Automatic Telephone Hybrid
User Handbook
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HY-03 User Handbook
This handbook is for use with the following products :
HY-03 Automatic analogue TBU with ringing detector, free standing
HY-03 (US) Automatic analogue TBU with ringing detector, free standing US Version
HY-03S Automatic analogue TBU with ringing detector, 19” rack mounted
HY-03S (US) Automatic analogue TBU with ringing detector, 19” rack mounted US Version
HY-03T Twin automatic analogue TBU with ringing detector, 19” rack mounted
HY-03T (US) Twin automatic analogue TBU with ringing detector, 19” rack mounted, US Version
HY-03DTD Dial tone detect add-on board for HY-03 range
©Sonifex Ltd, 2008 - 2011
All Rights Reserved
Revision 1.07, May 2011
Sonifex Ltd, 61, Station Road, Irthlingborough,
Northants, NN9 5QE, England.
Tel: +44 (0)1933 650 700
Fax: +44 (0)1933 650 726
Email: sales@sonifex.co.uk
Website: http://www.sonifex.co.uk
Information in this document is subject to change without notice and does not represent a commitment on the part of the
vendor. Sonifex Ltd shall not be liable for any loss or damage whatsoever arising from the use of information or any error
contained in this manual.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including
photocopying, recording, information storage and retrieval systems, for any purpose other than the purchaser’s personal
use, without the express written permission of Sonifex Ltd. Unless otherwise noted, all names of companies, products
and persons contained herein are part of a completely ctitious adaptation and are designed solely to document the use of
Sonifex product.
HY-03 USER HANDBOOK
HY-03 USER HANDBOOK
HY-03 User Handbook
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CONTENTS
CONTENTS
Contents
Warranty And Safety Information i
Warranty and Liability i
Unpacking the HY-03 iii
Returning the Warranty Card iii
Safety of Mains Operated Equipment iv
Voltage Setting Checks iv
Fuse Rating iv
Power Cable and Connection v
Opening the HY-03 v
Ordering the Correct Mains Lead vi
Installation Information vi
Atmosphere vi
Electromagnetic Radiation vi
WEEE & RoHS Directives - Sonifex Statement vii
Reporting Faults viii
Introduction 1
What is a Telephone Hybrid ? 2
Integrated Ringing Detector 2
Available Formats 2
Installing the HY-03 TBU 3
Using the HY-03 5
Receiving a Call 5
Making a Call 5
FAQ (Frequently Asked Questions) 5
Conguration & Controls 7
Front Panel Controls 7
Power LED Indicator 7
Line Connect Switch 7
Rear Panel Controls 7
Adjusting the Output Level 7
Adjusting the Microphone Gain Level 8
Mic/Line Input Select Switch 8
Remote Mode Select Switch 8
Conguration Settings Switches 8
Dial Tone Disconnect Enable - SW1 8
K-Break Disconnect Enable - SW2 and JP4 8
Line Polarity Reversal Disconnect Enable - SW2 and JPS 9
Input/Output Mix Enable - SW3 9
Ring Detector (Auto Answer) Enable - SW4 9
Mains Voltage Selector Switch 9
HY-03 Internal Controls & Adjustments 10
Setting the Number of Rings for The Ringing Detector 10
Switching the Noise Gate On/O 10
Adjusting the Noise Gate Threshold 10
Using the Dial Tone Disconnect Option 11
Technical Specication 14
HY-03 Connection Details 14
Line Output 14
Mic/Line Input 14
Remotes 14
Telephone Handset 15
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HY-03 User Handbook
CONTENTS
CONTENTS
Telephone Line 15
Mains Input 15
Protective Earth Terminal 15
Technical Specication 16
Physical Specication 16
Accessories 17
Approvals Information 17
Manufacturer 17
Equipment Type 17
BABT Approval Numbers 17
Functions 17
Specied Systems 17
Ringer Equivalence Number 18
Accessory Ports 18
Conditions 18
Series Connection 18
Facilities 18
Statutory Mark 18
Figures
Table A : Packing List iii
Table B : Power Connections v
Table C : Mains Lead Table vi
Figure 1-1 : HY-03 & HY-03 US Front & Rear 2
Figure 1-2 : HY-03S & HY-03S US Front & Rear 3
Figure 1-3 : HY-03T & HY-03T US Front & Rear 3
Figure 1-4 : HY-03 User Connections 3
Figure 2-1 : Front Panel Controls 7
Figure 2-2 : Rear Panel Controls 7
Figure 2-3 : Conguration Settings Switches 8
Figure 2-4 : HY-03 Preset Controls and Alignments 10
Figure 2-5 : Jumper Settings on the HY-03DTD Board 11
Table D : Dial Tone Disconnect Options 12
Figure 3-1 : HY-03 Rear Panel Connections 14
HY-03 User Handbook
i
Warranty
Warranty and Liability
Important: the purchaser is advised to read this clause
(a) The Company agrees to repair or (at its discretion) replace Goods which are found to
be defective (fair wear and tear excepted) and which are returned to the Company
within 12 months of the date of despatch provided that each of the following
are satised:
(i) notication of any defect is given to the Company immediately upon its
becoming apparent to the Purchaser;
(ii) the Goods have only been operated under normal operating conditions and
have only been subject to normal use (and in particular the Goods must have
been correctly connected and must not have been subject to high voltage or
to ionising radiation and must not have been used contrary to the Company’s
technical recommendations);
(iii) the Goods are returned to the Company’s premises at the Purchaser’s expense;
(iv) any Goods or parts of Goods replaced shall become the property of
the Company;
(v) no work whatsoever (other than normal and proper maintenance) has been
carried out to the Goods or any part of the Goods without the Company’s prior
written consent;
(vi) the defect has not arisen from a design made, furnished or specied by
the Purchaser;
(vii) the Goods have been assembled or incorporated into other goods only in
accordance with any instructions issued by the Company;
(viii) the defect has not arisen from a design modied by the Purchaser;
(ix) the defect has not arisen from an item manufactured by a person other than
the Company.
In respect of any item manufactured by a person other than the Company, the Purchaser
shall only be entitled to the benet of any warranty or guarantee provided by such
manufacturer to the Company.
(b) In respect of computer software supplied by the Company the Company does not
warrant that the use of the software will be uninterrupted or error free.
(c) The Company accepts liability:
WARRANTY
WARRANTY
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HY-03 User Handbook
(i) for death or personal injury to the extent that it results from the negligence of
the Company, its employees (whilst in the course of their employment) or its
agents (in the course of the agency);
(ii) for any breach by the Company of any statutory undertaking as to title, quiet
possession and freedom from encumbrance.
(d) Subject to conditions (a) and (c) from the time of despatch of the Goods from the
Company’s premises the Purchaser shall be responsible for any defect in the Goods
or loss, damage, nuisance or interference whatsoever consequential economic or
otherwise or wastage of material resulting from or caused by or to the Goods. In
particular the Company shall not be liable for any loss of prots or other economic
losses. The Company accordingly excludes all liability for
the same.
(e) At the request and expense of the Purchaser the Company will test the Goods to
ascertain performance levels and provide a report of the results of that test. The
report will be accurate at the time of the test, to the best of the belief and knowledge
of the Company, and the Company accepts no liability in respect of its accuracy
beyond that set out in Condition (a).
(f) Subject to Condition (e) no representation, condition, warranty or other term, express
or implied (by statute or otherwise) is given by the Company that the Goods are of
any particular quality or standard or will enable the Purchaser to attain any particular
performance or result, or will be suitable for any particular purpose or use under
specic conditions or will provide any particular capacity, notwithstanding that the
requirement for such performance, result or capacity or that such particular purpose
or conditions may have been known (or ought to have been known) to the Company,
its employees or agents.
(g) (i) To the extent that the Company is held legally liable to the Purchaser for any
single breach of contract, tort, representation or other act or default, the
Company’s liability for the same shall not exceed the Price of the Goods.
(ii) The restriction of liability in Condition (g)(i) shall not apply to any liability
accepted by the Seller in Condition (c).
(h) Where the Goods are sold under a consumer transaction (as dened by the Consumer
Transactions (Restrictions on Statements) Order 1976) the statutory rights of the
Purchaser are not aected by these Conditions of Sale.
WARRANTY
WARRANTY
HY-03 User Handbook
iii
Unpacking the HY-03
The HY-03 is shipped with the following equipment. Please check your packaging to ensure
that you have all of the items below. If anything is missing, please contact the supplier of
your equipment immediately.
Item Quantity Quantity
HY-03 & HY-03S HY-03T
HY-03 automatic telephone hybrid 1 2
Telephone line lead (RJ11 to RJ11) 1 2
Telephone line lead (RJ11 to BT plug) 1 2
Telephone line lead adapter
(BT socket to RJ11 plug) 1 2
IEC Mains lead tted with moulded
mains plug 1 2
Handbook and warranty card 1 1
Table A : Packing List.
Each HY-03 is shipped in protective packaging and should be inspected for damage before
use. Where an item is found to have transit damage, notify the carrier immediately with all
the relevant details of the shipment. Packing materials should be kept for inspection and
also for if the product needs to be returned.
Returning the Warranty Card
In order to register the date of purchase so that we can keep you informed of any design
improvements or modications, it is important to complete the warranty registration
document that is enclosed and return it to Sonifex Ltd in the UK, or register online at
www.sonifex.co.uk/register
For your own records you should write down the serial number (which can be found on the
rear of the HY-03).
Serial Number ………………………………………
WARRANTY
WARRANTY
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HY-03 User Handbook
Safety Information
Safety of Mains Operated Equipment
This equipment has been designed to meet the safety regulations currently advised
in the country of purchase and it conforms to the safety regulations specied by
use of the CE Mark.
Warning : There are no user serviceable parts inside the equipment. If you should ever
need to look inside the unit, always disconnect the mains supply before removing the
equipment covers.
Warning: The HY-03 line socket should only be connected with apparatus
complying with BS6301, and the connection to the network must not be hard wired
Interconnection directly or indirectly with equipment ports marked in accordance with
BS6301 to unmarked ports may produce hazardous conditions on the network and
advice should be obtained from a competent engineer before such a connection is made.
Warning: This apparatus must be earthed by means of the earth connector on the rear
panel, and the connection to the telecommunications network should be removed
before disconnecting the earth. Disconnection of this earth connection may render the
equipment unsafe, with a consequential possible electrical shock hazard from exposed
metallic parts.
Warning: The barriered ports ‘LINE’ and ‘HANDSET’ must not be connected directly or
indirectly to the un-barriered ports, ‘MIC/LINE INPUT’, ‘OUTPUT’ or ‘REMOTES’.
Voltage Setting Checks
The mains input voltage selector switch on the rear panel of the equipment sets the
operating voltage of the HY-03 to be either 115V or 230V. Ensure that the machine
operating voltage is correct for your mains power supply. The safety specication of your
HY-03 complies with local requirements and must be earthed through the mains connector.
Fuse Rating
The HY-03 is supplied with a single fuse in the live conducting path of the mains power
input. For reasons of safety it is important that the correct rating and type of fuse is
used. Incorrectly rated fuses could present a possible re hazard, under equipment fault
conditions. The fuse ratings for the HY-03 are:
115V operation: 200mA 5 x 20mm SB
230V operation: 100mA 5 x 20mm SB
The active fuse is tted on the outside rear panel of the unit. If you change the voltage of
the HY-03, make sure to change the fuse also.
SAFETY INFORMATION
SAFETY INFORMATION
HY-03 User Handbook
v
Power Cable and Connection
An IEC power connector is supplied with the HY-03 which has a moulded plug attached
– this is a legal requirement. If no moulded plug has been supplied with your HY-03, please
contact your supplier, because an IEC connector is always supplied from the Sonifex factory.
If for any reason, you need to use the HY-03 with a dierent power cable, you should use the
following wiring guidelines
Wire Colour Connection
Green, or green and yellow Earth (E)
Blue, or Black Neutral (N)
Brown, or Red Live (L)
Table B : Power Connections.
Connect the equipment in accordance with the connection details and before applying
power to the unit, check that the machine has the correct operating voltage for your mains
power supply.
Important Note : The terminal marked on the rear panel must be earthed.
Opening the HY-03
If you need to get inside the unit to make conguration adjustments, simply remove the 4
screws in the corners of the rear panel. The rear panel and main PCB will slide backwards out
of the metal chassis.
When re-inserting the main PCB, ensure that the PCB edges are in the runners inside the
chassis and also that the front panel LED and divert button are in the correct place in the
front panel.
Warning : The power must be switched o at the supply or the power lead must be
disconnected before attempting to open the unit. Removal of the cover can expose
dangerous voltages.
Warning : The telephone line plug should be disconnected from the telecommunications
network exchange line before removing the equipment covers.
SAFETY INFORMATION
SAFETY INFORMATION
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HY-03 User Handbook
Ordering the Correct Mains Lead
When ordering a TBU from Sonifex, it is helpful if you can specify your required operating
voltage and mains lead. After the product code add:
UK, for 230V, UK 3 pin to IEC lead
EC, for 230V, European Schuko 2 pin to IEC lead
US, for 115V, 3 pin to IEC lead
AU for 230V, Australasian 3 pin to IEC lead
Table C : Mains Lead Table.
E.g. order HY-03S UK for a UK IEC lead to be supplied.
Installation Information
Atmosphere
The units should be installed in an area that is not subject to excessive temperature
variation (<0°C, >50°C), moisture, dust or vibration.
Electromagnetic Radiation
The cover is connected to earth by means of the xing screws. It is essential to maintain
this earth ground connection to ensure a safe operating environment and provide
electromagnetic shielding.
SAFETY INFORMATION
SAFETY INFORMATION
HY-03 User Handbook
vii
WEEE & RoHS Directives - Sonifex Statement
The Waste Electrical and Electronic Equipment (WEEE) Directive was agreed on
13 February 2003, along with the related Directive 2002/95/EC on Restrictions
of the use of certain Hazardous Substances in electrical and electronic
equipment (RoHS).
The Waste Electrical and Electronic Equipment Directive (WEEE) aims to minimise the
impacts of electrical and electronic equipment on the environment during their life times
and when they become waste. It applies to a huge spectrum of products. It encourages
and sets criteria for the collection, treatment, recycling and recovery of waste electrical and
electronic equipment. All products manufactured by Sonifex Ltd have the WEEE directive
label placed on the case. It gives a contact for individuals who are unsure about the correct
procedure when the product has reached its “end of use”.
Sonifex Ltd will be happy to give you information about local organisations that can
reprocess the products, or alternatively all products that have reached “end of use” can be
returned to Sonifex and will be reprocessed correctly free of charge.
Sonifex Ltd has phased out the use of certain hazardous substances identied in the
European Union’s Restriction of Hazardous Substances (RoHS) directive. The RoHS directive
limits the use of certain hazardous substances currently used in EEE manufacture, including
lead, mercury, cadmium, hexavalent chromium, and halide-containing compounds PBB
(polybrominated biphenyl) and PBDE (polybrominated diphenyl ether). Elimination of these
substances will result in more environmentally friendly recycling of electronic equipment.
For the products which Sonifex manufacture, the main area where products were aected
was in the use of lead for manufacturing and assembling electronics circuit boards.
Sonifex Ltd practices lead-free (LF) manufacturing processes. LF solder is used on the
surface-mount PCB manufacturing processes and for hand soldering. The printed circuit
boards (PCBs) used are either gold plated, or immersion tin plated, both of which use no
lead. Historically the PCBs were hot air solder levelled (HASL) PCBs which used tin/lead
based solder.
The manufacturing processes include the assembly of purchased components from various
sources. Product is oered as RoHS compliant, or LF, only after sucient evidence is received
from the component manufacturers that their components are RoHS compliant. Sonifex
Ltd relies solely on the distributor, or manufacturer, of the components for identication of
RoHS compliance. Thus whilst every eort is made to ensure compliance, Sonifex Ltd makes
no warranty, or certication, or declaration of compliance concerning said components.
Sonifex Ltd denes “Lead Free” as pertaining to any product, which has been manufactured
by Sonifex Ltd using components which have been declared by the manufacturers as
“Lead Free”. All statements by Sonifex Ltd of RoHS compliance are based on component
manufacturer documentation.
SAFETY INFORMATION
SAFETY INFORMATION
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HY-03 User Handbook
Reporting Faults
Although this Sonifex product is manufactured to the highest standards, it is possible that
minor faults may appear in the equipment over its normal lifetime. If you nd any problems
with the HY-03, please contact your Sonifex distributor, or contact Sonifex directly at the
following address, or fax with a copy of this completed sheet :
To : From:
Sonifex Ltd, Name
61, Station Road, Position
Irthlingborough, Company
Northants. Address
NN9 5QE, UK
Tel : +44 (0)1933 650 700 Tel
Fax : +44 (0)1933 650 726 Fax
Email : technical.support@sonifex.co.uk Email
For the Serial No. of your machine, see the
back panel of the HY-03 unit.
HY-03 Serial No.
Please describe the error in as much detail as possible (for example what you were doing
when the problem occurred, what actually happened, etc)
Description of HY-03 Error
Also, if you have any suggestions for additions or upgrades to the HY-03 unit , we would like
to hear what they are :
Additions that I Would Like to See
REPORTING FAULTS
REPORTING FAULTS
HY-03 User Handbook
1
1 Introduction
The HY-03 is a high quality analogue telephone hybrid, which is suitable for most general
telephony applications and is often used in radio and TV stations, bingo halls and dealing
oors. The analogue HY-03 telephone hybrid is the replacement for the HY-02, which for
many years has set the standard as an excellent value, high quality telephone hybrid.
The HY-03 can be used for any application where a clean telephone signal is required and
the line is not subject to delay. The HY-03 retains many of the features of the HY-02 and adds
some additional ones. Some of the features of the HY-03 include:
• Fullyautomatic–adaptstovaryinglineconditionsandhasautomaticsignallimiting.
• Localandremotelineholdswitching–callscanberemotelyswitchedthrougha
mixing console.
• Momentaryorpermanentlatchingremotescanbeenabled.
• Balancedmic/lineinput–10kΩbalancedinputselectablefor0dBucleanfeedline,or
microphone level with adjustable gain.
• Balancedoutput–0dBulowimpedancebalancedoutput,withoutputgainadjustment.
• Mixedoutput–theoutputcanbeamixofthecallerandmic/lineinputsignalsfor
recording both sides of the telephone conversation.
• Integratedringdetector–automaticcallansweringafterapre-determinednumber
of rings.
• FittedwithK-breakdisconnect(linepolarityreversalintheUS)detectionasstandard
with an option for dial-tone disconnect (HY-03DTD option).
• Linelimiter,bandpasslterandoutputnoisegatewithpresetthresholdprovidinglow
distortion crystal clear audio.
• 45dBtypicallinebalancerejectionontone,28dBoncomplexwaveforms.
• Builtinpowersupplywithswitchable115V,or230V,mainsinput.
• BABTapprovalcompliantwithEuropeanPTTspecications.
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HY-03 User Handbook
What is a Telephone Hybrid?
Telephone hybrids (or telephone balance units, TBUs) provide the interface between
professional audio equipment and the public telephone network. They provide protection
for your equipment and the public telephone lines, allowing for varying line signals and line
conditions. Automatically canceling out the unwanted signal they also facilitate two-way
communication down a single telephone line, converting the two-wire telephone signal to a
four-wire send and return signal to be linked to a studio mixer, for example.
The hybrid has a telephone line connection and separate terminals for audio input and
output from a broadcast mixer, or other professional audio source.
A large proportion of Sonifex hybrids are used in radio and television broadcasting
applications for allowing external callers to be connected to the studio mixing console.
Most of the other units are supplied to communication operations for allowing extremely
eective conversion between four-wire audio circuits and standard telephone lines.
Built to a very high specication, the HY-03 is simple to install and automatically adapts to
line conditions and programme content.
Integrated Ringing Detector
Ringing detectors can be used when you need to answer a call automatically, for instance,
if a journalist les a report to a tape recorder over a telephone line, the call can be picked
up after a set number of rings by the ringing detector. The HY-03 has a built in ring detector
that is enabled by one of the conguration settings switches on the rear panel.
Available Formats
The HY-03 analogue telephone hybrids are available in three dierent formats, each with its
own approved, internal power supply :
HY-03 & HY-03 US Automatic analogue TBU with ringing detector, free standing
Figure 1-1 : HY-03 & HY-03 US Front & Rear
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HY-03 User Handbook
3
HY-03S & HY-03S US Automatic analogue TBU with ringing detector, 1U 19” rack mounted
Figure 1-2 : HY-03S & HY-03S US Front & Rear
HY-03T & HY-03T US Twin automatic analogue TBU with ringing detector, 1U 19”
rack mounted
Figure 1-3 : HY-03T & HY-03T US Front & Rear
Installing the HY-03 TBU
Connect the earth and mains power connections as per the information given in the
Warranty and Safety Information section of the handbook, and ensure that the mains input
voltage selection switch is in the correct position. The hybrid unit should be connected with
reference to Figure 1-4.
Figure 1-4 : HY-03 User Connections
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HY- 03
Mixing Desk
T e lephone
Line
Handset
Microphone
Earth
Remote
Divert
Mains
Power
Inputs to
T e lephone
Channel
Outputs from
Mixer
Clean-Feed
Output
Mic/Line Input
Remotes
Handset
Line
Earth
Power
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HY-03 User Handbook
The telephone line socket is connected to the telephone network using the cable provided
(either RJ11 to RJ11, or RJ11 to BT plug).
A simple telephone handset can be used to take and make calls when plugged into the
equipment handset connector. An adapter is provided if the handset is tted with a BT plug
as standard.
A remote switch may be connected at the Remotes socket in order to control the line
connect switch from say, the telco channel of a mixing desk.
Connect the output from the mixing desk “clean-feed” to the mic/line input of the HY-03,
with the mic/line input select switch set to “line input”. A clean-feed is a signal produced
by a telco module on a mixer which is used as the output to be fed back to a caller on
a telephone line. The cleanfeed is a sum of all the other signals which constitute the
programme output, except for the caller’s audio (this is so that the caller doesn’t hear
him/herself in the ear-piece). A cleanfeed signal will generally be of a better quality than a
mix-minus signal.
The characteristics of the mic/line input are determined by the state of the mic/line
conguration selection switch. It is a balanced bridging input and in line mode will accept
normal signals at 0dBu peaking to +8dBu from a sound mixer clean -feed. In mic mode
the unit will accept 200 ohm microphone level signals with a maximum gain of 74dB. It is
suitable for a wide range of microphones and the available gain is 74dB to 40dB, which can
be adjusted by the mic level pre-set mounted on the rear panel
The input circuitry to the HY-03 has a very eective limiter, which will prevent high level
overloading problems. Ideally, the maximum input level should not exceed +12dBu. This
limiter is used for both line and mic input modes.
The output connection will deliver a balanced/oating low impedance signal of 0dBm from
the telephone line. The output of the analogue hybrid unit is normally 0dBu from a balanced
source of 50 ohms or less across the useful bandwidth of the equipment. The bandwidth
is restricted by the line conditions between 250 Hz and 4 kHz. The output stage is capable
of driving into 600 ohm loads at up to +8dBu. Termination of the output is not necessary
however and direct connection can be made into the mixer telephone return channel.
The output stage has a gain pre-set control, mounted on the rear panel, which may be
set to give 0dB signals at the output. In addition an output noise gate operates when the
telephone signal is below the noise gate threshold control. This noise gate reduces the
output gain by 34dB under no signal conditions eliminating the aects of telephone line
cross talk. The noise gate is factory set to –26dBu to avoid interaction with the equipment
null.
Isolation of better than 28dB is created between the input and output connectors when the
hybrid unit is functioning on an exchange line.
Note : The earth bond at the screw terminal must be connected to a technical earth to
ensure the safe operation of the equipment under all line conditions.
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HY-03 User Handbook
5
Using the HY-03
Receiving a Call
With the equipment connected as in Figure 1-4 calls may be received and detected by the
ringer in the telephone handset. To receive the call, lift the handset and establish contact
with the caller. The call may be diverted to the telephone hybrid by pressing either the front
panel mounted line connect switch or by means of the remote divert switch (if connected).
Alternatively, the incoming calls can be answered automatically by enabling the integrated
ringing detector. It is recommended that the K-break line clearance is used when the ringing
detector is enabled. When the ringing detector is in use, ringing tone will illuminate the
line connect switch. The line connect switch lamp is o in the non-connected mode and
illuminated in the connected mode.
Note : The remote lamp tally mimics the front panel line connect switch lamp, i.e. it
ashes when ringing and is on when the line is held.
The hybrid unit will now behave as a 4 wire to 2 wire converter with signal inputs at the
mic/line Input connector and telephone signal output at the output connector.
The call may be cleared by repressing the line connect switch or by means of the remote
divert switch. The call can also be cleared automatically by enabling either the K-break
disconnect or the dial tone disconnect (using the optional HY-03DTD dial tone disconnect
plug-in PCB).
With both auto-answer and auto-clearance in use, call handling can be completely
automatic in operation.
Making a Call
To initiate a call, lift the handset and dial the required telephone number. When the call
has been established, press the line connect switch and the call will be handed over to the
telephone hybrid unit. To clear the line at the end of the call, press the line connect switch.
The line connect switch lamp is o in the non-connected mode and illuminated in the
connected mode.
FAQ (Frequently Asked Questions)
The answers to most of the following questions are available elsewhere in the handbook,
but have been summarised here for convenience.
Q: What are the remote connection details for these units ?
A: The remote connector is a 9-way female (socket) ‘D’ type. To remotely divert, connect pin
1 to pin 2. Pin 3 supplies +15V with reference to pin 4. The remotes can act as momentary or
latching depending on the setting on the rear panel of the unit:
Pin 1 : Divert switch (Line Connect)
Pin 2 : Common
Pin 3 : Lamp
Pin 4 : Common
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HY-03 User Handbook
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Q: What type of remote lamp will the HY-03 drive?
A: The remote lamp type should be 15V at 40mA max. When connecting any loads the
current should be limited to this value using a series resistor. For example a 390 ohm
resistor would limit the current to 38mA.
To connect/disconnect the unit pins 1 and 2 should be connected together via a
contact closure or equivalent. Care should be taken that pin 3 is not connected to pins
1 or 2 and that incompatible external signals are not used. Incorrect conguration can
result in the failure of the connect/disconnect transistor and protection diode which
leaves the unit permanently latched in a connected state and therefore unusable.
As this fault is caused by using the unit outside of its recommended operating conditions it
will not be covered under warranty.
Q: What is the power consumption of the HY-03 telephone hybrid?
A: <6W for HY-03 and HY-03S.
Q: What functions are controlled by the conguration settings switches on the rear panel of
the HY-03 telephone hybrid?
A: SW1 – Dial Tone Disconnect Enable.
SW2 – K-Break Disconnect Enable.
SW3 – Input/Output Mix Enable.
SW4 – Ring Detector (Auto-Answer) Enable.
Q: The telephone hybrids don’t automatically disconnect on dial-tone. Why not ?
A: Whilst the HY-03 does include K-break disconnection (for the UK) and line polarity
reversal (for the US), these do not use the dial tone to disconnect. There is no dial tone
disconnection unless the HY-03DTD dial tone detect option has been added.
If the HY-03DTD option has been added and you still have this problem, then ensure that
conguration switch SW1 is set to on. Also, ensure that the HY-03DTD option is of the
correct type for your network connection. See the Dial Tone Disconnect section later in
this handbook.
Q: The telephone hybrid unit keeps “dropping the line”. How can I stop this happening?
A: Firstly, try disabling the k-break function of the hybrid – set the SETTINGS switch SW2
to o. If you still have a problem once the k-break is disconnected, please contact Sonifex
technical support (technical.support@sonifex.co.uk)
Q: The signal input to the HY-03 at the input connector, is audible at the output. Why is
this happening ?
A: There is an option on the HY-03 which enables the input signal to be mixed with the
output. Ensure the SETTINGS switch SW3 is set to o to disable this option.
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2
Conguration & Controls
Front Panel Controls
Figure 2-1: Front Panel Controls
Power LED Indicator
The power LED indicates that the equipment is powered and operational when illuminated.
Line Connect Switch
This is the front panel button used to connect calls to, and disconnect calls from, the
telephone line. The switch will illuminate to indicate the call has been connected. If the
integrated ring detector is enabled, the line connect switch will ash when an incoming call
is detected. Operation of this switch can be remotely controlled.
Rear Panel Controls
Figure 2-2 : Rear Panel Controls
Adjusting the Output Level
The Output Level Preset Pot controls the level of the output signal. Use a jeweller’s
screwdriver to adjust the gain of the output stage by +8dB to –14dB to give 0dB signals at
the output.
Power LED Indicator Line Connect Switch
Output Level
Preset Pot
Mic Level
Preset Pot
Mic/Line Input
Select Switch
Remote Mode
Select Switch
Conguration
Setting Switches
Mains Voltage
Selector Switch
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2
Adjusting the Microphone Gain Level
The Mic Level Preset Pot controls the level of the input signal when the input signal mode
is set to Mic. The input signal level in Line mode is factory set and is not aected by this
control. The Mic Input will accept 200 ohm microphone level signals and is balanced/
oating with a maximum gain of 74dB. Use a jeweller’s screwdriver to adjust the gain
between 74dB and 40dB.
Mic/Line Input Select Switch
This push-button switch sets the input signal mode :
Switch depressed (down) - Mic input mode selected
Switch not depressed (up) - Line input mode selected
Remote Mode Select Switch
This switch determines the operation of the remote line connect switch, if connected:
Switch depressed (down) - Permanent (latching) mode selected
Switch not depressed (up) - Momentary mode selected
Conguration Settings Switches
These switches are used to congure the HY-03 in the modes that you want it to operate.
A label on the top panel of the unit shows the orientation of the switches :
Figure 2-3 : Conguration Settings Switches
Dial Tone Disconnect Enable - SW1
When enabled (ON), the HY-03 will automatically disconnect from the telephone line when
an appropriate dial tone is detected. See “Using the Dial Tone Disconnect option” later in
this section.
Note : This feature is an optional extra and requires an additional plug-in PCB to be tted.
Please contact Sonifex for further information and pricing on the HY-03DTD board.
K-Break Disconnect Enable - SW2 and JP4
When SW2 is enabled (ON) (and for serial number HY-03 units after HY000323 when JP4
is on), the HY-03 will automatically disconnect from the telephone line by detecting the
K-break. The K-break signal only operates in the UK and is available on nearly all electromechanical exchange systems. The signal consists of a momentary disconnection or
signicant reduction in current (to below 1mA) lasting from about 1ms to 100ms (modern
HY-03 SETTINGS
DIAL TONE DISCONNECT
ENABLE
RING DETECTOR ENABLE
INPUT / OUTPUT MIX ENABLE
4
4
2
2
1
1
3
3
ON
OFF
ON
ON
ON
ON
K-BREAK DISCONNECT
ENABLE
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CONFIGURATION & CONTROLS
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2
design exchange systems are designed to have a K-break signal lasting 50ms). British
Telecommunications plc may, in some situations where no end of call signal is available, be
able to provide one at the request of a UK customer.
Line Polarity Reversal Disconnect Enable - SW2 and JP5
When SW2 is enabled (ON) (and for serial number HY-03 units after HY000323 when JP5
is on), the HY-03 will automatically disconnect from the telephone line by detecting the
line polarity reversal. Line polarity reversal operates in the US and Canada and consists of a
momentary reversal of the line polarity. Once a call is completed, polarity reversal happens
on the line 3 times, each separated by a 10 second gap.
Input/Output Mix Enable - SW3
When this switch is enabled (ON), the HY-03 output signal will be an equal mix of the normal
output signal and the selected input signal, either Mic or Line. This is useful if, for example,
you want to use the HY-03 output to record both sides of the conversation.
Ring Detector (Auto Answer) Enable - SW4
This switch enables the integrated ring detector, which automatically answers incoming
calls after a predetermined number of rings. The ringing detector circuits are on-line before
and during the ringing cadence and are switched o-line during call holding.
Mains Voltage Selector Switch
This is used to congure the HY-03 operating voltage as either 115V, or 230V. The switch is
recessed so that it can not be accidentally altered.
Note : The fuse will need to be changed if you alter the voltage settings.
10
HY-03 User Handbook
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2
HY-03 Internal Controls & Adjustments
See page v for information on opening the HY-03
Figure 2-4 : HY-03 Preset Controls and Alignments
Setting the Number of Rings for The Ringing Detector
To alter the number of rings that occur before the ringing detector auto answers the call,
use a jeweller’s screwdriver to adjust RV8. The equipment is factory set for 3 rings, but this
can be adjusted between 1 and 6 rings.
Note : The number of rings above are for UK ring tones and may vary for non-UK
telephone exchanges.
Switching the Noise Gate On/O
An output noise gate operates when the telephone signal is below the noise gate threshold
control. This noise gate reduces the output gain by 34dB under no signal conditions
eliminating the aects of telephone line cross talk. The noise gate can be switched o if you
don’t wish to use it by adding JP1 on the main circuit board.
JP1 ON – Noise Gate O
JP1 OFF – Noise Gate On
Adjusting the Noise Gate Threshold
The noise gate is factory set to –26dBu to avoid interaction with the equipment null. To
adjust the noise gate threshold, use a jeweller’s screwdriver to adjust RV4 on the main HY-03
circuit board.
Mic Gain
Limit Level
Noise Gate
Disable
Res Auto
Disable
Line
Reverse
K-Break
Cap Auto
Disable
Noise Gate
Threshold
Optional
HY-03DTD
Board
On units serial number
HY000323 upwards
Plug-in
Header
Mounting screw
on a pillar
Output
Level
Sample
Threshold
Rings
Res Set
Cap Set
RV4
RV7
RV2
JP1
JP4
JP5
JP1JP16
JP2 JP3
RV6
RV5
RV8
RV3 RV1
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2
Note : The noise gate threshold is factory set for optimum performance, so will not
normally need adjustment.
Important Note : There are a number of other controls which are factory set, or should
only be used when testing/aligning the product. These are RV2, RV5, RV6, RV7 and
jumpers JP2 and JP3. Please note that these controls should not be adjusted in normal
operation and could damage the performance of your product if altered. Adjusting these
settings will invalidate the warranty on your product.
Using the Dial Tone Disconnect Option
The optional HY-03DTD Dial Tone Disconnect PCB allows the HY-03 to drop a call
automatically when the pre-congured tones are detected.
To use Dial Tone Disconnect, SW1 on the rear panel
must be set to on, and the appropriate jumper(s)
JP1-JP16 on the Dial Tone Disconnect PCB must be
tted to enable detection of the required tone(s).
For example, to enable the HY-03 to detect the dial
tone in Finland, set the rear panel SW1 to ON and
set the jumpers on the HY-03DTD board over JP1,
JP2 and JP3.
If the HY-03DTD board has been supplied for you to
upgrade your HY-03, t the correct jumpers on the
board as below, follow the instructions on page 7
for opening the unit and plug it in, as per Figure 2-4. Make sure that there is a secure and
rm connection between the plug-in headers, and t the supplied threaded M3 x 12mm
pillar between the two boards using the supplied M3 x 6mm pan head posidrive screws
(one bottom and one top). Replace the HY-03 main board into the HY-03 chassis.
See Table D on the following page for a list of the tones currently implemented.
Limit Level
Disable
Res Auto
Disable
Cap Auto
Disable
Noise Gate
Threshold
Optional
HY-03DTD
Board
Plug-in
Header
Mounting screw
on a pillar
Sample
Threshold
Rings
Res Set
Cap Set
RV4
RV7
RV2
JP1
JP1JP16
JP2 JP3
RV6
RV5
RV8
Figure 2-5 : Jumper settings on the
HY-03DTD board
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HY-03 User Handbook
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2
County Frequencies Type Details Jumper(s)
set on JP…
Austria 440Hz Continuous - 1
Avaya PBX 400Hz Cadence 375ms on,
375ms pause
2 + 3 + 4 + 5
Belgium 450Hz Continuous - 2
Bulgaria 425Hz Cadence 250ms on,
750ms pause,
750ms on,
1000ms pause
1 + 2
Cyprus 350Hz and 450Hz Continuous - 3
Czech Republic 425Hz Continuous - 1 + 3
Denmark 425Hz Continuous - 2 + 3
Finland 425Hz Continuous - 1 + 2 + 3
France 440Hz Continuous - 4
Germany 425Hz Continuous 1 + 4
Greece 440Hz Continuous 2 + 4
Hungary 440Hz Continuous 1 + 2 + 4
Iceland 425Hz Continuous 3 + 4
India 400Hz Cadence 750ms on,
750ms pause
1 + 3 + 4 + 5
Ireland 400Hz and 450Hz Continuous 1 + 3 + 4
Israel 400Hz Continuous 1 + 4 + 5
Italy 425Hz Cadence 200ms on,
200ms pause,
600ms on,
1000ms pause
2 + 3 + 4
Italy2 425Hz Cadence 200ms on,
200ms pause
1 + 2 + 3 +
4 + 5
Japan 400Hz Continuous 2 + 4 + 5
Luxembourg 425Hz Continuous 1 + 2 + 3 + 4
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2
County Frequencies Type Details Jumper(s)
set on JP…
Netherlands 450Hz Continuous 5
Norway 425Hz Continuous 1 + 5
Poland 425Hz Continuous 2 + 5
Portugal 425Hz Continuous 1 + 2 + 5
South Korea 350Hz and 440Hz Continuous 1 + 2 + 4 + 5
Spain 425Hz Continuous 3 + 5
Sweden 425Hz Continuous 1 + 3 + 5
Switzerland 425Hz Continuous 2 + 3 + 5
Taiwan 350Hz and 440Hz Continuous 3 + 4 + 5
United
Kingdom
350Hz and 440Hz Continuous
& Cadence
750ms on,
750ms pause
1 + 2 + 3 + 5
United States 440Hz and 480Hz Continuous 4 + 5
Table D : Dial tone disconnect options
The unit can be programmed with other settings, so please contact us if you need the
settings for a dierent country to be implemented. In this case, it would be useful to have an
audio recording of the dial-tone and a specication of the dial tone parameters.
14
HY-03 User Handbook
TECHNICAL SPECIFICATION
TECHNICAL SPECIFICATION
3
Technical Specication
HY-03 Connection Details
All of the connections are located on the rear of the HY-03 :
Figure 3-1 : HY-03 Rear Panel Connections
Line Output
The line output is an XLR 3 pin male connector (XLR-3-32, 50 ohm balanced oating).
Pin 1 : Screen
Pin 2 : Phase
Pin 3 : Non-phase
Mic/Line Input
The line input is an XLR 3 pin female connector (XLR-3-31, 10k ohm balanced oating).
Pin 1 : Screen
Pin 2 : Phase
Pin 3 : Non-phase
Remotes
The remote connector is a 9-way female (socket) ‘D’ type. To remotely divert, connect pin
1 to pin 2. Pin 3 supplies +15V (up to a maximum of 40mA), with reference to pin 4. The
remotes can act as momentary or latching depending on the setting on the rear panel of
the unit.
Pins viewed from rear of plug (or front of socket on unit)
Pin 1 : Divert switch (Line Connect)
Pin 2 : Common
Pin 3 : Lamp
Pin 4 : Common
The remote lamp tally mimics the front panel line connect switch lamp, i.e. it ashes when
ringing and is on when the line is held.
Telephone
Line
Line
Output
Mic/Line
Input
Remotes
Protective
Earth Terminal
Mains
Input
Telephone
Handset
5 1
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3
Please note the Lamp output is only capable of driving loads up to 40mA , when
connecting any loads the current should be limited to this value using a series resistor.
For example a 390 ohm resistor would limit the current to 38mA.
To connect/disconnect the unit pins 1 and 2 should be connected together via a
contact closure or equivalent. Care should be taken that pin 3 is not connected to pins
1 or 2 and that incompatible external signals are not used. Incorrect conguration can
result in the failure of the connect/disconnect transistor and protection diode which
leaves the unit permanently latched in a connected state and therefore unusable.
As this fault is caused by using the unit outside of its recommended operating
conditions it will not be covered under warranty.
Telephone Handset
This is the connection for a telephone handset and is an RJ11 socket. There is a converter
supplied with the HY-03 for accepting a standard BT605A telephone plug.
Telephone Line
This is the telephone line connection and is an RJ11 6/4 socket. Two cables are supplied with
the unit, to connect this either to a UK BT line jack socket, or an RJ11 socket. The telephone
line is connected via Pins 3 and 4 on the RJ11 and Pins 2 and 5 on the BT Plug (the latch
adjacent to Pin 6).
RJ11 Telephone Connections
Pin 1 : N/C
Pin 2 : Earth recall
Pin 3 : Telephone line A
Pin 4 : Telephone line B
Pin 5 : Ringer
Pin 6 : N/C
Note: When not used in the UK, connect pins 3 and 4
only for operation.
Mains Input
The power supply is connected via an IEC Connector (CEE22, 230V - 50Hz, or 115V – 60Hz).
Protective Earth Terminal
This earth bond screw terminal is a screen terminal which must be connected to an
earth point.
Pin 6 Pin 1
BT Telephone Connections
Pin 1 : N/C
Pin 2 : Telephone line A
Pin 3 : Ringing
Pin 4 : Connected for neatness only
Pin 5 : Telephone line B
Pin 6 : N/C
RJ11 Socket
BT Plug
6
5
4
3
2
1
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3
Technical Specication
Feature Value
Input impedance – line mode (clean feed) 10kΩbalanced0dB,optimumworking
input level 0 to+8dBu
Input impedance – microphone mode 200Ωbalanced
Clean feed limiting input +4dBu
Microphone level range From 74dB to 40dB adjusted by preset pot
Bandwidth to telephone line 250Hz – 4kHz, -3dB ref 1kHz
Telephone line impedance Nominally600Ω
Telephone line impedance range 300Ωto1500Ω
Output impedance 50Ωbalancedoating0dBu
Output level range +8dB to –14dB adjusted by preset pot
Rejection ratio 45dB on 1kHz tone, typically 28dB on
complex waveforms, reference peak level
of 0dB
Ring detector sensitivity 1 ring to 6 rings
Power 230V 50Hz, or 115V 60Hz. 6W for HY-03.
Physical Specication
Order
Code
Description Height Width Depth* Total
Nett
Weight
Total
Gross
Weight
HY-03 Automatic analogue
TBU with ringing
detector, free standing
4.5cm 21.8cm 17.5cm 1.25kg 2.0kg
HY-03S Automatic analogue
TBU with ringing
detector, 19” rack
mounted
4.5cm
(1U)
48.3cm
(19”
rack
width)
17.5cm 1.30kg 2.1kg
HY-03T Twin automatic
analogue TBU with
ringing detector, 19”
rack mounted
4.5cm
(1U)
48.3cm
(19”
rack
width)
17.5cm 2.60kg 4.0kg
*Depth is measured from the front of the divert button to the back of the remotes connectors.
HY-03 User Handbook
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TECHNICAL SPECIFICATION
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3
Accessories
Order Code Description
HY-03DTD Dial tone detect add-on board
HY-03CON Front panel conversion kit, HY-03S 19” rack-mount front to HY-03
free standing
HY-03SCON Front panel conversion kit, HY-03 free standing to HY-03S 19”
rack-mount front
HY-03TCON Front panel conversion kit, HY-03 or HY-03S, to HY-03T 19”
rack-mount front
Approvals Information
Sonifex is a BABT approved manufacturing facility with a license to build
telecommunications equipment and all telecom products are compliant with BS6301,
BS7002, BS415 and CTR21. The following product description is necessary for BABT approval
and provides information on the connection and operating conditions of the units.
Manufacturer
Sonifex Limited,
61 Station Road,
Irthlingborough,
Northants,
NN9 5QE
United Kingdom
Equipment Type
HY-03 telephone balance unit.
BABT Approval Numbers
HY-03 : S/3619/23/L/501792
Functions
The HY-03 Telephone Balance Unit is suitable for connection to B.T. exchange lines with a
series connected telephone at the handset port. The hybrid unit is used as a four wire to
two wire converter. Incoming calls received at the handset may be diverted to the hybrid
unit and produce a ‘telephone’ signal at the output of the unit. Signals presented at the
input are transmitted to the telephone line only. The HY-03 automatically balances the
telephone line.
Specied Systems
The HY-03 is suitable for connection to any exchange line forming part of a Public Switched
Telephone Network, PSTN, or a Relevant Branch system for PSTN lines or any extension.
This equipment is not suitable as an extension to a payphone. A denition of Relevant
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HY-03 User Handbook
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TECHNICAL SPECIFICATION
TECHNICAL SPECIFICATION
Branch System for PSTN is given in BS6789 : Section 6.1 : 1986 Clause 2.9; including the note
to that clause.
Ringer Equivalence Number
The REN=1 marking on the rear of this equipment relates to the performance of the
apparatus when used in combination with other items of apparatus.
The REN indicates the maximum number of items that should be connected simultaneously
to the line. This equipment may be connected with series apparatus up to REN = 4
maximum.
Accessory Ports
Barriered Ports - The Handset series connection complies with BS6301
Accessory Ports - Mic/Line Input
Output
Remotes
Conditions
This apparatus is not designed for use under controlled conditions of temperature and
relative humidity.
Series Connection
When connected into the loop connection between the main apparatus and the PSTN, this
apparatus introduces a voltage drop at a current of 40mA of 0.300V.
The apparatus should not be used in conjunction with other series connected apparatus
such that the aggregate declared voltage drops, together with that of any relevant wiring at
40mA, exceeds 2.0 volts.
Facilities
This apparatus has been approved for use as a telephone hybrid unit (four wire to two
wire converter) and for use with a series connected simple telephone. Any other usage
will invalidate the approval of the apparatus if as a result it then ceases to comply with the
standards against which approval was gained.
Statutory Mark
Approved for connection to telecommunications systems specied in the instructions for
use subject to the conditions set out in them.
HY-03 User Handbook
19
12
www.sonifex.co.uk
t:+44 (0)1933 650 700
f:+44 (0)1933 650 726
sales@sonifex.co.uk
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