REPEATER

PLEASE READ PRIOR TO PURCHASING OUR PBX SYSTEMS

The Circle Communication wireless phone system (PBX) is ideal for smaller offices and home office use.

However,it is not intended for longer ranges than a typical 2.4 GHz phone covers.

Some important points:

The new 2.4GHz system's signal will penetrate walls better and travel further distances that a 5.8 GHz phone.

As with all 2.4GHz phones, there will be competition with wireless computer networking signals.

So, it is not recommended for an environment which operates a wireless network.

You will achieve the best results when there is a maximum of one floor between the base and receiving units

and just a few walls within a 3,000 sq ft area.

Moving the base two stories away, adding more than a few walls or traveling more than 3,000 sq ft will

cut down on the signal strength.

The nature of how various frequencies move in open air and through materials is an important factor

in understanding how to recommend a cordless telephone system.

In open space (free field), all cordless devices are limited to the power that can transmit and be received for 1000ft.

That is why regardless of frequency, all cordless devices are rated at a range of 1000ft.

However, how frequencies work inside a building or from the inside to the outside of buildings is very dependent

on the band utilized by a system. The lower the frequency, the better that frequency is at penetrating walls

or bending around corners. This means that 2.4G is better than 5.8G.

To use a simple example, when you hear music in a building it is the bass that penetrates.

The higher frequencies get absorbed or reflected.

The Circle system specializes in the smaller environments, and is not designed for large office buildings

or for homes with several floors and many dense walls. The range of the phone system is not compatible

when large quantities of mason or concrete construction is used.

Application of 2.4G Repeater in a multi-cell environment

The 2.4G Repeater is designed solely to operate with the Circle 2.4G WPBX310 ER system.

1.0 Introduction

A 2.4G Repeater is a new building block, to be used in 2.4G installation to extend the radio coverage

of the system.

Please Note: The 2.4G Repeater is not a base station and does not increase the number of 2.4G traffic

channels.

1.1 Features

• Handles simultaneously two active speech channels.
• Powered by an external power adaptor.
• Weight : 500 gms.
• Dimension : 130(L) x 100(W) x 30(H) mm

1.2 Installation

It is very easy to install the 2.4G Repeater. The only connection is to the main power via a power adaptor.

The normal method of establishing 2.4G multi-cell installations is to make pre-installation site coverage

tests to map out the coverage and thereby determine the necessary number of 2.4G Repeaters.

When the system is installed and tested, gaps in the coverage may be found often in areas with limited

traffic e.g. basements, lofts or outdoor areas or the customer may have new requirements.

The Repeater should be placed on a raised surface, desk, shelf or wall-mounted by adhesive pads so as

to maximize RF transmission performance.

The 2.4G Repeater is not to be physically connected to the 2.4G base station.

In principle the installation of the Repeater could be made by the customer, as the 2.4G Repeater

only has to be located where required and be connected to 110/220VAC to function as a part of

the 2.4G installation. No changes have to be made in to the 2.4G system. In fact it is easier to

install a Repeater in a system than to register a new 2.4G handset extension.

Green LED - to indicate the strength of the radio signal within the operating area. Blinking means

the Repeater is out of range. Continuously ON means the Repeater is linked to the 2.4G base.

Red LED - to indicate the usage status of the two traffic (speech) channels. Continuously ON

means one or/and two speech channel are in use.

"Register" button - used to register to the 2.4G base station. First press the “Set” button

on the main base station (WMC), the Green LED starts blinking. Then press and hold the “Register”

button on the Repeater. If the registration is completed and successful, the Red LED turns on continuously.

Finally press the “Set” button on the main base to return to normal mode.

2. Application of the 2.4G Repeater

The 2.4G Repeater has a similar coverage to the 2.4G WMC ER main base station, however only with two

active traffic channels. A 2.4G Repeater must be placed within the coverage of the original 2.4G installation,

and therefore the 2.4G Repeater expands the coverage of the original base station by about 50% (see fig. 1).

Fig. 1 2.4G base station with one 2.4G Repeater

The 2.4G Repeater utilises traffic channels of the 2.4G main base station. Thus the total number of

traffic channels is neither increased nor reduced with the 2.4G Repeater. However, each Repeater can

only handle two active voice calls.

When an active 2.4G handset moves from area 1 to area 2, the 2.4G base will HOLD the active

traffic channel. When the 2.4G handset has linked to the Repeater in area 2, the 2.4G base will

ring/call back to the handset. After answering the call, the handset can be moved around in area 2.

When the active 2.4G handset is moved back to area 1 and outside the coverage of the Repeater,

the 2.4G base will again HOLD the active traffic channel and ring/call back the handset when the

link to the main base is established in area 1, and thus there is semi-handover between the Repeater

and the 2.4G base station.

Positioning of 2.4G Repeaters and the main base station (WMC).

The 2.4G base station should be installed at the center of multiple 2.4G Repeaters (see fig. 2).

If the active 2.4G handset wants to move from area 1 to area 3, the 2.4G handset must pass

through area 2 in which the 2.4G main base station takes over the active traffic channel and

passes it to the 2.4G Repeater in area 3.

Fig. 2. 2.4G base station supplemented by four Repeaters.