the

total number of base stations and repeaters required for a given installation. The base

station provides a typical coverage radius and propagates in all directions.

Inside a building: radius < 50m, depending on the building architecture and wall

material.

Outside in free air: radius < 300m, depending on reflections and surroundings.

Yealink DECT repeater RT10 is designed in accordance with DECT standard. The RT10

repeater has the same radio coverage as the base station. When additional coverage

area is needed, a repeater should be added, which is similar to adding a base station

on the multi-cell system (the number of call paths is not increased).

A base station coverage plan is required to indicate:

Areas where radio coverage is required

Areas excluded from radio coverage due to the proximity of sensitive electronic

equipment

Areas where radio coverage is not required

Areas where radio coverage is not feasible or requires repeaters

Objects inside buildings

Yealink DECT Phone System Deployment Guide

Site survey process is an information gathering process. The information received in the

site survey determines user requirements and the number of cells required to support

traffic. Begin the site survey by interviewing the user representative familiar with the full

expectation of coverage and performance of IP DECT phone solution.

Building details

An initial look at the architecture plans will provide a global overview of the site. System

deployment and installation depend upon the following building details.

Building identification

Construction materials, such as walls, floors, ceilings

Type of use, such as for office, hotel, factory, or store

Dimensions

Number of floors

Height of floors

Partitioning of floors

The following table gives some general guidelines on the degree to which certain

materials will obstruct the radio signal.

Materials

Degree of Attenuation

Examples

Air

None

Open space

Wood

Low

Door, floor, partition

Plastic

Low

Partition

Glass

Low

Un-tinted windows, partition

Tinted glass

Medium

Tinted windows, partition

Living creatures

Medium

Crowds, plants

Bricks

Medium

Walls

Plaster

Medium

Partitions

Ceramic

High

Tiles

Concrete

High

Load-bearing walls, floors,

pillars

Metal

Very High

Reinforced concrete, metal

cabinet

Signal penetration capability between the base station and handset is strong, while the

Yealink DECT Phone System Deployment Guide

signal penetration capability between the repeater and handset is weak relatively.

Counting the number of users

Counting the number of users involves knowing how many users there are, their

distribution per location, and their mobility. As a rule, the deployer should know the

information regarding user mobility. The following information should be also provided

for the deployer:

The number of handset users

The potential growth of handset users

The above average and below average traffic density

Traffic requirements are determined for each area. The deployer calculates system

requirements to support user traffic.

In more user dense sites, for example in office or enterprise environments, different

sub-entities or groups may exist, where each group of users has mobility within their

own system cell/single base station coverage area. As users have no mobility over the

whole local site, the phenomenon of increasing number of mobile users by adding new

base stations is common. However, increased number of base stations may cause

quality deterioration.

To ensure a higher-quality audio experience and avoid interferences, the number of

base stations for a local area and density between areas should be taken into account

when deploying multiple DECT systems in a more user dense site. Yealink provides five

DECT systems for different radio frequencies usage in various countries (or regions). The

maximum number of base stations may vary among countries (or regions).

The following table lists the suggested maximum number of base stations that can be

deployed in a 50 meter radius area for these DECT systems.

DECT System Name

Maximum Number

European

North America

Taiwan

Brazil

Korea

Yealink DECT Phone System Deployment Guide

This chapter describes how to choose appropriate locations for base stations and

repeaters on different sites. The purpose of this chapter is to familiarize you with the

procedures that are needed to carry out a site plan.

The following equipments are required for the deployment:

Base Station

Handset

Repeater

The following explains the procedures required to identify the quantity and position of

the base stations at prospective customer sites.

Note

When deploying in a single floor building (the width of the building is less than 100

meters), the deployment process consists of the following steps:

Identifying initial critical points on the floor plan

A critical point is a place that can be difficult for the radio signal to reach, such as a

corner of a room, lifts and stairwells. Determine the critical points for placing the

deployment base stations.

1. Select the first critical point located in the corner furthest from the center areas

of the premises. Name this point P1.

2. Select a nearby critical point adjacent to the first one and name it P2.

Locating the area center of the first base station

1. Place the deployment base stations on the critical points.

2. Set up communications between base stations and cordless handsets.

3. Measure the radio coverage and determine the limit of the radio coverage of

two critical points.

4. Determine the intersection point of the boundary lines of different radio

coverage cells. An intersection point will indicate the possible best location for

The following figures do not consider building elements that may influence the signal

strength.

Yealink DECT Phone System Deployment Guide

mounting the permanent base station. The final position for the first base

station is the intersection point (position 3) of the two radio coverage cells.

Locating the area center for the second base station

1. Place the deployment base station at position 3.

2. Repeat the measurement process to determine the limit of the radio coverage.

3. Place the deployment base stations at position P4 and P5.

4. Measure the radio coverage and determine the limit of the radio coverage of

these two points.

The final position is again the intersection point of the radio coverage cells

indicated by the broken lines, shown by position 6 in the following figure.

5. Follow the above steps to locate area centers for other base stations. Once

identified, place the deployment base station at intersection points where

each of the coverage cells crossed during deployment. Verify the coverage

cells that reache all areas expected.

Note

Make sure the new critical points are placed well within the deployed radio coverage

areas.

For regular mobility users, they can search for the best base station (signal strength is

the strongest) from the four registered base stations before placing a call. For more

information, refer to

Yealink W52P User Guide

Yealink DECT Phone System Deployment Guide

In some deployment, there is no overlap between the deployment base stations of

critical points. To deploy in these environments:

Mark the areas of the site to be deployed.

Place the deployment base stations on the critical point P1.

Set up a communication between the base station and cordless handset.

Measure the radio coverage and determine the limit of the radio coverage of the

critical point.

Measure the signal in a 45 degree angle towards the center of the area.

Proceed to the critical point P2 and perform the same procedures.

The area centers are the final positions for base stations, shown by position 3 and 4

in the following figure.

Determine the limits of the coverage areas from cell centers (position 3 and 4).

Place the deployment base stations at cell centers to determine the final position

(position 7) for the third base station.

Yealink DECT Phone System Deployment Guide

The deployment procedure varies according to:

Radio transmission and reception through the floors

Similarities and differences between floors

The study of transmission and reception through the floors determines whether several

floors will be included in a same coverage area. There are two approaches in

deploying a multiple storey building:

If the degree of attenuation of the building construction materials (e.g., wood) of

the building is low, deploy the base stations as follows:

1. Place the base station on an intermediate floor on the site.

2. Without moving the base station, go to the floor above, then measure the

horizontal coverage at this location.

3. Without moving the base station, go to the floor directly below and measure

the horizontal coverage at this location.

4. Arrange the base stations with one base station in the centre and the others

surrounding it, as shown in the following diagram.

If the degree of attenuation of the building construction materials (e.g., metal) of

the building is high, follow the above introduced steps (single floor) to deploy each

floor as individual parts. For more information, refer to Deployment in a Single Floor

Building on page 6.

Note

The similarities between the floors do not exclude variations in the radio transmission

and reception. You are advised to check the sound quality on each floor.

We recommend that you do not deploy base stations on the same vertical line.

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