UTStarcom Korea Technologies UTS-800FSU FSU Manual

Introduction to This Manual Fixed Subscriber Unit Installation Manual

1. Introduction to This Manual

This manual contains all the information necessary to install and maintain the
Fixed Subscriber Unit (FSU).

1.1 Organization

This manual is organized to assist the installer and technician in gaining an
understanding of the Fixed Subscriber Unit in terms of the system’s physical
characteristics, installation instructions, and maintenance methods. Listed
below are descriptions of each chapter in this manual :

Introduction - Describes the contents of this manual.

General Description - Provides a high level description of the Fixed

Subscriber Unit System.

System Construction - Provides a more detailed system description of physical
characteristics.

1-1

Installation Instructions - Details all the steps necessary to install the device.

Acronyms and Abbreviations List - Provides definitions for each abbreviation

and acronym used in this manual.

Appendix A : Specifications - Lists the specifications for the FSU.

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2. General Description

The Fixed Subscriber Unit (FSU) is the radio equipment that connects to fixed
standard telephones and is located in the subscriber’s residence. FSUs consist
of a Radio Frequency (RF) interface and a telephone line interface. Together
they manage the supplied line voltage, the ringing signal, Dial Tone (DT) and
Busy Tone (BT) to the telephone, detect off-hook and on-hook states, and
dialing.

In a zone near the Radio Port (RP), the FSU uses a 4.5 dBi, omni-directional,
attached antenna. In zones far from the RP, the FSU uses a 10 dBi,
directional, Yagi type, attached antenna. In mid-range zones, the FSU uses a 7
dBi omni-directional antenna. The telephone line interface consists of a
BRSH (Battery supply, Ringing Supervision, Hybrid) circuit, service tone
generator, DTMF receiver, and ADPCM CODEC.

The number of fixed standard connected telephones from the same battery
supply circuit is three. The power of FSU is fed from the external DC power
generated by AC adapter.

2-3

Figure 2-1 shows the FSU in the Airstar-WLL system architecture.

…..

…..

…..

Personal

Station

Fixed

Ssubscriber

Air Interface
RCR STD-28

Unit

…..

…..

…..

Personal

Station

Fixed

Ssubscriber

Unit

Modem

Modem

Central

Office

Terminal

4 E1s

Copper Pair
Up to 5Km

Radio

Port

Controller

Copper Pair
Up to 5Km

Indoor RP

Distribution

Main

Frame

Up to 32

Outdoor RP

Phone

FAX

Computer

Phone

FAX

Computer

Figure 2-1 : Overview of FSU in Airstar-WLL System

The following sections describe the air interface call handling procedures for
outgoing and incoming calls. In addition, brief descriptions of the

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authentication, hooking signal transmission, and meter pulsing signal
transmission functions are provided.

2.1 Outgoing calls

The call handling procedure for an outgoing call is depicted in Figure 2-2 and
is described following the figure. A terminal on an FSU sends dialing
information with standard in-band DTMF tones after recognizing dial tone.

5

CO COT

Switch

MDF

Figure 2-2 : Outgoing Call

1. When the fixed standard telephone connected to the FSU

4

3

RP

1

2

RPC

MDF

FSU

RP

3

goes off-hook, the FSU detects the off-hook state, seizes
the radio link to the RP, and generates a signal to the
standard telephone. If all radio channels are occupied, a
Busy Tone is heard. Otherwise the FSU stores the dial code
from the standard telephone, converts the outgoing message
with the telephone’s number of Personal Handyphone
System (PHS) protocol, and transmits the message to the
RP.

2. The RP receives the message from that FSU through the
radio link.

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3. The RP resends the received message to the Radio Port
Controller (RPC) through the twisted pair wires via the
Main Distribution Frame (MDF).

4. The RPC converts the PHS protocol message to a Q.931
protocol message. In addition, the RPC extracts the dial
code from the outgoing message, and changes it to DTMF
signals. The Q.931 message is sent to the COT through the
D-channel of the E1 line.

5. When the COT receives the outgoing message, it converts
that message, selects and seizes the corresponding analog
line interface to the CO, and returns the seized message to
the RPC. The RPC sends the DTMF dialing signals to the
CO Switch through the voice path via the MDF. After
dialing, the RPC and RP connect all voice paths between
the CO Switch and the FSU connected to the outgoing
standard telephone. The destination telephone rings and is
picked up, and the outgoing call is put through. A voice
path is now established between the 2 telephones.

2-5

2.2 Incoming Call

The call handling procedure for an incoming call is depicted in Figure 2-3 and
is described following the figure.

1

CO COT

Switch

MDF

2

RPC

3

MDF

3

RP

RP

4

5

FSU

Figure 2-3 : Incoming Calls

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1. A specific analog line is rung in the CO. The signal is sent
to the COT via the MDF.

2. The COT detects the ringing of the line and sends the
incoming message with the Q.931 calling number to the
RPC.

3. When the RPC receives the incoming message from the
COT, the RPC converts that Q.931 message to the PHS
incoming message protocol and sends it through the MDF
to all of the RPs.

4. The RPs page all FSUs and PSs. When the corresponding
FSU number receives the paging message from the RP, it
rings the connected telephone.

5. If the ringing telephone is lifted off-hook, an off-hook
message is sent to the CO switch through the RP, RPC and
COT. Speech paths are established between the connected
telephones.

NOTE : If a call is received while dialing out, the incoming call has priority. In the

case of overlap sending, only DTMF dialing is availaable and DP is not
supported.

2.3 Authentication

Authentication is a function that prevents the unauthorized use of a
subscriber’s telephone number. The authentication procedure is performed
during Outgoing Calls, Incoming Calls and Location Registration. At
subscription time each FSU is configured with a unique authentication key and
telephone number. The COT is also configured with the telephone numbers
and authentication keys for all FSUs within its management database. After
receiving an authentication key code from the COT, the RPC:

1. Generates a random authentication pattern and sends it to
the FSU.

2. Receives the calculation result from the FSU.

3. Checks the result and sends both the calculation and check
result to the COT.

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COT RPC FSU

Facility
(Authentication Required (Key)) Authentication Req

Authentication Req

2-7

Facility
(Authentication Result)

Figure 2-4 : Authentication

2.4 Hooking Signal Transmission

The hooking signal transmission function relays the hooking signal message
from an FSU to a COT. The COT generates a hooking signal according to the
message.

Authentication
operation
(calculation

and check)

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3. System Construction

The Fixed Subscriber Unit, as shown in Figure 3-1, has the following
dimensions:

• Length : 130mm

• Width : 175mm

• Depth : 40mm

Starcom

UT

3-9

MONITOR

POWER

Figure 3-1 : FSU - Main Unit

Refer to Appendix A for FSU specifications.

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Fixed Subscriber Unit Installation Manual Installation Instructions

4. Installation Instructions

This section provides instructions for installing an FSU. The flow-chart in
Figure 4-1 defines the steps involved in an installation.

Begin

Install Antenna

Preparation

Install Coaxial

Choose Antenna

Location

Cable

4-11

Figure 4-1 : FSU Installation Flow Chart

4.1 Before Beginning

To ensure that the FSU installation goes smoothly, it is necessary to do
adequate planning prior to the installation. Things to consider:

Choose Main

Unit Location

Gather Accessories

and Tools

Configure

FSU

• Configuration of FSU

• Configuration of COT

Install Main Unit

Adjust Antenna

End

• Placement of the Main Unit and the Antenna

• Accessories, Standard and Special Tools required

• Number of people needed to complete an installation.

An FSU installation is accomplished in two parts : the Main Unit that is
installed indoors and the Antenna that is installed outdoors.

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