Sonifex CM-TB8 User Handbook Manual

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CM-TB8 8 Channel Talkback Control Unit

User Handbook

CM-TB8 8 Channel Talkback Control Unit User Handbook

CM-TB8 8 CHANNEL TALKBACK CONTROL UNIT

CM-TB8 8 CHANNEL TALKBACK CONTROL UNIT HANDBOOK

This handbook is for use with the following product: CM-TB8 8 Channel Talkback Control Unit

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 fictitious adaptation and are designed solely to document the use of Sonifex product.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONTENTS

Warranty i

Warranty and Liability i Unpacking the CM-TB8 iii Returning the Warranty Card iii

Safety Information iv

Safety of Mains Operated Equipment iv Voltage Setting Checks iv Fuse Rating iv Power Cable and Connection iv Ordering the Correct Mains Lead v

Installation Information v

Atmosphere v Electromagnetic Radiation v WEEE & RoHS Directives - Sonifex Statement vi

Introduction 1

Front Panel Controls, Connections & Indicators 2

Headphone Output Connection 2 Microphone Input Connection 2 Headset Connection 2 Talk Level Indicators 2 Input Select Indicators 2 Multi-Function Rotary Control 2 Group Talk Button 3 Channel 1 to 8 Talk Buttons 4 Channel 1 to 8 IFB/4W Select Switches 4 Channel 1 to 8 Monitor Level Potentiometers 4 Loudspeaker Mute Button 5 Loudspeaker Dim Potentiometer 5 Monitor Level Potentiometer 5

Rear Panel Connections 6

4W IN Input Connections 6 TB OUT Output Connections 6 IFB A & B Programme Input Connections 6 MIC Output Connection 6 Remote Connections 6 Ethernet Connection 6 LS Output Connection 6

Line-Up Tone Mode 7

Remotes 8

Remotes 1 – Outputs 8 Remotes 2 – Inputs 8

Configuration Options 10

On-Board Conguration Mode 10 Embedded Web Server 11

Home Page 13 Network Settings Page 13 Display Settings Page 14 Talk Level Settings Page 15 Group Talk Settings Page 16 Load Settings Page 17 Save Settings Page 18 Update Page 18

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONTENTS & FIGURES

Configuration Option Defaults 20

Configuration Template Set 1 (read only) 20 Configuration Template Set 2 (read only) 20 Configuration Template Sets 3 to 6 21

Connection Example 22

Button Operation Reference 23

Connection Details 24

Headphone Output – ¼ inch (6.35mm) stereo jack socket 24 Microphone Input – Electronically balanced 3 pin female XLR-3 24 Headset – 5 pin female XLR-5 (microphone input is electronically balanced) 24 4-Wire Inputs – Transformer balanced 3 pin female XLR-3 24 Talkback Outputs – Transformer balanced 3 pin male XLR-3 24 IFB Inputs – Transformer balanced 3 pin female XLR-3 24 Microphone Output – Electronically balanced 3 pin male XLR-3 24 Remotes 1 – 15-way ‘D’-type socket 24 Remotes 2 – 15-way ‘D’-type socket 25 Loudspeaker Output – ¼ inch (6.35mm) jack socket 25

Technical Specification 26

CM-TB8T Introduction 28

Enabling the Telephone Interface 28 Making a Telephone Call 29

Direct Dialling 29 Dialling Using an External Telephone Handset 29

Receiving a Telephone Call 29 Handling a Connected Telephone Call 30 Ending a Telephone Call 30 Embedded Web Server 31

PSTN Settings Page 31

PSTN Telephone Interface Connection Details 32

Telephone Line – RJ11 Socket 32 Telephone Handset – RJ11 Socket 32

Figures

Fig A: Packing List iii Fig B: Power Connections iv Fig C: Mains Lead Table v Fig 1-1: System Block Diagram. 1 Fig 2-1: CM-TB8 Front Panel. 2 Fig 3-1: CM-TB8 Rear Panel. 6 Fig 6-1: Home Page. 13 Fig 6-2: Network Settings Page. 13 Fig 6-3: Display Settings Page. 14 Fig 6-4: Microphone Settings Page. 14 Fig 6-5: Talk Level Settings Page. 15 Fig 6-6: Group Talk Settings Page. 16 Fig 6-7: Channel Settings Page. 16 Fig 6-8: Load Settings Page. 17 Fig 6-9: Save Settings Page. 18 Fig 6-10: Update Page. 18 Fig 8-1: Connection Example. 22 Fig 12-1: Channel Settings Page 28 Fig 12-2: PSTN Settings Page 31

CM-TB8 8 Channel Talkback Control Unit User Handbook

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 satisfied:

(i) notification 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 specified 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 modified 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 benefit 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.

(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);

WARRANTY

CM-TB8 8 Channel Talkback Control Unit User Handbook

(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 profits 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 specific 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 defined by the

Consumer Transactions (Restrictions on Statements) Order 1976) the statutory rights of the Purchaser are not affected by these Conditions of Sale.

WARRANTY

CM-TB8 8 Channel Talkback Control Unit User Handbook

iii

Unpacking the CM-TB8

The CM-TB8 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 CM-TB8

CM-TB8 1

IEC mains lead fitted with moulded mains plug 1

Handbook and warranty card 1

Fig A: Packing List

Each CM-TB8 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 modifications, 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 CM-TB8).

Serial Number ………………………………………

WARRANTY

CM-TB8 8 Channel Talkback Control Unit 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 specified 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.

Voltage Setting Checks

Ensure that the machine operating voltage is correct for your mains power supply by checking the box in which your CM-TB8 was supplied. The voltage is shown on the box label. Please note that all CM-TB8s have a universal power supply.

Fuse Rating

The CM-TB8 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 fire hazard, under equipment fault conditions. The fuse rating for the CM-TB8 is:

Universal 85-264V operation - 2A 5x20mm SB

The active fuse is fitted on the outside rear panel of the unit.

Power Cable and Connection

An IEC power connector is supplied with the CM-TB8 which has a moulded plug attached – this is a legal requirement. If no moulded plug has been supplied with your CM-TB8, please contact your supplier, because an IEC connector is always supplied from the Sonifex factory.

If for any reason, you need to use the CM-TB8 with a different 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)

Fig B: Power Connections

SAFETY INFORMATION

CM-TB8 8 Channel Talkback Control Unit User Handbook

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.

Ordering the Correct Mains Lead

When ordering a CM-TB8 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

Fig C: Mains Lead Table

E.g. order CM-TB8 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 fixing screws. It is essential to maintain this earth ground connection to ensure a safe operating environment and provide electromagnetic shielding.

SAFETY INFORMATION

CM-TB8 8 Channel Talkback Control Unit User Handbook

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 identified 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 affected 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 offered as RoHS compliant, or LF, only after sufficient 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 identification of RoHS compliance. Thus whilst every effort is made to ensure compliance, Sonifex Ltd makes no warranty, or certification, or declaration of compliance concerning said components.

Sonifex Ltd defines “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.

WEEE & ROHS DIRECTIVE

CM-TB8 8 Channel Talkback Control Unit User Handbook

INTRODUCTION

Introduction

The CM-TB8 Talkback Control Unit is a powerful and highly flexible self contained communications unit allowing multiple 4-wire and IFB connections within a single 1U rack space. Using the latest DSP technology, the CM-TB8 integrates a high quality, digitally controlled audio system with an intuitive and configurable user interface. It offers easy connection to any industry standard talkback system including the Sonifex CM-TBU line listen unit plus the CM-CU1 and CM-CU21 commentator units.

The CM-TB8 provides 8 channels of 4-wire communication, with 2 additional IFB inputs that can be routed to each channel. The unit has individual connections for a microphone and headset, and the gain for each input can be independently set. Phantom power and a wide gain range ensure support for most microphone types. All of the audio processing is done in the digital domain. This gives greater control of the audio mixing and routing functions and allows smoother changes in signal level. Likewise, the volume potentiometers on the front panel control gain digitally, ensuring noise free operation.

Fig 1-1: System Block Diagram

CM-TB8 8 Channel Talkback Control Unit User Handbook

FRONT PANEL CONTROLS, CONNECTIONS & INDICATORS

Front Panel Controls, Connections & Indicators

Fig 2-1: CM-TB8 Front Panel

Headphone Output Connection

The headphone output is via a ¼ inch (6.35mm) stereo jack socket capable of driving 32Ω 600Ω professional headphones. Lower impedance headphones should not be used.

Microphone Input Connection

The electronically balanced microphone input is via a 3 pin female XLR-3 connector. The available gain for this input ranges from +6dB to +69dB. Phantom powered microphones are supported on this input.

Headset Connection

The headset connection is via a 5 pin female XLR-5 connector. It shares the same input and output circuits as the separate microphone and headphone, but the gain settings are independent and the available range is from +6dB to +69dB. Changing the input type automatically selects the corresponding gain settings. Phantom power is also available on this input.

The microphone and headset inputs are protected by a level limiter. The limiter will start to function when the input signal exceeds approximately +8.5dB. When the limiter is active, the input select LED indicators will illuminate red instead of amber. When the input signal is reduced and the limiter turns off, the input select indicators return to amber illumination.

Talk Level Indicators

In the normal operating mode, the left indicator illuminates green when the gain adjusted microphone signal exceeds 0dB, and the right indicator illuminates red when the signal exceeds +8dB.

Input Select Indicators

In the normal operating mode, these indicators illuminate amber to show which microphone type is currently selected, and whether phantom power is enabled. They also show when the microphone limiter is actively limiting the level of the signal, by changing from amber to red.

Multi-Function Rotary Control

The rotary control has various functions which are dependent on the current operating mode.

Headphone Socket

Microphone

Input

Connection

Headset

Connection

Talk Level Indicators

Input Select Indicators

Multi-Function Rotary Control

Channel

IFB/4W

Select Switch

Loudspeaker

DIM

Potentiometer

Loudspeaker Mute Button

Channel Monitor Level Potentiometer

Channel Talk Button

Monitor

Level

Potentiometer

Loudspeaker

CM-TB8 8 Channel Talkback Control Unit User Handbook

FRONT PANEL CONTROLS, CONNECTIONS & INDICATORS

FRONT PANEL CONTROLS,

CONNECTIONS & INDICATORS

In the normal operating mode, the rotary control can adjust the talk level. This is the level of the microphone signal routed to the talkback outputs. The selected microphone gain settings and the subsequent microphone output level at the rear panel connector are not changed.

To adjust the talk level: first ensure that the function is enabled and the required range of adjustment has been selected. See the Talk Level Settings Page in the Embedded Web Server section on page 11. Turn the rotary control to increase or decrease the current talk level within the limits set by the talk level adjust options. There is an additional option that requires the rotary control to be pressed before any adjustment to the talk level can be made. With this option selected, the adjustment mode will timeout after 1 second of inactivity of the rotary control.

The rotary control also accesses the microphone select and microphone gain and filter setup modes.

To access the microphone select and microphone gain and filter setup modes: press and hold the rotary control for 3 seconds whilst in the normal operating mode. The two talk level LEDs will illuminate red. Turn the rotary control to select the mode to enter, either microphone gain and filter setup mode when the two talk level LEDs are illuminated, or microphone select mode when MIC, Phantom and HS LEDs are illuminated. When the required LEDs are illuminated, press the rotary control to enter the associated mode. If the rotary control is not turned or pressed for 3 seconds, this function will timeout and the unit will return to normal operation. Please note, entering microphone gain and filter setup mode resets the current talk level adjust value to zero.

To change the selected microphone type: once in microphone select mode, the currently selected microphone setting LEDs will flash. Turn the rotary control to change the selection. Both microphone and headset type can be selected with or without phantom power. A brief press on the rotary control will return the unit to normal operation.

To change the microphone gain and filter: once in the microphone gain and filter setup mode, the talk buttons on channels 1-8 will illuminate to show the approximate current gain setting for the currently selected microphone. Turn the rotary control to increase or decrease the gain. With no buttons illuminated, the gain is approximately 6dB. The gain increases by approximately 8dB as each talk button is illuminated with the maximum gain of approximately 69dB gain when all talk buttons are illuminated. The talk level LEDs will show the current level of the microphone signal as it exceeds 0dB and +8dB respectively, and the microphone signal can be monitored in the headphones.

The state of the microphone filter is shown on the LS mute button LED. If the LED is illuminated red, the filter is on. Press the LS mute button to enable or disable the filter.

Once the required microphone gain and filter setting has been set, a brief press on the rotary control will return the unit to normal operation.

Group Talk Button

The group talk button simultaneously activates all of the talk buttons that have been

CM-TB8 8 Channel Talkback Control Unit User Handbook

FRONT PANEL CONTROLS, CONNECTIONS & INDICATORS

included in the group talk function. By default, all channels are included. When the group talk function is active, the button illuminates red, as do the talk buttons on the channels activated by the group talk function. By default, the button has a momentary action that will automatically latch in the on state if pressed briefly.

Channel 1 to 8 Talk Buttons

Each talk button routes the currently selected microphone signal to the corresponding talkback output. When a talk button is active, it illuminates red. The channels audio call indication illuminates the talk button green when the signal level on the corresponding 4W IN input rises above -12dB. The audio call is not shown on talk channels that are active. By default, the talk buttons have a momentary action that will automatically latch in the on state if pressed briefly.

Channel 1 to 8 IFB/4W Select Switches

These switches select the operating mode for each channel, either 4 wire or interruptible fold back. The IFB input to each channel can be either the channels own 4W IN input, or one of the two dedicated programme inputs, IFB A or IFB B. This selection is made in the configuration options using either the on-board configuration mode or the embedded web server. See the Configuration Options section on page 10. As an alternative to the standard IFB modes, where the microphone signal interrupts the IFB signal when the channel is active, an additional option allows the microphone signal to be mixed with the IFB signal. In this mode, when a talk channel is activated, the level of the selected IFB input signal on that channel is reduced by 12dB prior to being mixed with the microphone signal.

To use a talk channel in 4W mode: put the IFB/4W switch in the 4W position. In this mode, the signal on the 4W IN input connector is routed to the headphones/headset and loudspeaker at the level set by the channels own monitor level potentiometer, with the overall level controlled by the MON level potentiometer. When the talk button is pressed, the microphone signal is routed to the channels talkback output at the TB OUT connector, and the level of the feed to the loudspeaker (not headphones/headset) is reduced by the level preset by the dim potentiometer.

To use a talk channel in IFB mode: put the IFB/4W switch in the IFB position. In this mode, the signal on the 4W IN input connector is routed to the headphones/headset and loudspeaker at the level set by the channels own monitor level potentiometer, with the overall level controlled by the MON level potentiometer. The signal from the selected IFB input, either the channels own 4W IN input or one of the dedicated programme inputs, IFB A or IFB B, is routed to the talkback output at the TB OUT connector. When the talk button is pressed, the signal at the talkback output is either replaced by or mixed with the microphone signal, and the level of the feed to the loudspeaker (not headphones/headset) is reduced by the level preset by the dim potentiometer.

Channel 1 to 8 Monitor Level Potentiometers

These controls set the level of the signal that is routed to the monitor headphones/headset and loudspeaker from each channels input.

CM-TB8 8 Channel Talkback Control Unit User Handbook

FRONT PANEL CONTROLS, CONNECTIONS & INDICATORS

FRONT PANEL CONTROLS,

CONNECTIONS & INDICATORS

Loudspeaker Mute Button

The loudspeaker mute cuts the signal fed to the loudspeaker and the loudspeaker output on the rear panel. The mute can also be activated via a remote input, see the Remote section on page 8. The button has a latching action and illuminates red when activated or flashes red to indicate the loudspeaker mute has been activated by the remote input. The button also indicates when the loudspeaker dim is active by illuminating green. The mute button does not affect the signal routed to the headphones.

Loudspeaker Dim Potentiometer

The loudspeaker dim pre-set potentiometer controls the level of attenuation applied to the signal fed to the loudspeaker and rear panel loudspeaker output when any of the talk channels are active, or the loudspeaker dim remote input is active. The attenuation range is between full on and muted and it is adjusted using a small flat blade screwdriver.

Monitor Level Potentiometer

The monitor level potentiometer controls the overall level of the signal routed to the headset/headphone outputs, the loudspeaker and the loudspeaker output on the rear panel.

CM-TB8 8 Channel Talkback Control Unit User Handbook

REAR PANEL CONNECTIONS

Rear Panel Connections

Fig 3-1: CM-TB8 Rear Panel

4W IN Input Connections

The transformer balanced 4W IN inputs are via 3 pin female XLR-3 connectors. These are the main audio inputs to each channel.

TB OUT Output Connections

The transformer balanced TB OUT talkback outputs are via 3 pin male XLR-3 connectors. These are the main audio outputs from each channel.

IFB A & B Programme Input Connections

The transformer balanced IFB inputs are via 3 pin female XLR-3 connectors.

MIC Output Connection

The electronically balanced microphone output is via a 3 pin male XLR-3 connector. It outputs the gain adjusted, level limited signal from the selected microphone or headset input.

Remote Connections

The remote connections are via two 15-way ‘D’-type sockets. All of the remote outputs are on the remote 1 connector, whilst the inputs are all on the remote 2 connector. See the Remotes section on page 8 for connection details.

Ethernet Connection

The Ethernet connection provides 100Mb network capabilities via a RJ45 connector.

LS Output Connection

The loudspeaker output is via a ¼ inch (6.35mm) jack socket. When an external loudspeaker is connected, the internal loudspeaker is muted.

4W Inputs

Talkback Outputs

IFB Inputs

Microphone

Output

Mains Power

Inlet

Ethernet

Remotes

Loudspeaker

Output

CM-TB8 8 Channel Talkback Control Unit User Handbook

LINE-UP TONE MODE

Line-Up Tone Mode

The CM-TB8 has a built in Test Tone generator which selectively routes a line-up tone of 1kHz at 0dB to all talkback outputs to assist channel identification and cabling checks. There are two test tone modes, manual and auto.

To enable line-up tone mode: press and hold the rotary control and the group talk button and channel 1 and 2 talk buttons for 5 seconds. The group talk button will flash amber to indicate the line-up tone mode has been entered. The rotary control, group talk button and talk buttons can now be released. By default, manual mode is enabled.

To switch between manual and auto tone modes: turn the rotary control one position in either direction.

In manual line-up tone mode, press the talk buttons on each channel to route test tone to the corresponding talkback output. Each talk button will illuminate amber when pressed. When a button is released, the tone on that talkback output will be muted.

In auto line-up tone mode, each of the eight talkback outputs are automatically identified by a unique number of short tone bursts, lasting 0.25 seconds each, which are repeated every 5 seconds. Each talk button flashes amber to indicate when tone is being routed to that channel, and the number of pulses corresponds to the channel number.

The 4W IN inputs function normally and any signal present is still routed to the loudspeaker and headphone monitor outputs. This could be useful in allowing the user to receive instructions on which channel to output tone to when using the test tone in manual mode.

To exit the line-up tone mode: press the rotary control once. The unit will then return to normal operating mode.

CM-TB8 8 Channel Talkback Control Unit User Handbook

REMOTES

Remotes

The two remote connectors on the rear panel provide a selection of remote inputs and outputs. All of the remote outputs are on the Remotes 1 connector and are open collector outputs, and all of the remote inputs are on the Remotes 2 connector and are active low.

Remotes 1 – Outputs

Pin1: Channel 1 Talk active – open collector output Pin2: Channel 2 Talk active – open collector output Pin3: Channel 3 Talk active – open collector output Pin4: Channel 4 Talk active – open collector output Pin5: Channel 5 Talk active – open collector output Pin6: Channel 6 Talk active – open collector output Pin7: Channel 7 Talk active – open collector output Pin8: Channel 8 Talk active – open collector output Pin9: Group Talk active – open collector output Pin10: Loudspeaker Dim active – open collector output Pin11: Loudspeaker Mute active – open collector output Pin12: Channels 1-8 Audio Call active – open collector output Pin13: Ground Pin14: Ground Pin15: Ground

The remote outputs are “tally” indicators and the talk active outputs indicate when any of the channel talk or group talk buttons are active. The loudspeaker dim and mute outputs indicate the state of the signal routed to the internal and external loudspeakers. The audio call active remote output indicates when the signal level on one or more of the 4W IN inputs is greater than -12dB.

Remotes 2 – Inputs

Pin1: Channel 1 Remote Call – active low input Pin2: Channel 2 Remote Call – active low input Pin3: Channel 3 Remote Call – active low input Pin4: Channel 4 Remote Call – active low input Pin5: Channel 5 Remote Call – active low input Pin6: Channel 6 Remote Call – active low input Pin7: Channel 7 Remote Call – active low input Pin8: Channel 8 Remote Call – active low input Pin9: Loudspeaker Dim enable – active low input Pin10: Loudspeaker Mute enable – active low input Pin11: no connection Pin12: no connection Pin13: Ground Pin14: Ground Pin15: Ground

CM-TB8 8 Channel Talkback Control Unit User Handbook

REMOTES

When a remote call is active, the corresponding talk button flashes amber. This call condition takes priority over the audio level activated call input on each channel. The loudspeaker mute input, when active, takes priority over the mute button operation.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Configuration Options

The CM-TB8 has a wide range of user configurable options. These options are arranged in sets, with an active set which contains the current working settings, and six configuration set templates that allow settings to be stored and recalled at a later date. Two of the configuration templates, sets 1 and 2, are read only and cannot be modified. The other four, sets 3 to 6, can be used to store customised settings. This allows the unit to be preconfigured for a range of user scenarios which can be instantly recalled. There are two methods available for modifying the configuration settings, the on-board configuration mode and the embedded web server. Any configuration settings that are changed using either of these two methods only affect the active set.

On-Board Conguration Mode

The on-board configuration mode allows a limited number of configuration options in the active set to be modified without the need of a PC. It also allows the active set to be saved to one of the four editable sets, 3 to 6.

To enter the on-board configuration mode: press and hold the rotary control and channel 7 and 8 talk buttons for 5 seconds. The 2 talk level LEDs and the LS mute button LED will flash red to indicate the configuration mode has been entered. The rotary control and talk buttons can now be released.

There are four configuration options available in this mode and the MIC, Phantom and HS LEDs illuminate red in sequence to indicate which option is currently being displayed. Option 4 is shown when all three LEDs are illuminated. The value of the selected option on a channel is shown by a sequence of recurring red flashes on the corresponding talk button, one flash equals mode 1, two flashes equals mode 2 etc.

To cycle through the options: press the group talk button once. The MIC, Phantom and HS LEDs will change to indicate which new option is being displayed.

To change the current option setting: press the corresponding talk button once. The number of flashes will increase to indicate the new setting. Once the maximum option mode setting has been reached, the value will wrap around to mode 1.

The on-board configuration mode options are listed below:

Option 1 – Channel inclusion in the group talk function (MIC LED is illuminated) Mode 1 – channel is excluded from the group talk function Mode 2 – channel is included in the group talk function

Option 2 – Channel IFB mode (Phantom LED is illuminated) Mode 1 – 4W IN is IFB, Mic signal interrupts talkback signal when talk is active Mode 2 – IFB A IN is IFB, Mic signal interrupts talkback signal when talk is active Mode 3 – IFB B IN is IFB, Mic signal interrupts talkback signal when talk is active Mode 4 – 4W IN is IFB, Mic signal is mixed with talkback signal when talk is active

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Mode 5 – IFB A IN is IFB, Mic signal is mixed with talkback signal when talk is active Mode 6 – IFB B IN is IFB, Mic signal is mixed with talkback signal when talk is active

Option 3 – Channel 1 & 2 telephone interface mode (HS LED is illuminated) Mode 1 – Normal mode Mode 2 – Telephone mode (requires telephone expansion card to be fitted)

Option 4 – Save the active set (MIC, Phantom and HS LEDs illuminated) This option allows the current active set to be saved to set 3, 4, 5 or 6 by pressing and holding the talk button on the channel corresponding to the required set number for 3 seconds. The talk button will illuminate will flash red, then amber, then green to confirm the set has been saved. For example, to save the active set to set 5, press and hold the channel 5 talk button for 3 seconds. Press and hold channel 3 Talk button for 3 seconds to save the active set to set 3 Press and hold channel 4 Talk button for 3 seconds to save the active set to set 4 Press and hold channel 5 Talk button for 3 seconds to save the active set to set 5 Press and hold channel 6 Talk button for 3 seconds to save the active set to set 6

To exit the on-board configuration mode: press and hold the group talk button for 3 seconds. The unit will then return to normal operating mode.

Embedded Web Server

The CM-TB8 has an embedded web server which provides easy access to all of the configuration options through a web browser. It also gives access to system settings and allows the firmware to be easily updated when new releases are made available.

To use the embedded web server, the unit needs to be connected to a network via the Ethernet port on the rear panel. By default, the CM-TB8 is configured as a DHCP client and when connected to a network, it will search for a DHCP server in order to obtain its IP address. If no DHCP server is found within 45 seconds, the unit will default to its default static network settings. To order to access the unit on the network, it is first necessary to determine the current active IP address.

To discover the current active IP address: press and hold the rotary control and the group talk button for 3 seconds. All the LEDs on the front panel will turn off. The rotary control and group talk button can now be released. For each subsequent press of the rotary control, the current digit within the IP address will be shown on the group talk and talk buttons. The MIC, Phantom and HS LEDs indicate which digit is being shown within the current part of the IP address. The LS mute button LED illuminates to indicate a “dot” which separates each part of the address. For example, for the address 192.168.0 124, the following sequence of LEDs will be illuminated:

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Address MIC Phantom HS Group

Talk

Talk 1Talk 2Talk 3Talk 4Talk 5Talk 6Talk 7Talk 8LS

Mute

1 9 2

. 1 6 8

. 0

. 1 2 4

After the last digit of the IP address has been displayed, the next press of the rotary control returns the unit to the normal operating mode. If the address is 0.0.0.0, a valid IP address has not yet been obtained from a DHCP server within the 45 second timeout period.

Once the IP address of the unit is known, simply type this into the address bar of a web browser. The home page of the connected CM-TB8 will be displayed.

Each page within the web server is accessed via one of the tabs in the menu bar below the title banner. Some tabs also have drop down sub-menus. Each page follows a similar format, the left side shows the main content of the page, either information or options and settings, and the right side gives a brief description of the each item. Pages that include configuration options also have a submit button. This transfers the new settings on the current page to the connected unit.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Home Page

Fig 6-1: Home Page

The home page provides some general information about the connected CM-TB8. The serial number, firmware and boot loader version numbers should be quoted if you ever need to contact Sonifex Ltd about the unit.

Network Settings Page

Fig 6-2: Network Settings Page

This page shows the network related settings. The unit name allows the connected CM-TB8 to be easily identified if there is more than one unit on the network. The IP address, subnet

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

mask and gateway IP address are used only if DHCP is disabled, or if a DHCP server is not detected on the network within a timeout period of 45 seconds.

Display Settings Page

Fig 6-3: Display Settings Page

This page shows the display settings. The LED brightness setting changes the illumination intensity of the front panel buttons and indicators to allow for a range of installation environments.

Microphone Settings Page

Fig 6-4: Microphone Settings Page

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

The first sub-item under the configuration tab shows the microphone options. Both the microphone and headset inputs have individual gain control, and the type option determines which settings are currently used. Enable the phantom power option when using microphone or headsets that require a 48V dc power supply. The filter option enables a band pass filter that reduces the level of signals outside of the normal speech bandwidth. Please note, updating the options on this page resets the current talk level adjust value to zero.

Talk Level Settings Page

Fig 6-5: Talk Level Settings Page

The talk level adjustment range sets the amount of microphone gain adjustment available. This is the second sub-item under the configuration tab. If this feature is enabled, the adjustment is made by turning the rotary control. An alternative option requires the rotary control to be pressed before any adjustment can be made.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Group Talk Settings Page

Fig 6-6: Group Talk Settings Page

The third sub-item under the configuration tab shows the group talk settings. These settings determine which channels are active when the group talk button is pressed. The button mode option selects the way the group talk button responds when pressed. In momentary mode, group talk is active only when the button is pressed. In latching mode, a separate button press is required to enable and disable group talk. With the option set to auto, the button has a momentary action that will automatically latch on or off if pressed briefly

Channel Settings Page

Fig 6-7: Channel Settings Page

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

The fourth sub-item under the configuration tab shows the individual channel settings. The selected IFB mode is active for each channel when the front panel switch on that channel is in the IFB position. There are three IFB inputs available to each channel, and there are options to allow the microphone signal to be mixed with the IFB input signal rather than interrupt it. The button mode setting provides similar options to the group talk button mode. The telephone mode option is only available on channels 1 and 2 and only if a telephone expansion board is fitted.

Load Settings Page

Fig 6-8: Load Settings Page

This page allows one of the six configuration set templates to be loaded in the current active set. The details of the selected set are shown. Press the load button to implement the new settings.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

Save Settings Page

Fig 6-9: Save Settings Page

This page allows the current active configuration to be saved to one of the four editable configuration set templates. The details of the current active configuration are shown. Press the save button to store the settings in the selected set.

Update Page

Fig 6-10: Update Page

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTIONS

This page allows the firmware on the connected unit to be updated. Updates will be made available on the Sonifex website for enhancements and bug fixes. If a new version of firmware exists, download the file onto a computer. Press the browse button to locate the file and select it. Then press the update button to transfer the new firmware to the CM-TB8. The update process will take approximately 20 seconds during which time the unit will reboot automatically.

If the unit fails to reboot after a firmware update, this could indicate that an incompatible file was selected or the file was corrupt. Try power cycling the unit first; disconnect the mains power, wait several seconds then re-apply power. If the unit still fails to boot, it is possible to force it into boot loader mode. In this mode, the unit can accept new firmware as the boot loader has its own simplified web server.

To run the unit in boot loader mode: power up the unit whilst holding the group talk button and channels 1, 2 and 3 talk buttons. The MIC, Phantom and HS will flash green in a repeating cycle to indicate the unit is in boot loader mode. Type the IP address of the unit into a web browser to access the boot loader web server. Select the update tab, press the browse button to select the firmware file and then press the update button.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTION DEFAULTS

Configuration Option Defaults

It is possible to return all configuration template sets to default settings. Also, by returning the templates sets to defaults, the active set is overwritten with the settings stored in template set 1. The default settings for the templates sets are as follows:

Configuration Template Set 1 (read only)

Talk Adjust: Enabled Talk Adjustment Range: ±6dB Group Talk Button Action: Auto Channel 1 Group Talk Inclusion: Enabled Channel 1 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 1 Talk Button Action: Auto Channel 1 Telephone Mode: Disabled Channel 2 Group Talk Inclusion: Enabled Channel 2 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 2 Talk Button Action: Auto Channel 2 Telephone Mode: Disabled Channel 3 Group Talk Inclusion: Enabled Channel 3 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 3 Talk Button Action: Auto Channel 4 Group Talk Inclusion: Enabled Channel 4 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 4 Talk Button Action: Auto Channel 5 Group Talk Inclusion: Enabled Channel 5 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 5 Talk Button Action: Auto Channel 6 Group Talk Inclusion: Enabled Channel 6 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 6 Talk Button Action: Auto Channel 7 Group Talk Inclusion: Enabled Channel 7 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 7 Talk Button Action: Auto Channel 8 Group Talk Inclusion: Enabled Channel 8 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 8 Talk Button Action: Auto

Configuration Template Set 2 (read only)

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONFIGURATION OPTION DEFAULTS

Channel 1 Telephone Mode: Enabled (disabled in telephone card not fitted) Channel 2 Group Talk Inclusion: Enabled Channel 2 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 2 Talk Button Action: Auto Channel 2 Telephone Mode: Enabled (disabled in telephone card not fitted) Channel 3 Group Talk Inclusion: Enabled Channel 3 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 3 Talk Button Action: Auto Channel 4 Group Talk Inclusion: Enabled Channel 4 IFB Mode: 4W input is IFB, Mic signal interrupts talkback signal Channel 4 Talk Button Action: Auto Channel 5 Group Talk Inclusion: Enabled Channel 5 IFB Mode: IFB A input is IFB, Mic signal interrupts talkback signal Channel 5 Talk Button Action: Auto Channel 6 Group Talk Inclusion: Enabled Channel 6 IFB Mode: IFB A input is IFB, Mic signal interrupts talkback signal Channel 6 Talk Button Action: Auto Channel 7 Group Talk Inclusion: Enabled Channel 7 IFB Mode: IFB B input is IFB, Mic signal interrupts talkback signal Channel 7 Talk Button Action: Auto Channel 8 Group Talk Inclusion: Enabled Channel 8 IFB Mode: IFB B input is IFB, Mic signal interrupts talkback signal Channel 8 Talk Button Action: Auto

Configuration Template Sets 3 to 6

By default, configuration templates sets 3 to 6 are initialised with the settings from template set 1.

To return all configuration settings to default values: remove mains power from the unit and allow it to switch off. Press the loudspeaker mute button and keep it pressed whilst applying mains power. The loudspeaker mute button will illuminate green when the button press is registered. Continue to keep the button pressed for a further 5 seconds until it flashes green and red. The loudspeaker mute button can now be released and the unit will boot up into the normal operating mode.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONNECTION EXAMPLE

Connection Example

The following diagram shows a simple example of how the CM-TB8 can be used in an outside broadcast scenario.

Fig 8-1: Connection Example

In this example, the CM-TB8 is connected to a CM-CU21 Commentator Unit. Any of the CMTB8 channels can optionally be configured to operate in IFB mode such that they receive either the directors feed on IFB A or the programme feed on IFB B. Direct communication from the CM-TB8 to any of the connected channels can then interrupt the standing feed, by use of the talk buttons. The remote outputs from the two channels on the CM-TB8 that are connected to the commentator unit can be configured to provide a remote call indication when the talk channels on the control unit are active. The return audio talkback channels from the CM-CU21 will then provide a visual signal on the CM-TB8 if a presenter at the commentary position needs to gain the attention of the control unit operator.

CM-TB8 8 Channel Talkback Control Unit User Handbook

BUTTON OPERATION REFERENCE

Button Operation Reference

The following table list all the button combination required to enter the various operating modes on the CM-TB8. The duration column details how long the buttons need to be pressed to enter the associated mode.

FUNCTION ENCODER GROUP

TALK

LS MUTE DURATION

12345678

Enter MIC Menu  3s

Load Config Set 1 into Active Set

5s

Load Config Set 2 into Active Set

 5s

Load Config Set 3 into Active Set

5s

Load Config Set 4 into Active Set

 5s

Load Config Set 5 into Active Set

5s

Load Config Set 6 into Active Set

5s

Enter Config Edit Mode    5s

Save Active Set to Config Set 3 (in Config Edit Mode)

3s

Save Active Set to Config Set 4 (in Config Edit Mode)

3s

Save Active Set to Config Set 5 (in Config Edit Mode)

3s

Save Active Set to Config Set 6 (in Config Edit Mode)

3s

Exit Config Edit Mode  3s

Enter Tone Mode     5s

Display IP Address   3s

Force Boot Loader Start (on Power Up)

 5s

Reset Config to Defaults (on Power Up)

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONNECTION DETAILS

Connection Details

Headphone Output – ¼ inch (6.35mm) stereo jack socket

Tip: Left Ring: Right Sleeve: Ground

Microphone Input – Electronically balanced 3 pin female XLR-3

Pin1: Ground Pin2: Phase Pin3: Non-Phase

Headset – 5 pin female XLR-5 (microphone input is electronically balanced)

Pin1: Ground Pin2: Microphone Phase Pin3: Microphone Non-Phase Pin4: Headphone Left Pin5: Headphone Right

4-Wire Inputs – Transformer balanced 3 pin female XLR-3

Pin1: Ground Pin2: Phase Pin3: Non-Phase

Talkback Outputs – Transformer balanced 3 pin male XLR-3

Pin1: Ground Pin2: Phase Pin3: Non-Phase

IFB Inputs – Transformer balanced 3 pin female XLR-3

Pin1: Ground Pin2: Phase Pin3: Non-Phase

Microphone Output – Electronically balanced 3 pin male XLR-3

Pin1: Ground Pin2: Phase Pin3: Non-Phase

Remotes 1 – 15-way ‘D’-type socket

CM-TB8 8 Channel Talkback Control Unit User Handbook

CONNECTION DETAILS

Pin8: Channel 8 Talk active – open collector output Pin9: Group Talk active – open collector output Pin10: Loudspeaker Dim active – open collector output Pin11: Loudspeaker Mute active – open collector output Pin12: Channels 1-8 Audio Call active – open collector output Pin13: Ground Pin14: Ground Pin15: Ground

Remotes 2 – 15-way ‘D’-type socket

Loudspeaker Output – ¼ inch (6.35mm) jack socket

Tip: Speaker Positive Ring: Speaker Negative Sleeve: Ground

CM-TB8 8 Channel Talkback Control Unit User Handbook

TECHNICAL SPECIFICATION

Technical Specification

Microphone and Headset Input

Gain Range: +6dB to +69dB

Maximum Input Level: -2dBu

Frequency Response: ±0.5dB 20Hz to 15kHz at MIC output Ref. 50dB gain @ 1kHz

Filter Bandwidth: 150Hz to 5500Hz

Headphone Output

Gain Range: -80dB to +18dB

Maximum Output Level: +18dBu

Frequency Response: ±1dB 20Hz to 15kHz

4-Wire and IFB Inputs

Maximum Input Level: +18dBu

Frequency Response: ±1dB 20Hz to 15kHz

Talkback Output

Maximum Input Level: +18dBu

Frequency Response: ±1dB 20Hz to 15kHz

Noise: -85dB Average weighting

Loudspeaker

Power Output: 6W

Volume: Mute to full volume via front panel potentiometer

Dim Range: Mute to full volume via front panel preset potentiometer

Connections

Microphone: XLR-3 pin female (electronically balanced)

Headphone: ¼ inch (6.35mm) stereo jack socket

Headset: XLR-5 pin female (electronically balanced input)

4-Wire Inputs: 8 x XLR-3 pin female (transformer balanced)

IFB Inputs: 2 x XLR-3 pin female (transformer balanced)

Talkback Outputs: 8 x XLR-3 pin male (transformer balanced)

Microphone Output: XLR-3 pin male (electronically balanced)

Loudspeaker Output: ¼ inch (6.35mm) stereo jack socket

Remote Inputs: 15-way ‘D’-type socket

Remote Outputs: 15-way ‘D’-type socket

Ethernet: RJ-45, 10/100Mbps

CM-TB8 8 Channel Talkback Control Unit User Handbook

TECHNICAL SPECIFICATION

Telephone: 4 x RJ11 6/4 (2 x line, 2 x handset) CM-TB8T only

Mains Input: Universal filtered IEC, continuously rated 85-264VAC, 47-

63Hz, 25W

Fuse Rating: Anti-surge fuse 2A 20mm x 5mm

Equipment Type

CM-TB8: 8 channel talkback control unit

CM-TB8T: Add-in card with 2 x telephone hybrids

CM-TB8G: Add-in card with 2 x GSM lines

Physical Specification

Dimensions - Raw: 482mm (W) x 260mm (D) x 44mm (H)

19” (W) x 10.2” (D) x 1.7” (H)

Including Connectors: 482mm (W) x 340mm (D) x 44mm (H)

19” (W) x 13.4” (D) x 1.7” (H)

CM-TB8 8 Channel Talkback Control Unit User Handbook

CMTB8T TELEPHONE HYBRID EXPANSION CARD

CM-TB8T Introduction

The CM-TB8T is a dual PSTN, telephone hybrid expansion card. It extends the talkback capability of the unit by allowing telephone calls to be made and received on two independent analogue direct exchange or PSTN lines. Outgoing calls can be dialled directly from the unit, or from an external telephone handset connected to each of the two telephone channels. Once calls have been connected, the user can talk to each channel individually or conference 2 calls together.

The hybrids are fully configurable and are easy to setup. Simply select your location from a country code list to automatically configure the telephone interface for local line conditions. This setting also configures the relevant auto disconnect mode which can be enabled if required.

Enabling the Telephone Interface

Before the telephone expansion card can be used, it needs to be enabled. The two telephone lines are assigned to channels 1 and 2 on the CM-TB8 and they can be independently enabled using the embedded web server. See the section on page 11 for details on how to connect to the web server.

Once connected to the web server on the relevant CM-TB8, select the Channel Settings page under the Configuration tab. Channels 1 and 2 will have a new “Enable – PSTN Telephone Expansion Fitted” option available as shown below.

Fig 12-1: Channel Settings Page

CM-TB8 8 Channel Talkback Control Unit User Handbook

CMTB8T TELEPHONE HYBRID EXPANSION CARD

CMTB8T TELEPHONE HYBRID

EXPANSION CARD

Selecting this option will enable the telephone hybrid for the selected channel. The required channel must be connected to an analogue direct exchange line or PSTN line via the rear panel mounted RJ11 connector. An optional telephone handset can also be connected to the RJ11 handset connector. The telephone interface is not accessible unless a valid telephone line connection is made.

Once the telephone interface has been enabled, the relevant country code setting should be selected in the PSTN Settings page. This ensures that all telephone approval parameters are met for operation of this unit in various parts of the world.

Making a Telephone Call

A telephone call can be made using an external telephone handset, or directly by dialling one of the stored numbers.

Direct Dialling

The CM-TB8 can store 8 telephone numbers for direct dialling. These are entered using the embedded web server. To dial a stored number, press and hold the rotary control and then briefly press the talk button of the required channel, either 1 or 2. The rotary control can then be released. The talk buttons on channels 1 to 8 will illuminate amber if a valid telephone number has been entered in the corresponding telephone number edit on the PSTN page of the web server. For example, if telephone numbers have previously been entered in positions 4 and 7, then only the talk buttons on channels 4 and 7 will illuminate.

To dial the number, press one of the illuminated talk buttons. If no button is pressed within 3 seconds, the unit reverts to its previous state and the direct dialling mode is cancelled. When a valid number is selected, the unit will connect to the telephone line and dial the number and the corresponding talk button will illuminate amber. The audio on the telephone line can be monitored on the headphone/headset and loudspeaker outputs at the level set by the channels own monitor level potentiometer.

Dialling Using an External Telephone Handset

Simply lift the receiver and dial the required number. The talk button on the corresponding channel will fast flash amber to indicate the handset is off hook. The talk button can be pressed to open the telephone line connection to the CM-TB8 in parallel with the handset if required. The talk button will then illuminate amber and the audio on the telephone line can be monitored on the headphone/headset and loudspeaker outputs at the level set by the channels own monitor level potentiometer.

Receiving a Telephone Call

An incoming telephone call will cause the talk button on the corresponding channel to flash in the cadence pattern of the ring signal. If an external telephone handset is connected, this will ring in the normal way. The call can be answered by either pressing the talk button or lifting the handset. If the handset is used to answer the call, the talk button will fast flash amber to indicate the handset is off hook. If the handset is replaced prior to the talk button being pressed, the call is dropped. If the talk button is pressed, the CM-TB8 is connected to the telephone line and the talk button will illuminate amber.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CMTB8T TELEPHONE HYBRID EXPANSION CARD

The telephone enabled channel can also be configured to automatically answer an incoming telephone call. This is done in the PSTN settings page of the embedded web server. If enabled, the call will be answered after 2 rings. For double cadence ring tones, both rings in the cadence pattern will be counted.

Handling a Connected Telephone Call

Once a telephone call is connected to the unit, the talk button on the corresponding channel illuminates amber. The channels audio call indication illuminates the talk button green when the signal from the telephone line rises above -12dB. The routing of audio through a telephone enabled channel depends on the selection of the IFB/4W switch.

To use a connected telephone channel in 4W mode: put the IFB/4W switch in the 4W position. In this mode, the signal from the connected telephone call is routed to the headphones/headset and loudspeaker at the level set by the channels own monitor level potentiometer, with the overall level controlled by the MON level potentiometer. The signal is also routed to the talkback output at the TB OUT connector. When the talk button is pressed, the microphone signal is routed to the telephone line, and the level of the feed to the loudspeaker (not headphones/headset) is reduced by the level preset by the dim potentiometer. The channels 4W input is not used in this mode.

To use a connected telephone channel in IFB mode: put the IFB/4W switch in the IFB position. In this mode, the signal from the connected telephone call is routed to the headphones/headset and loudspeaker at the level set by the channels own monitor level potentiometer, with the overall level controlled by the MON level potentiometer. The signal is also routed to the talkback output at the TB OUT connector. The signal form the selected IFB input, either the channels own 4W IN input or one of the dedicated programme inputs, IFB A or IFB, is routed to the telephone line. When the talk button is pressed, the signal routed to the connected telephone line is either replaced by or mixed with the microphone signal, and the level of the feed to the loudspeaker (not headphones/headset) is reduced by the level preset by the dim potentiometer.

Once a telephone enabled talk channel is active, the corresponding talk button illuminates red and the handset is automatically disconnected from the telephone line.

Ending a Telephone Call

To end a telephone call, briefly press the channels talk button whilst holding the rotary control. If an external handset is still off hook, the line will not disconnect from it. The handset must be replaced to fully clear the line.

The telephone enabled channel can also be configured to automatically disconnect a telephone call when the predefined line conditions or disconnect tone are detected. These conditions are defined as part of the selected country code settings and do not need to be configured separately. An option to enable auto disconnect is in the PSTN settings page of the embedded web server.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CMTB8T TELEPHONE HYBRID EXPANSION CARD

CMTB8T TELEPHONE HYBRID

EXPANSION CARD

Embedded Web Server

When the PSTN telephone expansion card is fitted, an additional web page is available for configuring related settings. The PSTN Settings page appears under the Configuration tab.

PSTN Settings Page

Fig 12-2: PSTN Settings Page

Telephone Numbers 1-8: The CM-TB8 can stored up to 8 telephone numbers that can be accessed by both of the telephone interface channels.

Enable Call Signal: When an external caller is ringing one of the telephone interface channels, this option routes an internally generated call signal to the monitor headphones/ headset and loudspeaker. The signal matches the cadence pattern of the ring signal.

Auto Answer: This option automatically answers an incoming telephone call after 2 rings. For double cadence ring tones, both rings in the cadence pattern are counted.

Auto Disconnect: This option enables automatic call disconnection. K-break, line polarity reversal and dial tone disconnect modes are supported. The auto disconnect mode is defined by the country code selection.

Receive Gain: This trim control adjust the level of the signal from the telephone line in 3dB increments from -6dB to +6dB.

Transmit Gain: This trim control adjust the level of the signal routed to the telephone line in 3dB increments from -6dB to +6dB.

CM-TB8 8 Channel Talkback Control Unit User Handbook

CMTB8T TELEPHONE HYBRID EXPANSION CARD

Country Code Setting: This setting configures the telephone interface in the CM-TB8 for the selected country or equipment type. It ensures that all telephone approval parameters are met for operation in various parts of the world.

Edit Settings: This option shows the current telephone interface parameters and allows them to be set manually. This is not required for normal operation and should only be done with settings provided by Sonifex Ltd. Modifying these parameters could make the telephone interface unstable.

PSTN Telephone Interface Connection Details

Telephone Line – RJ11 Socket

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 correct operation.

Telephone Handset – RJ11 Socket

The connection details are the same as for the telephone line connector.

CM-TB8 8 Channel Talkback Control Unit User Handbook

NOTES

www.sonifex.co.uk

t:+44 (0)1933 650 700 f:+44 (0)1933 650 726 sales@sonifex.co.uk

Sonifex CM-TB8 User Handbook Manual

Specifications and Main Features

Frequently Asked Questions

User Manual