NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 1
1080-100D
Issue C
bhibhi
bhibhi
bhi
NEIS-RM
Noise Eliminating Intercom System
Installation
and
Operating Manual
Remote Microphone Version
Page 20
bhibhi
bhibhi
bhi
DSP noise cancellation product s
DSP Noise Cancellation
bhi Ltd
PO Box 318
Burgess Hill
West Sussex
RH15 9NR
England
tel: +44 (0)845 217 9926
fax: +44 (0)845 217 9936
sales@bhi-ltd.com
www.bhi-lt d.com
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 2
Important Information
Copyright
This publication, including all photographs and
illustrations is protected under international copyright
laws, with all rights reserved. Neither this manual, nor
any of the material within, may be copied or reproduced
without the written consent of bhi Ltd.
Disclaimer
The information in this document is subject to change
without notice. bhi Ltd. makes no representations or
warranties with respect to the contents hereof and
specifically disclaims any implied warranties of
merchantability or fitness for any particular purpose.
Furthermore, bhi Ltd. reserves the right to revise this
publication and to make changes from time to time in
the content hereof without obligation of bhi Ltd. to notify
any person of such revision or changes.
Page 19
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NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 3
Packing List:
Please check the contents of the box.
• Operating manual
• NEIS-PSU - Medical power supply with worldwide adapters
• NEIS-MIC - Remote microphone
• NEIS-DU - Desk console
• NEIS-SPKR - Loudspeaker unit
Note: We recommend that installation be carried out by qualified
personnel.
Please study this manual before attempting to install the intercom.
T o install this intercom you will need the following additional items:
• CAT5 network cable/connections (straight-through).
• Suitable fixings for mounting the loudspeaker
• Suitable tools for installation of the above
Page 18
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NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 4
1. Introduction 6
1.1 System overview 6
1.2 Features 7
2. Intercom description 8
2.1 Intercom components 8
2. 2 Intercom component description 9
2.2.1 Loudspeaker unit 9
2.2.2 Remote microphone 9
2.2.3 Desk console 9
3. Installation 11
3.1 Basic installation 11
3.2 Power supply 11
3.3 Loudspeaker mounting 11
3.4 Cable connections 12
3.5 Desk console 13
4. Operation 14
4. 1 Desk console controls 1 4
4.2 Loudspeaker controls 15
4.3 Noise cancellation level setting 1 6
Contents
Page 17
leveL noitcudeRenoT
esioNetihW
noitcudeR
1Bd4Bd9
2Bd5Bd11
3Bd6Bd31
4Bd8Bd51
5Bd61Bd71
6Bd12Bd02
7Bd52Bd42
8Bd56Bd53
Table 1. Tone and noise reduction levels.
leveL )6-5(5J )4-3(5J )2-1(5J
1nOnOnO
2nOnOffO
3nOffOnO
4nOffOffO
5ffOnOnO
6ffOnOffO
7ffOffOnO
8ffOffOffO
Table 2. Preset DSP levels using on board jumpers.
The DSP levels are set by the following combination of jumpers.
4. Operation.
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 5
Weee Statement for correct disposal of this product
(Applicable in the European Union and other European countries with
separate collection systems). This marking shown on the product or
its literature, indicates that it should not be disposed of with other
household wastes at the end of its working life. T o prevent possible
harm to the environment or human health from uncontrolled waste
disposal, please separate this from other types of wastes and recycle
it responsibly to promote the sustainable reuse of material resources.
Household users should contact either the retailer where they
purchased this product, or their local government office, for details of
where and how they can take this item for environmentally safe
recycling. Business users should contact their supplier and check the
terms and conditions of the purchase contract. This product should
not be mixed with other commercial wastes for disposal.
Page 16
4. Operation.
4.3 Noise cancellation level.
Figure 9. Bottom view of desk console.
Noise cancellation
jumper plugs
Desk console
When the jumper is placed over
the two pins the jumper is ON.
When the jumper is connected to
one pin only , or removed from the
board it is OFF . To reduce the risk
of losing the jumper it is advised
to place it on one pin when using
the OFF position.
J5 pins
ON
OFF
2
3
5 6
1
Figure 10. Jumper details.
The noise cancellation filter level is set to the optimum position (level
7). However the noise reduction may be changed to suit the specific
requirements of the installation. The unit has a choice of 8 levels of
noise reduction, these are set by 3 jumper plugs accessible from the
bottom of the desk unit, underneath the serial number label. The
jumpers can be changed using a small pair of snipe nosed pliers or
similar tool
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 6
1. Introduction.
1. Introduction.
1.1 System overview:
The bhi NEIS Noise Eliminating Intercom System enables clear voice
communications from within noisy environments. Using unique Digital
Signal Processing (DSP) technology, unwanted noise and
interference picked up by the microphone in the communication can
be removed from the signal to leave clear intelligible speech.
The NEIS is suit able in a wide range of noisy applications, where
the sounds of fans, motors, engines, air-conditioning, traffic etc.,
give rise to poor voice communications. The system is particularly
useful for improving the voice quality in medical and industrial
environments, where noisy machines can make voice
communication difficult.
Using minimal hardware components, the installation and operation
of the bhi intercom system is very easy, connections being made
via a single cat 5 data cable. The NEIS is pre-configured for optimum
noise cancelling, and is fully adaptive to changing environmental
conditions. It is suited to a variety of applications, where clear “noise
free” two-way voice communications are important, including:
Hospital radiotherapy/radiology treatment rooms, mines, railway and
transport depots, customer help points, factories & office
communications. In fact the NEIS provides a simple effective solution
for anyone trying to communicate from within a noisy environment.
Simply plug in the power and the system is ready to go.
The NEIS consists of a stylish, robust, desktop speaker control unit,
with a “push-to-talk” button, connected to a remote “hands free”
speaker unit, with a remote microphone attached. This allows the
noisy location to be constantly monitored, an important feature for
safety critical environments.
Page 15
4. Operation.
4.2 Loudspeaker control.
Figure 8. Rear view of loudspeaker unit
The volume of the loudspeaker can be adjusted by the rear mounted
control.
Push To T alk
The desk console unit default mode is to listen to the remote speaker,
all speech at the remote speaker will be heard when the unit is
switch on. Press and hold the Push-to-talk (ptt) switch to enable
communication to the remote speaker, release the button to hear a
response back from the user.
Remote Privacy
For privacy at the remote speaker end, turn the system off using
the Volume ON / OFF control on the desk console unit.
Note: Using this function will mean that the user will no longer be
monitored.
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 7
1. Introduction.
1.2 Features:
Up to 98% noise reduction
Clear two-way voice communications
Superb audio quality using bespoke audio circuits
Easy to install modular system
Simple connection via single cat 5 computer cable
Stylish desktop speaker console with “push to talk” function
Robust speaker unit with remote microphone & separate
volume control
Noise filter Monitor switch
On/off volume control switch
Medical power supply 12 VDC (1.25A)
Dims (WxDxH) Speaker unit 180 x 160 x 240mm
Dims (WxDxH) Control unit 150 x 220 x 70mm
Page 14
4. Operation
4. Operation.
4.1 Desk console controls.
Figure 7. Rear view of desk unit
Power on/off
volume control
Noise cancellation
on/off switch
CAT 5 Loudspeaker
connector
Power
connector
Power On Off
Ensure the power supply is plugged in at the wall socket and the
wall socket is turned on. Using the on/off Volume control knob on
the rear of the desk unit, turn on the unit.
Noise Cancellation
The desk unit is pre-set for optimum noise reduction and adjustment
is not normally necessary. The noise cancellation switch on the rear
of the unit can be used to momentarily disable the noise cancellation
system, hold the switch up in the off position and all noise will be
heard from the remote speaker. Release the switch and the noise
will be removed. Adjust the volume control for a comfortable listening
level.
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 8
2. Intercom description.
2. Intercom description.
2.1 Intercom components.
Figure 1. Intercom components.
Loudspeaker unit
Desk console
DC power supply
The NEIS consists of the following components:
Loudspeaker unit
Desk console
Power supply
Remote microphone
Page 13
3.5 Desk console.
Site the desk console unit in the quiet area. Connect the other end
of the CAT5 cable to the loudspeaker socket, and the power
supply into the power connector.
CAT5 cable from
loudspeaker
DC power supply
Desk console
Figure 6. Desk console connections.
3. Installation.
Remote “plug-in” microphone assembly
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 9
2. Intercom description.
2.2 Intercom component description.
2.2.3 Desk console unit.
The desk console unit is best located in a quiet area (normaly the
equipment control room), and receives audio from the user in the
noisy area through its small loudspeaker. It has a push-to-talk (ptt)
button on the front to enable speech back to the user. The unit has a
power on/off switch with volume control, a separate noise filter monitor
switch on rear of the unit, a noise filter level select switch on the
bottom of the unit. This unit contains the noise cancellation
electronics to enable the removal of any noise that is present with
the voice signal. The unit connects to the cat 5 cable via the connector
on the rear of the unit.
2.2.1Loudspeaker unit.
The loudspeaker unit mounts in a suitable location in the noisy area
to give optimum voice quality to the user. The unit features a
separate volume control, enabling the speaker output volume to be
set up to suit the surrounding conditions and environment. The cat
5 cable connects at the rear of the unit.
2.2.2 Remote microphone.
The remote microphone connects to the rear of the loudspeaker
unit, and is best placed as near to the user as possible to obtain
optimum audio performance. The most common routing of the
microphone cable is through the ceiling and suspended down in-line
with the patients face and as near to their mouth as possible. It can
also be clipped inside the gantry using a standard plastic cable holder
or ty-rap.
Page 12
3.4 Cable connections.
Figure 5. CAT5 cable connections.
3. Installation.
Connections:
Connections are made using standard CAT 5 straight-through twisted
pair RJ45 cables
NEIS-DU
NEIS-SPKR
7 = White/Brown 7 = White/Brown
8 = Brown 8 = Brown
1= White/Orange
2 = Orange
3 = White/Green
4 = Green
5 = White/Blue
1= White/Orange
2 = Orange
3 = White/Green
4 = Green
5 = White/Blue
6 = Blue
6 = Blue
NEIS-RM Intercom Operating Manual
NEIS-RM Intercom Operating Manual
Page 10
3. Installation
3. Installation.
3.1 Basic installation diagram.
Desk console
Power supply
Quiet area Noisy area
Remote
Microphone
Loudspeaker
CAT5 cable
Figure 2. Basic block diagram.
Figure 3. Power supply.
Push pins onto
power supply body
3.2 Power supply.
The medical power supply used for the NEIS is a modular unit, and
consists of a modular pin unit and the power supply so as to
accommodate the different types of voltage and connections around
the world. Before the power supply can be used, plug the pin unit
supplied onto the power supply body until it clicks into place.
Page 11
3.3 Loudspeaker mounting.
Figure 4. Loudspeaker connections.
Rear of speaker unit
Close up of
connections and
controls
Volume
control
Microphone
connector
CAT5 cable
connection
Microphone
3. Installation.
Mount the wall bracket supplied with the speaker unit in a suitable
location in the noisy area, so that it optimizes the audio for the user.
The microphone and cat 5 cable should be connected at the rear of
the speaker before the speaker is secured into the bracket, and the
microphone should be mounted at least 1 metre away from the
speaker.
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