Telos TWOx12 User Manual

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TELOS TWOx12

Advanced All Digital Dual Hybrid Multiline Broadcast Telephone System

USER’S MANUAL

Manual Version 1.0.1 for software version 1.0.1 and later

24 May, 2000

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Customer Service

We support you...

By phone/Fax in the USA.

Customer service is available from 9:30 AM to 6:00 PM USA Eastern Time, Monday through Friday at +1 216.241.7225. We’re often here at times outside of these, as well – please feel free to try at any time! Fax: +1 216.241.4103.

By phone/Fax in Europe.

Service is available from Telos Europe in Germany at +49 81 61 42 467. Fax: +49 81 61 42 402.

By E-Mail.

The address is: [email protected].

Via World Wide Web.

The Telos Web site has a variety of information which may be useful for product selection. The URL is: http://www.telos-systems.com.

Feedback

We welcome feedback on any aspect of the Telos TWOx12 or this manual. In the past, many good ideas from users have made their way into software revisions or new products. Please contact us with your comments.

Telos Systems

2101 Superior Avenue

Cleveland, OH 44114

USA

+1 (216) 241-7225

Fax: +1 (216) 241-4103

Telos Europe

Johannisstra ββββe 6

85354 Freising

Germany

+49 81 61 42 467

Fax: +49 81 61 42 402

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Updates

The operation of the Telos TWOx12 is determined almost entirely by software. A continuous program of improvement is underway. Contact us to determine if a newer release is more suitable to your needs.

Trademarks

Telos Systems, the Telos logo, TWO, TWOx12, and System 2101 are trademarks of TLS Corporation. All other trademarks are the property of their respective holders.

Copyright © 1994-2000 by TLS Corporation. Published by Telos Systems, who reserves the right to make improvements or changes in the products described in this manual, which may affect the product specifications, or to revise the manual without notice. All rights reserved.

Notice

All versions, claims of compatibility, trademarks, etc. of hardware and software products not made by Telos mentioned in this manual or accompanying material are informational only. Telos Systems makes no endorsement of any particular product for any purpose, nor claims any responsibility for operation or accuracy.

Warranty

Service

This product is covered by a one year limited warranty, the full text of which is included in the section 10 of this manual.

You must contact Telos before returning any equipment for factory service. Telos Systems will issue a Return Authorization number which must be written on the exterior of your shipping container. Please do not include cables or accessories unless specifically requested by the technical support engineer at Telos. Be sure to adequately insure your shipment for its replacement value. Packages without proper authorization may be refused. US customers please contact Telos technical support at +1 (216) 241-7225. All other customers should contact your local representative to make arrangements for service.

III

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Notices and Cautions

Notices and CautionsNotices and Cautions

CAUTION:

THE INSTALLATION AND SERVICING INSTRUCTIONS IN THIS MANUAL ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS

YOU ARE QUALIFIED TO DO SO. REFER ALL SERVICING TO QUALIFIED PERSONNEL.

WARNING:

TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. DO NOT SHOWER WITH THE UNIT.

This symbol, wherever it appears, alerts you to the presence of uninsulated, dangerous voltage inside the enclosure – voltage which may be sufficient to constitute a risk of shock.

This symbol, wherever it appears, alerts you to important operating and maintenance instructions. Read the manual.

TO PREVENT RISKS OF

ELECTRIC SHOCK,

DISCONNECT POWER

CORD BEFORE SERVICING

USA CLASS A COMPUTING DEVICE INFORMATION TO USER. WARNING:

equipment generates, uses, and can radiate radio-frequency energy. If it is not installed and used as directed by this manual, it may cause interference to radio communication. This equipment complies with the limits for a Class A computing device, as specified by FCC Rules, Part 15, Subpart J, which are designed to provide reasonable protection against such interference when this type of equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference. If it does, the user will be

required to eliminate the interference at the user’s expense. to TV or radio reception can occur if other devices are connected to this device without the use of shielded interconnect cables. FCC rules require the use of only shielded cables.

NOTE:

Objectionable interference

This

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CANADA WARNING: “

noise emissions set out in the Radio Interference Regulations of the Canadian Department of Communications.” “Le present appareil numerique n’emet pas de bruits radioelectriques depassant les limites applicables aux appareils numeriques (de les Class A) prescrites dans le Reglement sur le brouillage radioelectrique edicte par le ministere des Communications du Canada.”

This digital apparatus does not exceed the Class A limits for radio

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Customer Service........................................................................................................................................................ ii

Conventions used in this manu al............................................................................................................................... xi

1 INTRODUCTION........................................................................................................1

1.1 System overview- What is this TWOx 12 Anyway?................................................................................ 1

1.2 Features and Benefits of the TWOx12 System........................................................................................ 1

1.3 Why ISDN Makes Sense for Broadcast Talk Show Systems................................................................ 2

2 INSTALLATION......................................................................................................7

2.1 Getting Started............................................................................................................................................. 7

System Configuration –........................................................................................................................ 8

Identifying your TWOx12 system – Analog or Digital?....................................................................9

2.2 Installation checklist (Copy this checklist and use it to help organize your installation)..11

2.3 ISDN Technology 101................................................................................................................................13

2.4 Ordering ISDN – an introduction...........................................................................................................14

2.5 Connections to the Telco circuits.............................................................................................................17

Introduction – Choices........................................................................................................................ 17

2.5.1 Connecting the Telos TW Ox12 t o ISD N).......................................................................................... 18

ISDN in USA & Canada: Using the U Interf ace............................................................................... 20

ISDN Worldwide (outside the USA & Canada): The S/T Interface............................................22

2.5.2 Integration with a PBX using ISDN................................................................................................... 24

2.5.3 Connecting the TWOx12 to POTS (Plain Old Telephone Service)...............................................25

2.5.4 Mixed ISDN/Analog Configurations.................................................................................................. 27

2.6 Studio Audio Connections........................................................................................................................ 30

2.6.1 Mix-Minus..............................................................................................................................................30

What is a mix-minus?......................................................................................................................... 30

Why do I need a mix-m inus?..............................................................................................................32

More on Mix-Minus............................................................................................................................32

Phones and Remotes........................................................................................................................... 34

2.6.2 Input- (To Caller ) Left & Right Analog Audio................................................................................. 35

2.6.3 POH (Program on Hold) Input...........................................................................................................36

2.6.4 Output – (Caller ) Left & Right Audio................................................................................................ 37

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2.6.5 AES/EBU Digital Audio In/Out...........................................................................................................37

2.7 Desktop Director Connections.................................................................................................................38

Wiring Configurations for the Des ktop Director...............................................................................41

Multiple Desktop Directors on a single port...................................................................................... 42

Desktop Director Assembly................................................................................................................44

2.8 AC (mains) Power......................................................................................................................................45

2.9 Remote Control Ports................................................................................................................................46

2.9.1 Parallel Remote Control...................................................................................................................... 46

2.9.2 Special Auxiliary Access ports............................................................................................................ 49

2.9.3 RS-232 Serial Remote Control............................................................................................................49

2.9.4 Ethernet Remote Control..................................................................................................................... 51

3 GETTING UP & GOING –SYSTEM CONFIGURATION.....................................53

3.1 System programming ............................................................................................................................... 53

System Programming Check list......................................................................................................... 54

3.2 Initial Installation.......................................................................................................................................57

3.3 ISDN Setup (if you ordered an analog TWOx12 see section 3.4)............................................. 57

Worldwide ISDN Setup (outside USA & Canada):........................................................................ 58

USA & Canada ISDN Setup ........................................................................................................... 59

3.4 Analog phone line setup (If you ordered an ISDN TWOx12 see section 3.3)...........................62

3.5 Is the ISDN working?................................................................................................................................ 62

3.6 Levels, Levels, Levels.................................................................................................................................64

3.7 Time to test it out!......................................................................................................................................65

What now?...........................................................................................................................................67

4 DESKTOP DIRECTOR™- GENERAL OPERA TION.........................................69

4.1 General Description................................................................................................................................... 69

4.2 Status Symbol ™ Icons & What They Mean........................................................................................69

4.3 Buttons......................................................................................................................................................... 71

Line Control Button s...........................................................................................................................72

Telephone Mode Buttons....................................................................................................................73

User Function Buttons and LEDs –....................................................................................................74

4.4 Desktop Director LCD Screen & Menu Navigation Buttons..............................................................75

VII

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4.4.1 Menu Navigation...................................................................................................................................75

4.4.2 Changing from Producer to Talent mode..........................................................................................75

4.4.3 Volume Menus....................................................................................................................................... 76

5 TELOS DESKTOP DIRECTOR™ - GUIDE FOR CA LL SCREENERS.............79

5.1 General Description................................................................................................................................... 79

5.2 Status Symbol ™ Icons & What They Mean........................................................................................79

5.3 Buttons......................................................................................................................................................... 82

5.3.1 Line Control Buttons............................................................................................................................82

5.3.2 Telephone Mode Buttons ..................................................................................................................... 84

5.3.3 User Function Buttons and LEDs –.................................................................................................... 84

5.4 Desktop Director LCD Screen & Menu Navigation Buttons..............................................................84

5.4.1 Menu Navigation...................................................................................................................................85

5.4.2 Changing from Talent to Producer mode..........................................................................................85

5.4.3 Volume Menus....................................................................................................................................... 86

6 TELOS DESKTOP DIRECTOR™- GUIDE FOR TA LENT.................................89

6.1 Introduction to the Desktop Director..................................................................................................... 89

6.2 STATUS SYMBOL™ ICONS & WHAT THEY MEAN..................................................................90

6.3 DESKTOP DIRECTOR™ DISPLAY OPERATION- Talent Mode...............................................92

6.3.1 LCD display screen and menu navigation buttons............................................................................... 92

6.3.2 Volume Menus ...........................................................................................................................................93

6.4 DESKTOP DIRECTOR™ BUTTONS.................................................................................................94

6.4.1 Line buttons-...........................................................................................................................................94

6.4.2 PLACING CALLERS ON-AIR – Single caller................................................................................96

6.4.3 PLACING MULTIPLE CALLERS ON-AIR – Using lock mode................................................97

6.4.4 DROPPING CALLS OFF AIR.......................................................................................................... 98

6.5 USING AS A TELEPHONE....................................................................................................................98

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7 DETAILED CONFIGURATION & REFERENCE.................................................99

7.1 Level Metering ......................................................................................................................................... 101

7.2 Status Displays..........................................................................................................................................103

7.3 Advanced: Setting the TWOx12’s Configuration...............................................................................103

7.3.1 The Audio Menu..................................................................................................................................106

7.3.2 The Tel Menu......................................................................................................................................116

7.3.3 The System Menu................................................................................................................................122

7.4 Remote Control........................................................................................................................................127

7.4.1 RS-232 Control....................................................................................................................................127

7.4.2 Ethernet 10Base-T control.................................................................................................................137

7.5 System Audio Processing and Feedback Control...............................................................................138

7.5.1 Send Audio Processing........................................................................................................................138

7.5.2 Receive (Caller) Audio Processing....................................................................................................139

7.5.3 Duplex “Ducking” System.................................................................................................................141

7.5.4 Feedback Control................................................................................................................................141

8 TECHNICAL DATA AND TROUBLESHOOTING............................................143

8.1 Overview...................................................................................................................................................143

8.2 System Firmware..................................................................................................................................... 143

Viewing Version Information...........................................................................................................143

Replacing firmware...........................................................................................................................144

8.3 General Troubleshooting........................................................................................................................ 145

The Debug Status Screens................................................................................................................ 147

Using Loop Modes for Troubl eshoot ing ..........................................................................................148

8.4 Troubleshooting ISDN Problems..........................................................................................................148

8.5 Troubleshooting Desktop Director Problems......................................................................................152

8.6 Gaining Access ......................................................................................................................................... 152

8.7 ISDN Cause Phrases/Values...................................................................................................................154

9 SPECIFICATIONS..............................................................................................163

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10 WARRANTY AND APPLICATION CAUTION..................................................165

11 APPENDICES.....................................................................................................167

11.1 Appendix 1 – Known Working SPID Formats by Telephone com pany.........................................167

11.2 Appendix 2 – Cable Guide......................................................................................................................169

Call Director to 2X12 Cable Pinout.................................................................................................171

Standard 10Base-T Ethernet Cable Pin out......................................................................................171

ISDN S Interface Cable Pinout.........................................................................................................172

11.3 Appendix 3 – Telephone Tech nology in the Di gital Age T utori al.................................................... 175

11.4 Appendix 4 - Glossary of useful ISDN and Telephone Terminology..............................................188

11.5 Appendix 5 - Suggested Reading...........................................................................................................200

ISDN..................................................................................................................................................201

Telephony..........................................................................................................................................201

Other..................................................................................................................................................201

11.6 Appendix 6 - ISDN BRI Ordering Guide for ETS 300 (E uro-ISDN).............................................. 202

Details, Details ..................................................................................................................................202

11.7 Appendix 7 - ISDN BRI Ordering Guide for USA & Canada.........................................................205

Ordering ISDN..................................................................................................................................205

Details, Details ..................................................................................................................................206

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Conventions used in this manual

The following symbols are used throughout this manual to highlight various type of information contained within.

DANGER!

This information is important to safe operation of the equipment and warns of possible hazards. For you safety you should read these.

IMPORTANT!

This information is essential to getting the TWOx12 to work, or prevent damage to it. To avoid headaches read these.

HOT TIP!

This information will probably come in handy at some point. You will probably wish to read these.

ISDN TIP!

Important information about ISDN. This is recommended reading for all ISDN users.

MIX- MINUS TIP!

Information useful when configuring your send- to- caller Mix- Minus feeds.

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DEEP TECH NOTE!

Amaze your technical friends with your voluminous knowledge of the TWOX12, ISDN, and hybrid technology! Not necessary for the ability to install and use the TWOx12, but this information might come in handy if you ever need to troubleshoot the system.

CURIOSITY NOTE!

Amaze your friends with your grasp of ISDN and Hybrid trivia. Not necessary for the ability to install and operate the TWOx12.

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TELOS TWOX12 USER’S MANUAL

1 INTRODUCTION

1.1 System overview- What is this TWOx12 Anyway?

The Telos TWOx12 is designed for small and medium market stations where up to 12 incoming talk lines are required. It is also well suited to dedicated studios within larger facilities. Depending on the version ordered, the TWOx12 can utilize 6 ISDN BRI circuits (with 2 channels or “Lines” per circuit) or 12 “POTS” (plain old telephone service) analog lines, or certain mixtures of the two types. We recommend ISDN BRI circuits whenever possible. Contrary to the perceptions of some, ISDN is widely available and installation generally goes smoothly (this was not always true; however our extensive experience with the Zephyr and ZephyrExpress codecs have proven to us that this technology is mature). Follow the advice in this manual about ordering ISDN and the process should go smoothly (see the Appendix for ISDN Order forms).

For those who do not need the added quality available on ISDN, or cannot get ISDN lines, we offer the POTS version for use on analog telephone lines. This version offers the only available upgrade path from Analog to ISDN in any broadcast telephone system today. You can get the flexibility of the system now. ISDN or POTS, you can make the choice today without throwing away your investment tomorrow- simply plug in new interface cards to upgrade from POTS to ISDN!

At the heart of any broadcast system are the hybrids used. Based on the Telos TWO dual hybrid, the TWOx12 includes simply the best broadcast hybrids made. With a trans-hybrid loss of well over 70dB (when used on digital lines) it allows for the best possible announcer audio over the air. Performance when used with open speakers and in teleconferencing applications is also superb.

The TWOx12 combines the TWO’s dual hybrid design with a twelve line system controller and support for up to two (expandable to four) Telos Desktop Direc to r control surfaces - typically one for a phone screener and one for talent. Each Desktop Director can be easily reconfigured between the talent and producer (screener) modes of operation. The Desktop Director has an intuitive user interface and we are confident your staff will take to the system in no time.

If it sounds like we are proud of this system, you are right!

1.2

1.2 Features and Benefits of the TWOx12 System

1.21.2

Telos products have earned a reputation for ease of use and outstanding performance, and the Telos TWOx12 lives up to that reputation. Our advanced ISDN hybrid technology comprises an integrated suite of audio processing functions to achieve unsurpassed audio quality.

Studio-grade 20-bit A-to-D conversion, combined with noise gating and shaping, guarantees crystalline audio to the POTS lines and significantly improved send levels.

Simultaneous analog and AES/EBU outputs.

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TELOS TWOX12 USER’S MANUAL

Automatic high-precision sample rate conversion for incoming ISDN circuits.

Unmatched Send/Receive sep ara ti on using Telos ’ ti me -te st ed Adap tiv e Cancellation technology. Each hybrid automatically & continuously adjusts to phone line conditions, virtually eliminating the hollowness, feedback and distortion that occurs when send audio “leaks” into the caller output signal.

Sophisticated AGC/limiting functions and three-band Digital Dynamic Equalization (DDEQ) ensure consistent caller audio levels and spectral consistency.

Easy to use menus. Full metering for proper setup and operation.

Caller ID support and fully adjustable Caller Ducking (override) helps hosts stay in control.

Conference linking ability lets you set up high-quality conferencing between callers with no external equipment needed. (Only a single mix-minus is required.)

Flexible system architecture allows you to buy an analog system now and upgrade to ISDN in the future.

1.3 Why ISDN Makes Sense for Broadcast Talk Show Systems

ISDN is widely available, cost-effective, and offers many advantages for studio systems. It is yet another example of digital technology enhancing broadcast operations.

Integrated Services Digital Network (ISDN) is a set of international standards for digital transmission over ordinary telephone copper wire (as well as over other media). Presently, the dial-up telephone network is nearly entirely digital, except for the “last mile” copper connections from the Central Office (Exchange) to the customer’s site. Telos’ new ISDN hybrids take advantage of this technology to deliver crystal clear caller audio to the radio studio.

Even though it takes two separate circuits — one send and one receive ci rcu it — to transmit telephone audio, traditional analog lines multiplex both circuits in order to use a single pair of wires. This causes what’s referred to as “leakage” – when the announcer’s audio is present on the hybrid output, creating an annoying “hollow” or “tinny” sound. A “four-wire” circuit has two wire pairs, and therefore two independent audio paths. Digital circuits are designed to always offer independent and separated signal paths. (Though a digital circuit may today not use wires at all, but rather fiber, or microwave radio, or satellite, telephone engineers, bowing to tradition, continue to refer to all separated speech paths as being “four-wire.”)

The telephone network routes calls over 64 kbps channels. A sampling rate of 8 kHz is used, with a word length of 8 bits. The 8 kHz sampling rate supports a Nyquist (audio cut-off) frequency of 4 kHz. In practice, telephone systems are designed to have audio frequency response extending to 3.4 kHz in order to allow relatively simple roll-off filters to be used.

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TELOS TWOX12 USER’S MANUAL

CURIOSITY NOTE!

The word length is what determines dynamic range–and 8 bits would only permit 48 dB were it used in standard PCM linear fashion. A primitive kind of compression is used to stretch the dynamic range: µLaw in North America and much of Asia, and Alaw in Europe. This is a scheme that equalizes the step- size in dB terms across the dynamic range–a smaller step- size on low- level signals reduces quantization noise and improves effective dynamic range to the equivalent of about 13 bits. The Telos TWOx12 automatically uses the appropriate method depending upon the ISDN protocol setting.

While the application of digital signal process ing to the prob le m of separa ti ng host and caller audio – pioneered by Telos and used in all of our telephone interfaces – has made a dramatic improvement over pure analog syst e ms, usin g digital phone lines for incoming calls further improves performance for several reasons:

ISDN Lines are I nhe rentl y “4 -wi re”

Analog lines use a single pair of wires for both signal directions, mixing the send and caller audio. This causes the “leakage” problem–where the announcer’s audio is present on the hybrid output, where we desire that there only be caller audio. A “4wire” circuit has two wire pairs, and therefore two independent audio paths. Digital circuits inherently offer independent and separated signal paths because it is not possible to have bits moving in both directions without separating them somehow. (Though a digital circuit may today not use wires at all, but rather fiber, microwave radio, or satellite, telephone engineers, bowing to tradition, continue to refer to all separated speech paths as being “4-wire.”)

While the application of DSP to the problem of separating the signals–used in digital hybrid interfaces–has made a dramatic improvement over analog systems, ISDN enables yet further improved performance.

Better Digital-Analo g Conve rsion Qual ity

The analog-digital conversion chips used in telephone central offices are poor compared to the converters used in professional audio equipment. Fidelity is not an important consideration when most Telco equipment designers choose parts for this function. In a professional interfa ce for stu dio appl ic at ions such as the TWOx12, we can afford to design-in much better converters than available in the Telephone Company’s equipment. Noise-shaping functions permit a larger word-length converter to provide significantly better distortion and signal-to-noise performance.

Since we are handling the conversion, we can encode at higher levels without concern about regulations designed to prevent crosstalk on analog lines, resulting in improved send-to-caller levels.

In all-digital installati ons, the te lepho ne int erf ace can ma int ain a digita l path all the way. AES/EBU is included in the hybrid to accomplish the connection to digital studio gear.

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INTRODUCTION

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TELOS TWOX12 USER’S MANUAL

Lower Noise

Because they are digital circuits, ISDN lines are not susceptible to induced noise. Analog lines are exposed to a variety of noise and impulse trouble-causers as they move across town on poles and through your building. Hum is the main one, given most line’s proximity to pole transformers and power lines, but there are also sources of impulse noise from motors, switches, and other sources. Digital lines convey the bits precisely and accurately from the network to your studio equipment without any perturbation–so the audio remains clean. Even when the caller is using an analog phone line to call in, the noticeably quieter digital connection between the hybrid and the telephone network helps the hybrid achieve better rejection of outgoing audio leakage.

Call Setup and S upe rvi sion are Bet te r

Analog lines use a strange mix of signaling to convey call status. Loop current drop and returned dial-tone signal that a far-end caller has disconnected; blasts of 100 volts at 20 Hz mean someone wants you to answer. Why should we be using a mechanism designed to bang a hammer against a metal bell to transmit network status information into the 21 controlling calls and conveying status information about them. The sophisticated transactions on the D channel are able to keep both ends of a call accurately informed about what is happening.

For starters, ISDN call set-up times are often only a few 10’s of milli-seconds, enhancing production of a fast-paced show. Perhaps more importantly, when a caller disconnects while waiting on hold, the ISDN channel communicates this status change instantly. This contrasts with the usual 11-second delay on most analog lines. One of the most common complaints of talk hosts is that they go to a line where they expect a caller to be waiting, only to be met with a blaring, annoying dial tone. The chance of this happening with an ISDN line is nearly zero.

Century? ISDN uses a modern digital approach to

Another common error is the condition where a talent punches-up a line that looks free, but which actually is just about to begin ringing and connects to a surprised caller. This condition, called glare, results from the delay in the ring signaling, which comes from the nature of the analog line’s ringing cadence. This is much less likely with ISDN because it eliminates the ambiguous statu s period.

CURIOSITY NOTE!

We don’t know why the condition of picking up a line which was about to ring and getting an incoming call instead of dial tone is called “Glare”. Perhaps its because the looks air staff give engineers when this happens too often!

If you find out, be sure to let us know!

Higher Gain and Re du ced F eedb a ck Durin g M ulti - line C onfe ren ci ng

Higher Gain and Reduced Feedback During Multi-line Conferencing. When conferencing is required on 2-wire circuits, very good hybrids are needed to separate

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TELOS TWOX12 USER’S MANUAL

the two audio paths in order to add gain in each direction. When the gain around the loop exceeds unity, the unpleasant result is feedback. Since the conference path usually includes four AGC functions, the hybrid must be sufficiently good to cover the additional gain that may be dynamically inserted by these AGC’s.

Because of the 4-wire nature of digital telephone lines, the hybrid function is more effective–and more reliably so across a variety of calls. That means more gain can be inserted between calls before feedback becomes a problem.

Better Line Monit o ring , Call Setu p a nd Super vi sion .

Since there is a full-time connection between the central office and the terminal on the D channel, it is possible to detect when a line is a not working. On an analog line, one discovers a problem only from a failed attempt to use the line. Many digital phone lines maintain a full-time connection between the Central Office and your studio on the “D” channel, so you can quickly detect when a line is a not working.

Furthermore, the sophisticated transactions on the “D” channel keep both ends of a call accurately informed about line status. For starters, digital lines feature call set-up times of only a few milliseconds, enhancing production of a fast-paced show. Perhaps more importantly, when a caller disconnects while waiting on hold, this status change is communicated instantly (contrasted with the usual 11-second delay on most analog lines). One of the most common complaints of talk hosts is that they go to a line where they expect a caller to be waiting, only to be met with a blaring, annoying dial tone. The chance of this happening with a digital line is near zero.

Elimination of A -to-D & D -to -A conv ersion s.

The analog-digital conversion equipment used in telephone central offices is of poor quality compared to the converters used in professional audio equipment. Using a digital phone line enables you to maintain a digit al path al l the way from the cal le r’s central office to your studio equipment — requiring only the initial conversion to digital, and doing away with the need to reconvert from digital to analog audio. AES/EBU outputs are provided on TWOx12 Talk Show System to help accomplish this direct connection to digital studio gear.

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TELOS TWOX12 USER’S MANUAL

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INTRODUCTION

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2 INSTALLATION

2.1 Getting Started

In this chapter we will cover the various input/output connections of the TWOx12 and what you need to know to install the system. We also give you a brief introduction to ISDN in section 2.3 since some users may not be familiar with it. Later, in section 3, we will cover the steps necessary to configure the unit for initial operation and test it. Section 7 has a detailed reference of all menus.

The Telos TWOx12 mounts in a 2RU high space in a standard 19” rack. You do not need to pay special attention to cooling or ventilation, as the unit will operate in any environment where humans would be comfortable. The unit will operate on any commonly available AC mains voltage between 90 and 240 volts 50 – 60 Hz. You will want to mount the unit in a position convenient for cable access for the ISDN lines and audio connections.

Next, you will need to:

• *Order or confirm availability of appropriate ISDN BRI lines

• Connect the Telco circuits

TELOS TWOX12 USER’S MANUAL

• Connect audio, via either analog or digital AES/EBU

• Connect 1 or more Desktop Directors (control surfaces)

• Connect to power

• Connect to LAN (local area network), if Call Screen Manager 2.0 is to be used

• *Configure the TWOx12 to match your ISDN lines

• Configure the built in hybrids’ audio characteristics for the requirements of your

installation

• Test to confirm proper operation

* This step can be skipped if analog (POTS) tele phone lines are used.

IMPORTANT!

This manual goes into detail about ordering & using ISDN, and programming information into the unit about your ISDN lines. If you purchased the POTS (analog) version of the TWOx12 you can disregard that information.

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INSTALLATIO N

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Since ISDN will be new to many users, sections 2.3 & 2.4 give an introduction to the technology. If you are using analog telephone lines (POTS) you can skip those sections if you wish.

As you read through this chapter connect your inputs and outputs. In section 3 we will proceed with detailed system configuration issues.

System Configuration –

A “maxed out” TWOx12 includes the following:

4 Desktop Call Directors

6 ISDN BRI circuits (with 2 callers per BRI circuit)

OR, depending on the version ordered,

12 POTS analog telephone circuits (loop start)

1 dual channel AES/EBU send-to-caller digital mix-minus source

2 send-to-caller analog mix-minus source(s)

1 dual channel AES/EBU Caller output

AND/OR

2 Analog caller outputs

1 program on hold analog source

TELOS TWOX12 USER’S MANUAL

Note that there are several configuration choices that you will be making in order to install the system in a given facility. A diagram of the TWOx12’s inputs and outputs follows.

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TELOS TWOX12 USER’S MANUAL

CONTRO

BLOCK

SEND

to Caller

(AES)

1&2

to Caller (Analog)

SEND to Caller (Analog)

SEND

CALLER

Out

(Analog)

INTEGRA

TELOS

TWO

HYBRID

CALLER

Out

(Analog)

CALLE

Out

(AES)

1&2

Program

on Hold

Source

TELCO

INTERFAC

MATRIX

BLOCK

TWOx12 Telephone Interfac

KEY

Data

ISDN BR

Analog Audio

AES/EBU Audi

ISDN

(PSTN)

Ethernet 10 base-T WAN/LAN

Connection for Assistant Produce

and remote control

Parallel Outputs (Status &

Control) and Remote control

The input & output ports of the TWOx12 system.

Note that the system can easily be expanded to support up to four Desktop Directors™; Only one

of the input options (AES/EBU or Analog) can be selected at a given time; POTS TWOx12

systems substitute 12 analog POTS circuits for the ISDN circuits shown above.

Identifying your TWOx12 system – Analog or Digital?

You will need to identify whether your system is a POTS (Plain Old Telephone Service analog) or an ISDN version, since we will cover them separately in the following instructions. If you are installing a mixed system you should read through both sets of instructions. Towards the end of this section (section 2.5.4) we will specifically address mixed POTS/ISDN systems.

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Analog TWOx12 version

The Analog version of the TWOx12 has Telco interface cards in slots A, B, C, & D. Each interface

supports three analog telephone circuits using standard RJ-11 style jacks.

ISDN TWOx12 version

The ISDN version of the TWOx12 has Telco interface cards in slots A, B, & C. Each interface

supports two ISDN BRI circuits. Since each BRI has two telco channels (or “Lines”) there are 4

channels per BRI interface card. Connection may be either RJ-45 or RJ-11 style depending on the

country.

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2.2 Installation checklist (Copy this che cklist and use it to help organize your installation)

We suggest you look through the rest of section 2 before proceeding. Then work through this checklist as you prepare to install the TWOx12.

Will a PBX be used in conjunction with the TWOx12 installation?

Configure BRI ports on PBX. See section 2.5.2 and your

PBX vendor.

Bring ISDN BRI circuits to the location where the TWOx12 will located. 1 pair for each ISDN U interface (USA and Canada) or 2 pair for the ISDN S interface (Worldwide). See section 2.5 for details.

How many mix-minuses (wi th se nd-to-c alle r audi o) wil l be used ? See “Ro uting”

210in section 7.3.1 (routing) fo r mor e on m ix-min uses.

##$ If no mix-minus is available see information on feed thru mode in section

7.3.1. Note: Your program audio will pass through the TWOx12 in this case.

$ If only a single mix-minus will be available see “Routing” in section 7.3.1.

Bring 1 or 2 mix-minus audio feeds (AES/EBU, or –7 to +8 dB u an alog) f rom your

# console to the TWOx12.

How many inputs on the console will be used?

# $ If only a single feed from the TWOx12 to the console will be used see

“Routing” in section 7.3.1 for information on your options. Bring 1 or 2 of the Output (Caller) signals from the TWOx12 to your console.

Run one of the supplied Desktop Director cables from the TWOx12 to each of

# the locations where the Desktop Directors will be located. See section 2.7.

If more than two Desktop Directors will be used see section 2.7.

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If you will be using Assistant Producer 2.0 or any of the

# TWOx12’s remote input/output options to control the unit from

another device see section 2.9 and make those connections now.

Proceed to System Programming Checklist in section 3.

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2.3 ISDN Technology 101

This section offers an introduction to ISDN service. This introduction should be useful to help you understand how to order ISDN, and use it with the TWOx12. If you are familiar with ISDN you can skip to section 2.5.

ISDN lines come in two varieties: Basic Rate Interface (called BRI, SØ, or ISDN 2 in various parts of the world)) and Primary Rate Interface (PRI, S2 or ISDN 30). BRI lines are the kind we normally see in broadcast stations, as these are what are used with MPEG codecs such as the Telos Zephyr and ZephyrExpress. BRIs have a capability of one or two active 64 kbps channels. Since the Telos TWOx12 is used with BRI lines, we will only consider that type here.

TELOS TWOX12 USER’S MANUAL

ISDN BRI Multiplexes three bi-directional channels on a single pair of copper

wires

Alphabet Soup: U , S , and N T 1

An ISDN line from the central office is a single copper pair identical to a normal (unloaded) analog line. When it arrives at the subscriber, it is called the “U” interface. It is a two-wire connection, usually via a 4-pin RJ-11 style modular jack.

The ‘S’ interface is at the user side of the Network Termination Type 1 (NT1) device. The NT1 is sometimes generically called a NCTE (Network Channel Terminating Equipment) or, in some countries an NTBA. It is a four-wire connection, via an 8-pin RJ-45 style modular jack. (Sometimes the S interface is called S/T. There is a subtle distinction between the two, but it is not relevant for our purposes here, and the two may be considered to be the same.)

In the USA & Canada, NT1 functionality is usually included in the terminal equipment. In other parts of the world, the Telecom Company provides the NT1.

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Telco

Interface

reference

point

NT1

S/T

Interface

reference

point

In the USA & Canada the NT1 is owned by the end-user whereas in the rest of

the world it belongs to the Telecom Agency.

Only one NT1 may be connected to a U interface. However, as many as eight terminals may be paralleled onto the S bus.

The North American version of the TWOx12’s ISDN interface has 2 internal NT1s per interface card with the U interface connectors available at the rear panel.

Section 2.5 has specific information on connecting the unit in various regions of the world.

2.4 Ordering ISDN – an introduction

This section has a quick overview, for specific information on ordering ISDN see Appendix 6 (Euro ISDN) and Appendix 7 (USA & Canada). The Telos TWOx12 supports the usual protocol standards:

ISDN EQUIPMENT

ISDN network connection reference points.

For USA & Canada

• National ISDN 1 & 2 (these are the preferred options)

• AT&T “Custom Point-to-Point” (may only allow a single channel)

• Northern Telecom (Nortel) DMS-100 “Custom functional”

For Europe and many other parts of the world

• “Euro ISDN” according to ETS-300 (NET-3, ISDN-2, BRI, S∅)

B and D Channels

The B “Bearer” Channels are the 64 kbps paths that carry the voice audio. The D “Data” channel is the path between the central office and terminal equipment that is used for call set-up and status communication. All lines must have a D channel, but there is sometimes a choice as to the number of enabled B channels.

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CURIOSITY NOTE!

While the D channel is always present for signaling, it can, in theory, be used for packet data connections. ISDN lines where the D channel is used for signaling only are

sometimes

not widely available, and is not used by the TWOx12 or other Telos equipment.

Data and Voice

ISDN lines may be used for voice signals encoded in standard fashion to allow interworking with analog telephones, or may be used to transmit digital data streams. The latter mode is used for such applications as high-speed Int erne t acce ss. It is als o the mode used with MPEG codecs, in which case the ISDN line may be carrying voice signals, but is doing so in a format that is not compatible with the analog part of the telephone network. The distinction is made in the automatically conveyed “Setup” message that begins each call.

DEEP TECH NOTE!

The voice mode may well be able to transmit digital data–and some Telephone Companies charge more money for data capability. That is why some ISDN “modems” have a special data- over- voice option that fools the central office into billing as if it were a voice connection.

referred to as 2B+0D rather than 2B+D. D channel packet service is

Normally, the Telos TWOx12 uses only the voice mode, so data capability is not necessary. Of course, you may use a line with both capabilities with the system at any time. Just be sure the BRI circuit supports the Circuit Switched Voice (CSV) capability as well as data.

HOT TIP!

If this line may be “borrowed” at times for use with an audio codec, such as the Telos Zephyr or ZephyrExpress, then you need to be sure that the Circuit Switched Data (CSD) capability is enabled.

Hunt Groups

The most common configuration for on-air phone system is to have the different phone numbers linked in a “Hunt Group,” also called “Rollover Lines,” or “Incoming Service Grouping (ISG).” A hunt group allows you to give out a single number to the audience and

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each call will “hunt” to an unused line. Sometimes one or two numbers will be reserved for a “hot line” or “warm line” in which case those numbers would not be part of the hunt group.

Special Considerations for Euro-ISDN (ETS 300) users

Some Euro-ISDN implementations deactivate BRI circuits which have been idle for more than a given length of time. Since this is a normal occurrence, the Desktop Director and system front panel will not show these lines out of service when this happens. While this will not interfere with normal operation, it can give a false sense of “security” that everything is working when, in fact, the circuit could have stopped working. It is impossible for the Telos TWOx12 to distinguish between a deactivated circuit and a malfunctioning circuit until you try to use it again. For this reason, if you are using ETS 300 and your phone system is mission critical, you should ask your Telecom Company to disable this function.

Ordering Help

An appendix to this manual describes the ordering process for ETS 300 (Appendix 6) and USA/Canada (Appendix 7) ISDN in detail, and include ready-to-go forms that can be used to order lines from your telephone company. We strongly recommend confirming your ISDN order in writing using those forms.

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2.5 Connections to the Telco circuits

If you are using analog POTS circuits please read this introductory section and then skip to section 2.5.3

Introduction – Choices

First we must consider if the system will be connected directly to the Telco or will be “behind” a PBX (private telephone system). The TWOx12 will generally be used completely independently of any other phone system in your facility. In that case the system block diagram will look similar to the “Direct Connection” example below.

Another option is to have one or more of the lines come off another phone system as shown in the “Behind the PBX” and “Mixed Configuration” examples below. If you have a telephone system capable of generating ISDN BRI on its station side then you may be able to save money by having it generate some the ISDN BRI lines. See section 2.5.2 for more on integrating the TWOx12 with a PBX.

The above diagrams illustrate several possible configurations of the TWOx12 and incoming lines.

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IMPORTANT!

You will probably receive large number of calls on this system. If your PBX has a PRI or T- 1 coming from the phone company which will be shared for business operations, it mayed to be programmed to reserve some capacity for those calls. One option would be to have the Telco provision (configure) the PRI or T- 1 into separate trunk groups for the Business and On- air telephone systems.

You should discuss this with both your local telephone service provider and your PBX provider. It is also important that you inform the Telco that this will be a high volume application so they can be sure that your contests will not interfere with 911 and other emergency services.

The final option shown offers redundancy. Having at least one line directly from the phone company keeps your TWOx12 up and running even if one of the two routes is down due to a bad line.

The next section discusses using the ISDN version of the TWOx12. Skip to section

2.5.3 if you are using analog phone lines.

2.5.1 Connecting the Telos TWOx12 to ISDN

The TWOx12 uses internal plug-in modules to attach to ISDN. These ISDN modules have two modular jacks accessible through each rear slot, in slots A, B, & C. The type of jack will be either a 6 position “RJ-11” style or an 8 position “RJ-45” style depending upon whether it is the version for USA & Canada or the rest of the world.

IMPORTANT TIP!

All ISDN BRI Circuits must use the same protocol (Telco setting). If you are using the “Mixed Configuration” option, be sure to check what protocols your Telco offers and check to see that your PBX supports one of the same protocols. Note that National ISDN- 1 is the most common protocol In the USA & Canada and is available on most ISDN capable switches in those countries, while ETS 300 is the most popular protocol worldwide.

(If you ordered an analog TWOx12 see section 2.5.3)

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ISDN TWOx12 Version

The ISDN version of the TWOx12 has Telco interface cards in slots A, B, & C. Each interface

supports two ISDN BRI circuits. Since each BRI circuit has two Telco channels (or “Lines”) there

are 4 channels per BRI interface card. The ISDN jacks on the rear panel may be either RJ-45 or

RJ-11 style depending on the country.

The correspondence between the interface slot to the system “Line” number for an ISDN TWOx12 is illustrated in the following table:

Slot Designation Circuit # Channel ID #

System “Line” #

(Telephone #)

A Top1 A Top2 A Bot1 A Bot2 B Top1 B Top2 B Bot1 B Bot2 C Top1 C Top2 C Bot1 C Bot2

This table shows the relationship between the TWOx12’s connectors, the Telco circuits

and the system “line” number for the ISDN TWOx12. See section 3 for a form to organize

1 1 2 2 3 3 4 4 5 5 6 6

this information prior to programming your system.

DN/MSN 1 DN/MSN 2 DN/MSN 1 DN/MSN 2 DN/MSN 1 DN/MSN 2 DN/MSN 1 DN/MSN 2 DN/MSN 1 DN/MSN 2 DN/MSN 1 DN/MSN 2

1 2 3 4 5 6 7 8 9 10 11 12

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In the USA & Canada, a direct connection to the "bare copper" 2-wire U interface is required. Therefore, the USA & Canada interface module includes an integral NT1 and the RJ-11 style jack is provided. Users in USA & Canada should follow the hookup information that follows.

In the rest of the world, the Telephone Company provides the NT1 and the 4-wire ISDN ‘S’ interface will be used via the 8 pin RJ-45 style jack. The ISDN interface in Telos TWOs shipped to these locations is provided only with this connection. Users outside the USA &

Canada should skip ahead to “ISDN Worldwide (outside the USA & Canada): The S/T Interface” for hookup information.

ISDN in USA & Canada: Using the U Interface

Connect the ISDN line from the telephone central office directly to the RJ-11 style “U interface" modular jack on the rear panel ISDN interface using the standard modular phone cable provided.

U Top (1/2)

To Telco - ISDN RJ-11 (Standard Modular)

U Bottom (1/2)

To Telco - ISDN RJ-11 (Standard Modular)

Normal set-up in the USA & Canada. The U jack connects directly to the Telco line and

IMPORTANT!

Your ISDN connections are in the first 3 Interface slots from the left side of the unit as viewed from the rear of the unit (slots A, B, & C). The RJ- 45 style connectors to the right side (slot F) are for the Desktop Directors.

TWOx12 USA ISDN Interface

NT1 TA

NT1

the S/T jack is unused.

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ISDN U interface connector (USA & Canada only)

PIN FUNCTION

1 N/C

2N/C

3 Line (R)

4Line (T)

5 N/C

6N/C

ISDN U interface connector as provided on units shipped to the USA & Canada. Note,

the polarity of the line connections should not matter.

IMPORTANT!

As with any piece of modern electronic gear, it is advisable that precautions be taken to prevent damage caused by power surges. Standard telephone line surge protectors can be used to offer some degree of protection at the U interface jack. It is the user’s responsibility to ensure that adequate protection is provided

U Interface Status LEDs

The small green LEDs, on the ISDN interface card, near each U jack, indicate the status of the corresponding ISDN circuit. Normal status is indicated by the LED being lit. Rapid flashing (about five times per second) indicates a loss of the ISDN at the lowest (physical) level. If the NT1 can contact the central office (or an active U repeater), the LED will blink slowly (about once per second). The LED will come on solid when all handshaking is completed and the basic line connection is good. If each of these LEDs do not light continuously once you have connected your ISDN circuits, you may wish to skip ahead to Section 8 for information on troubleshooting the problem.

HOT TIP!

Normally, the Telephone Company should supply an RJ- 11 style jack for the U interface. This is the same 4 or 6- pin plug used for analog lines. However, sometimes you may find an 8- pin RJ- 45 style jack–and sometimes you may even be charged extra for it! If you have this situation, an RJ- 11 plug can be inserted into the center of an RJ- 45 jack to make things work. If you discover that the Telco charged you extra, be sure to request a refund!

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ISDN Worldwide (outside the USA & Canada ): The S/T Interface

The Telos TWOx12 connects to the NT1 at one of its terminal jacks. The NT1 is sometimes generically called a NCTE (Network Channel Terminating Equipment) or, in some countries an NTBA. Use only an 8-conductor RJ-45 style cable. Unshielded twisted pair category 3 (or higher) cable should be used. The cable details are shown below:

IMPORTANT!

Your ISDN connections are in the first 3 Interface slots from the left as viewed from the rear of the unit (slots A, B, & C). The 8 pin RJ- 45 style connectors to the right side (slot F) are for the Desktop Directors.

o Telco

TWO S/T ISDN Interface

NT1

(NTBA)

NT1

(NTBA)

The usual set-up outside the USA & Canada. The S/T jack is connected to the

S Top (1/2)

RJ-45

S Bot (1/2)

RJ-45

NT1 (or NTBA) provided by the telephone authority.

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ISDN S interface connector

PIN FUNCTION

1 N/C

2N/C

3 S Transmit to network +

4 S Receive from network +

5 S Receive from network -

6 S Transmit to network -

7 N/C

8N/C

The S interface is a standard modular RJ-45 style jack with the pin-out shown above.

IMPORTANT!

As with any piece of modern electronic gear, it is advisable that precautions be taken to prevent damage caused by power surges. Special ISDN S interface surge protectors can be used to offer some degree of protection at the S interface jack. It is the user’s responsibility to ensure that adequate protection is provided

ISDN S interface cable

BRI S Interface cable.

Note: Pin 1 is to the left when viewed as above (with pins facing you and at the top).

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PIN TIA 568A

COLOR

1* White/Green PS 3 Power +/ground (Optional)

2* Green PS 3 Power – (Optional)

3 White/Orange Xmt (TE to NT1) to Network +

4 Blue Rcv (NT1 to TE) from Network +

5 White/Blue Rcv (NT1 to TE) from Network -

6 Orange Xmt (TE to NT1) to Network -

7@ White/Brown PS 2 Power 48 VDC – (Optional)

8@ Brown PS 2 Power +/ground (Optional)

TIA 568ACategory 5 cable wiring diagram. Both ends are wired identically. Note that the S interface

Not used in Telos Products

Not used on the TWOx12

does not require all 8 conductors.

DESCRIPTION

HOT TIP

When fully wired, this cable has 4 twisted pairs wired “straight through” just like the

•

cables often used for Ethernet 10Base- T. The wiring configuration is the same as TIA 568A (TIA- 568B is electrically equivalent, and can also be used).

Both ends are wired identically.

•

The outside pairs are generally not required and may be omitted.

•

The ISDN S interface on the Telos TWO does not provide power. Usually the Telecom company will arrange for power to the NT1 (NTBA).

2.5.2 Integration with a PBX using ISDN

The TWOx12 has been used satisfactorily using BRI off the following PBX Switches used in USA and Canada:

Nortel Meridian 2 wire (U interface) [User report] Please contact Technical Support for the latest information or report you experiences with

other switches.

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IMPORTANT!

ETS 300 Euro- ISDN is available from many PBX systems outside the USA and compatibility is generally good. If you are in USA or Canada, however, be sure to read the next

ISDN TIP

ISDN TIP!

While BRI support is available on a number of PBXs, you should not plan to use ISDN ports on your PBX for the TWOx12 unless the configuration is on the above list. If not, you should arrange to test compatibility before purchasing the expansion module for your PBX. Just because the sales person says it supports National ISDN-1 is not enough! Compatibility varies widely. Let us know what you discover.

2.5.3 Connecting the TWOx12 to POTS (Plain Old Telephone Service) (If you ordered an ISDN TWOx12 see section 2.5.1)

The TWOx12 uses internal plug-in interface modules to attach to POTS (regular, analog loop start, telephone lines). These modules have three modular jacks accessible through each rear slot, in slots A, B, C & D. The type of jack will be a 6 position 4 pin “RJ-11” style. You will connect the lines to the TWOx12 using the standard modular telephone cables provided.

The Analog version of the TWOx12 has Telco interface cards in slots A, B, C, & D.

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The correspondence between the interface slot to the system “Line” number for an analog TWOx12 is illustrated in the following table:

Slot Designation Channel ID #

(Telephone #)

A1 1 1 A2 2 2 A3 3 3 B1 4 4 B2 5 5 B3 6 6 C1 7 7 C2 8 8 C3 9 9 D1 10 10 D2 11 11 D3 12 12

The correspondence between slot designation, channel ID (phone number) and system “line”

number is shown above. See section 3 for a form you can fill out to organize this information prior

to programming the system.

System “Line” #

IMPORTANT!

When we say POTS lines we mean just that – Plain Old (analog loop start) Telephone Service lines. These ports are uncertain if it is a POTS line work, and it could cause damage to your system. You can easily check the type of line by connecting a standard analog telephone to it and check to see if it works.

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A rule of thumb – if it works with an analog modem or fax machine it's safe to connect it!

Most private PBX telephone systems can accommodate “analog ports” for analog “legacy” equipment such as modems and fax machines. You will need such ports to connect a POTS TWOx12 to most PBX’s.

must not

be connected to proprietary phone ports off a PBX. If you

connect it to the TWOx12! If it is not POTS it won’t

don’t

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HOT TIP!

A few years back we always advised that hybrid performance was best when equipment was connected directly to the lines from the Telco. Today, this is not always true. If the PBX is connected to the Telco using digital lines (such as T1, E1, PRI, S2, etc), performance through a digital PBX will generally be better than direct connections to copper analog circuits. This is particularly if you are located a significant distance from the Telco central

office.

The biggest variable when connecting to a PBX analog port is the quality of the analog port. We have found that many PBX manufacturers offer more than one analog port option. The better port can usually be distinguished by its higher cost, and the fact that it may offer 48 volts rather than 24 volts. The Telos TWOx12 will work with either voltage, however experience has shown that the 48 volt version usually has better quality transformers and other components resulting in better hybrid performance.

The other thing to investigate is whether the PBX offers "Loop Current Drop" or "CPC" (Calling Party Control) on its analog ports. Without this supervision the TWOx12 will not be able to determine If a party on hold has hung up, and your talent will get a recording "please hand up and dial again…" or dial tone when attempting to air the call.

2.5.4 Mixed ISDN/Analog Configurations

Those who desire a system with mixed analog and ISDN connections may replace one of the interface cards with one of the other type. Section 8.6 lists the part numbers for the interface cards.

The TWO x12 has been designed to work in the following mixed configurations: A) 1 Analog interface (slot A) and 2 ISDN interfaces (slots B & C) for a total of 11 lines:

A mixed interface TWOx12 with a POTS interface card in slot A and ISDN interface cards in slots

B, & C. The POTS interface supports 3 circuits while the ISDN interface supports two ISDN BRI

circuits. Since each BRI has two Telco channels (or “Lines”) there are 4 channels per BRI

interface card. This configuration has a total of 11 channels.

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The correspondence between the interface slot to the syst em “Lin e” numbe r for the above mixed TWOx12 configuration is illustrated in the following table:

Slot Designation

Channel ID # (Telephone #)

System “Line” #

A1 1 1 A2 2 2 A3 3 3 B Top1 B Top2 B Bot1 B Bot2 C Top1 C Top2 C Bot1 C Bot2

This table shows the relationship between the TWOx12's connectors, the Telco circuits, and the

system "line" numbers for the mixed ISDN/POTS TWOx12 described above. See section 3 for a

form you can use to organize this Information prior to programming your system.

4 (DN/MSN 1) 4 (DN/MSN 2) 5 (DN/MSN 1) 5 (DN/MSN 2) 6 (DN/MSN 1) 6 (DN/MSN 2) 7 (DN/MSN 1) 7 (DN/MSN 2)

4 5 6 7 8 9 10 11

B) 1 ISDN interface (slot A) and 3 Analog interfaces (slots B, C, & D) for a total of 12 lines (note that the bottom jack of the analog card in slot D will be inactive in this configuration)

A mixed interface TWOx12 with an ISDN interface card in slot A and POTS interface cards in slots

B, C, & D. The ISDN interface supports two ISDN BRI circuits while POTS interface supports 3

circuits. Since each BRI has two telco channels (or “Lines”) there are 4 channels per BRI interface

card. Since the TWOx12 is a 12 line system, the last POTS port (D3) is not used in this

configuration.

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The correspondence between the interface slot to the syst em “Lin e” numbe r for the above mixed TWOx12 is illustrated in the following table:

Slot Designation

A Top1 A Top2 A Bot1 A Bot2

Channel ID # (Telephone #)

1 (DN/MSN 1) 1 (DN/MSN 2)12 2 (DN/MSN 1) 2 (DN/MSN 2)34

System “Line” #

B1 3 5 B2 4 6 B3 5 7 C1 6 8 C2 7 9 C3 8 10 D1 9 11 D2 10 12 D3 Not Used Not Used

This table shows the relationship between the TWOx12's connectors, the Telco circuits, and the

system "line" numbers for the mixed POTS/ISDN TWOx12 described above. See section 3 for a

form you can use to organize this Information prior to programming your system.

Other than the physical interface, your system will work as usual in the above mixed configurations. You will need to follow the information in section 2.5.1 for information about connecting ISDN and the information in section 2.5.4 for informa tio n about connecting analog lines.

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2.6 Studio Audio Connections

2.6.1 Mix-Minus

What is a mix-minus?

The Telos TWOx12 must be fed send-to-caller audio which is free of the caller audio, a “mix-minus”. A mix-minus is a mix of all of your audio sources which will be placed onair (or recorded) except the incoming caller audio–thus the “mix-minus” designation. The European term “mix minus one” is a clearer term for the typical situation. A mix-minus is also sometimes referred to as a “clean feed”. Most mode rn cons ole s (m ixin g desks) ar e able to handle one or two of these, but more may be difficult. In that case it may be necessary to get creative. The important thing to remember is that the hybrid must not “chase its tail,” where its output makes its way somehow back to the input.

Some exa mpl es:

Example 1: Using a broadcast console (mixing desk)

A multibuss stereo broadcast conso le is in use. Progr am is used to feed the transmi tter and Audition is used for some other application. A third buss, “Utility,” is not in use, so we will use this to create a mix-minus for a single hybrid.

All sources, including the hybrid, will be assigned to Program, so the audience can hear them, as usual. We will also assign most of these sources to Utility as well, just never the fader representing the hybrid’s own audio.

MICRO-

PHONES

UTILITY BUS

LINE

CHANNELS

PHONE

CHANN EL

PROGRAM

OUT

PROGRAM

Hybrid

SendRcv

BUS

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MIX- MINUS TIP!

This arrangement is very flexible as it allows the operator to place any or all sources in Utility for the caller to hear. Also, if the talent wishes to talk about the caller without him/her hearing, the talent’s microphone need only be taken out of Utility to do so.

The only drawback to this approach is the potential for the operator to accidentally put the hybrid in Utility, in which case it is no longer a mix- minus.

Example 2: Using a utility mixer

A general purpose utility mixer is used to record interviews off the telephone line using a single hybrid. The mixer’s main bus is fed to the recording device. Both the microphone and the hybrid will be brought up on the faders so the interview can be recorded.

Again, we will use a second buss to feed the hybrid. In this case, we will take the Aux 1 output to feed the hybrid. We will turn up Aux 1 for the microphone but we will make sure it is turned fully off for the input channel with the caller audio.

Mic Preamp

AUX 1

AUX 2

Mic1

OUTPUT

FROM

HYB #1

Caller

NOTE

This must be turned

down or AUX 1 will no

longer be a mix-minus!

UTILITY

MIXER

LEFT OUTPUT

RI GHT OUTPUT

AUX 1 O UT AUX 2 O UT

TO HYB #1 "IN"

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Why do I need a mix-minus?

Adaptive hybrids, commonly used in broadcast applications since Telos pioneered the technology, work by comparing the audio sent to the audio received. The system then adjusts itself to minimiz e send audio in the audio com ing back (i. e. min im iz es leaka ge). Thus the audio fed to the hybrid is, in effect, a reference signal. If the audio sent into the hybrid contains the caller audio (the audio we want) then there is no reference signal and the system cannot do its job.

CURIOSITY NOTE!

This is why we at Telos do not claim our hybrids will work without a mix minus. Sure, they might work without a mix- minus (it has been done), giving borderline performance, but that’s not good enough. Do the job right and use a mix- minus!

An additional problem is the potential for feedback through the hybrid. In any real world situation there will be some leakage of the send audio into the received audio. With gain through the AGC and console, this path creates a loop and feedback can occur. The Telos TWOx12’s extremely low leakage makes this scenario unlikely, however a clean mixminus is still essential for optimal performance.

TELOS TWOX12 USER’S MANUAL

Wiring Configurations for the Desktop Director™

Each Desktop Director™ is supplied with a 25-foot cable which is used to make this connection. You can make your own cables as long as they follow the wiring shown above. Category 3 type (Cat 3) or higher cable must be used; we suggest Category 5 type (Cat 5) wire. The usual configuration of two Desktop Directors involves merely plugging in this supplied cable to the Director and TWOx12 as illustrated below:

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(

250 feet (76 meters) maximum

To TWOx12 Deskto

Director Port

The usual Desktop Director™ configuration is simple and straightforward.

If the Desktop Director™ must be located more than 250 feet (76 Meters) from the TWOx12 you will need to use a local power supply (Desktop Director Expander Kit part # 0212-1400) to supply power to it. In that case, your configuration will look like the following:

250 feet

75 meters) maximu

In the extended configuration the Desktop Director™ must be within 2300 feet (700 meters) of the TWOx12. The power supply must be 250 feet (76

Meters) or less from the Desktop Director.

Lucent Power Supply

Multiple Desktop Directors on a single port

This connection option is similar to the preceding, and allows two Desktop Directors to be connected to a single Desktop Director™ port of the TWOx12 (allowing for 4 Desktop Directors total). To do so you will need to use a local power supply and modular splitter (Desktop Director™ Expander Kit part # 0212-1400) to connect it. There are two reasons you might wish to do this. If you need to connect more than two Desktop Directors you would have to use this method. Or, you might choose this method to save on cable runs back to a TWOx12 located some distance away.

2050 feet (625 meters) maximu

To TWOx12 Deskto

Director Port

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Distance "A"

Distance "B"

In the Multiple configuration one Desktop Director™ must be reconfigured to

have its termination resistors removed (see below). This unterminated

Desktop Director™ must be within 33 feet (10 meters) of the power supply

8-Pin (RJ-45) Modular splitter

Lucent Power Supply

1100 feet (338 meters) maximum

To TWOx12 Deskto

Director Port

NOTES:

1) A must be less than 120 feet (37 meters)

2) B must be less than 33 feet (10 meters)

3) Desktop Director B must have terminatio resistors removed.

Desktop Director™ Termination Resistor Settings

Desktop Directors™ are shipped with the internal termination resistors enabled. When two Desktop Directors are used in a single port, the termination resistors on the Director closer to the power supply will need to be disabled. To do so follow the steps below:

1. Disconnect the Desktop Director cable from the Desktop Director.

2. Remove the handset from its resting place and turn over the Director so you can

see the bottom of the unit.

3. Remove the round black cover. This can be pried off with a knife blade. Or a

miniature screwdriver may be pushed firmly under the lip and then lifted out to pop the cap loose.

4. You will see a black rectangular transformer labeled T1. To the right of T1 locate

and remove the jumpers labeled JP1 & JP2.

These are small jumper blocks which can be lifted off with needle-nose pliers.

5. You’ll want to save the jumper blocks. You can store each of them on one of the

jumper pins.

6. Replace the access cover removed in step 3 by pushing firmly in place.

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7. Reconnect the Desktop Director cable and turn the unit upright

8. Check for proper operation

Desktop Director Assembly

Wire assembly

This should be fairly self explanatory. The black “curly cord” plugs into the handset. The other end of this cord should be plugged into the small 4 position/4 pin modular (RJ-22 style) jack near the front left of the unit. This jack is identified with a picture of a telephone handset and is the jack closer to the front of the Director. The second jack at this location can be used to directly connect a telephone headset and is identified with a picture of a headset. Route these cables through the small slots to the left so they do not interfere with the unit sitting flat on the table.

HOT TIP!

We have tested, and recommend, the Plantronics model P51- U10P "Supra Polaris noisecanceling unamplified monaural" or model P61- U10P "Supra Polaris noise- canceling unamplified binaural " headsets for use with the Desktop Director. For the name of your nearest Plantronics dealer contact them at 831 426- 5868 or www.plantronics.com.

TELOS TWOX12 USER’S MANUAL

When the headset is attached it will automatically mu te the micro phone of the hands et to prevent extraneous noise. Disconnecting the “quick-connect” inline connector on the headset cable will re-enable the handset microphone .

Line Designation Strip

The Desktop Director ships with several pre-cut paper “designation strips” to allow labeling the lines of the Director. Choose one and fill out the line numbers if desired (we suggest a “Sharpie extra fine point” or similar fine point indelible marker). Place the paper strip on the director and then cover with the clear plastic protector, inserting the plastic tabs in the slots on the Director to hold it in place. Should you decide to change things later, simply lift one end of the plastic and slide out the strip.

Mounting Opti ons

The Desktop Director legs can be mounted in an alternative “upright” orientation. To do so, remove the legs by removing the two Phillips head screws on each leg. The legs can then be mounted in the alternative orientation using the same screws.

The Desktop Director can be mounted on a wall or other vertical surface. First remove the legs by removing the two Phillips head screws on each leg. The unit can then be hung from two screws on 5 inch (127 mm) centers. Care should be taken that the screws do not protrude more than 1/8 inch (3 mm) from the mountin g surfa ce.

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2.8 AC (mains) Power

The AC receptacle connects mains power to the unit with a standard IEC (International Electrotechnical Committee) power cord and provides an on/off switch. The power supply has a “universal” AC input, accepting a range from 100 to 240 VAC, 50-60 Hz. A fuse is located inside on the power supply circuit board.

IMPORTANT!

As with any piece of modern electronic gear, it is advisable that precautions be taken to prevent damage caused by power surges. Standard line surge protectors can be used to offer some degree of protection. It is the user’s responsibility to ensure protection adequate for their conditions is provided.

TELOS TWOX12 USER’S MANUAL

IN TE R NA L F U SE

UN IVERSA L POW ER INPUT

90-260VAC

WARNING!

This equipment is designed to be operated from a power source which includes a third “grounding” connection in addition to the power leads.

Do not defeat this safety feature. In addition to creating a potentially hazardous situation, defeating this safety ground will prevent the internal line noise filter from functioning.

IMPORTANT SAFETY INFORMATION!

If fuse replacement is required, please note:

against fire, replace fuse only with same type and value.

DETAILED TECHNICAL INFORMATION section for information and cautions.

For continued protection

See the

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2.9 Remote Control Ports

2.9.1 Parallel Remote Control

This is a 15 pin D-Sub connector. This port provides status outputs (tallies) from the system and allows system control using simple logic inputs or switch closures. It also has outputs to control external equipment such as an Audio Delay or Recording device. The pin outs and interface specifications are given here. The available functions for these inputs and outputs are:

Record Control Outputs (See section 4.3.3)

Ring Mute In This input will mute the ringers on all of the Desktop Directors connected to this

TWOx12.

User Out (Delay Dump) This output will be asserted (low) when the User button is pressed. It will remain

asserted until that button is released.

Ringing Out This output is asserted (low) whenever the system has one or more lines in the ringing

state.

PARALLEL CONTROL

For a table with the pin-outs for this connector see the next page.

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PIN FUNCTION

1 Ground 2<Reserved> 3 Record Start Out 4 Record Stop Out 5 N/C 6<Reserved> 7 Ring Mute In 8* +5 VDC (400 mA max) 9 N/C 10 User Out (Dump) 11 Ringing Out 12 N/C 13 <Reserved>

Inputs

14 <Reserved> 15 N/C *

Note that the +5 volts DC on pin 8 is in parallel with pin 3 on both SAA ports. Failure to limit combined current on these pins to 400mA could cause hardware damage or system instability.

CURIOSITY NOTE!

The DB- designation for D- Sub connectors is from Cinch Corp’s part numbering system. The proper Cinch designation for a 15 pin D- Sub connector is a DA- 15p (plug) or DA- 15s (socket) not DB- 15!

Other Cinch designations for D-Sub connectors are; DE-9, DB- 25, DC-37 and DD- 50.

Our thanks going out to Mike Schweizer, for contributing this information.

This power pin is in parallel with pin 3 of the SAA ports

• The function for each input is shown on the previous page.

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• All inputs are specially treated to accept either a voltage (up to 24 VDC), or a closure

to ground, which may be provided by switches, relays, or logic outputs. The inputs are active low.

• A built in 1kΩ pull up resistor is provided so TTL outputs can be directly interfaced.

See below for a simplified schematic of the input circuitry.

+5V

30v max

Parallel logic input circuit

Outputs

DEEP TECH NOTE!

The TWO’s “universal” logic input circuit can be used with switch or relay closures, voltage levels up to 24 Vdc, or logic outputs – either “totem- pole” or open- collector.

Outputs are open collector to ground and can sink up to 400 mA of current. Their functions are shown on the previous page.

These will require a pull-up resistor to function with other logic inputs. Some equipment has the pull-ups built into their control inputs – check the device’s manual to be sure. If there is no pull-up in the interfaced equipment, you’ll have to add one. An appropriate

value is 2.2KΩ. Current should be limited to 400ma maximum per output with total output restricted to 1

amp (200ma each output if all five will be used). If used with a relay or LED, then tie your external power source ground to pin 1 (or use the

5 VDC power supplied on pin 8 and run this power source through your device, with a resistor in series to limit max imu m cur ren t to 400 ma.

For additional information refer to sec tio n 7.3.3.

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2.9.2 Special Auxiliary Access ports

These ports are unimplemented and are reserved for future use.

The input and output electrical characteristics are the same as the general purpose inputs and outputs, see section 2.9.1. Note that the +5 volts DC on pin 3 has both SAA ports in parallel with pin 8 on the Parallel remote control port. Failure to limit the combined current on these pins to 400mA could cause hardware damage or system instability.

2.9.3 RS-232 Serial Remote Control

SAA 1

SAA 2

The RS-232 serial port supports asynchronous data, 8 bits, no parity, 2 stop bits, 240038,400 bits per second. The Clear to Send (CTS) handshake signal is provided, however any handshake signals from the external equipment are ignored. This port is primarily for troubleshooting purposes and should be used as directed by Telos Customer Support. Connector is a 9 pin D-Sub connector with the following pin-out:

RS-232

DCE

PIN FUNCTION

2 Rx (TWO to Computer)

3 Tx (Computer to TWO)

5 Ground

8 CTS (TWO to Computer)

Using a 9 pin D-Sub connector, this is an RS-232 serial port using the standard PC-style format,

configured as if it were a modem.

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HOT TIP!

This port is configured for DCE (Data Communications Equipment) as opposed to DTE (Data Terminal Equipment) operation – meaning that it looks like a modem, not a computer. Therefore, a “reversing” or “null-modem” cable is required to connect to a modem, while a standard “straight through” cable is required to interface to a computer. Cables may be easily fabricated or may be obtained from a computer store.

The following tables show the recommended cable configuration for connecting the Telos TWOx12 to 9 pin and 25 pin DTE (computer) serial ports.

CABLE PIN OUT 9-PIN

Computer (DTE) Description Direction Telos TWO

1 *Data Carrier Detect (DCD) 2 Receive Data (RD) 3 Transmit Data (TD) 4 *Data Terminal Ready (DTR) 5 Signal Ground (SG) 5 6 *Data Set Ready (DSR) 7 *Request to Send (RTS) 8 *Clear to Send (CTS) 9 *Ring Indicator (RI)

*Optional connection, may not be required

3 3 4 4

3 4 3 3

8 2 3 Not used

8 Not used 8 Not used

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CABLE PIN OUT 25-PIN

Computer (DTE) Description Direction Telos TWO

2 Transmit Data (TD) 3 Receive Data (RD) 4 *Request to Send (RTS) 5 *Clear to Send (CTS) 6 *Data Set Ready (DSR) 7 Signal Ground (SG) 8 *Data Carrier Detect (DCD) 20 *Data Terminal Ready (DTR) 22 *Ring Indicator (RI)

*Optional connection, may not be required

2.9.4 Ethernet Remote Control

Ethernet 10Base-T connector for connection to an Ethernet Local Area Network. This allows the TWOx12 to communicate directly to Telos Assistant Producer 2.0 clients running on your network. The TWOx12 need not be connected to a host computer running server software as required with older Telos Telephone Interface products (in fact Telserv is not required). In addition, the system can be controlled using a Telnet connection using this port. Section 7.4.1 has a list of commands which can be sent over the RS-232 or Ethernet port to control the system.

4 3 4 3 3

3 4 3

3 2 Not used 8 8

8 Not used Not used

IMPORTANT TIP!

Assistant Producer version 2.0 or later is required for use with the TWOx12.

If you will be using call screen software we recommend that a separate LAN be used exclusively for the Talk Show System. This will avoid sluggish responses caused by large amounts of other network traffic.

This port is also used for software upgrades over the Internet. For details see section 7.3.3. This is an industry standard 10Base-T Ethernet connector on the usual 8 pin miniature

modular (RJ-45 style) jack.

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The 10Base-T connector has two integral LED indicators which can be helpful if problems are suspected.

The green “Link” LED indicates the presence of a live physical connection to a working Ethernet hub (or other device). If the green indicator does not light you should check your network wiring. Absence of the link light could also indicate a hardware failure of the TWOx12.

The amber “Activity” LED indicates network activity on this segment of the network. Depending on network activity this indicator may only illuminate occasionally; flickering of this light is normal.

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3 Getting Up & Going –System Configuration

3.1 System programming

The checklist on the next few pages is intended to help you collect the information you will need about your lines and enter it into the TWOx12. The first half should be completed with the relevant information about your lines, and the second half then followed to program the lines themselves.

Before proceeding through the steps outline d in this sect ion ple ase per form the initial installation as described in section 2. See the Installation Checklist in section 2.2

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System Programming Checklist (Copy this checklist and u se it to help or ganize your installation)

Part I-Line Information

For each interface slot (A, B, C, & D), there will be either an ISDN interface or a POTS (analog line) interface present (see sections 2.5.1, 2.5.3, & 2.5.4 for illustrations).

There are 4 channels on an ISDN interface, called Top1, Top2, Bot1, & Bot2. The ISDN BRI connected to the top jack has channels Top1 & Top2 while the ISDN BRI connected to the lower jack has channels Bot1 & Bot2. Each of these channels will normally have its own phone number (called a “DN” in USA and Canada or a “MSN” in areas using EuroISDN).

There are only 3 channels on a POTS interface, called 1, 2, & 3. So a POTS interface in Slot A would have 3 channels called 1, 2, & 3. Each of these channels will have its own telephone number.

Please enter the information for each interface slot below. For ISDN lines enter the DN or MSN in the space for Telephone Number. SPIDs are only needed with certain ISDN types in the USA & Canada, see sections 3.3 and 7.3.2 for more information.

Once you have completed these pages the telephone numbers indicate under “Telephone #/DN/MSN” from top to bottom will correspond to your Lines 1 through 12 of the system.

SLOT A

❏

POTS

(top)

❏

(middle)

❏

(bottom)❏(bottom)

❏

(Not present)❏(bottom)

❏

ISDN

(top) (top)

Telephone #/DN/MSN SPIDs (ISDN only-USA & Canada)

(A Top1) (A Top1) (A Top2) (A Top2) (A Bot1) (A Bot1) (A Bot2) (A Bot2)

SLOT B

❏

POTS

(top)

❏

(middle)

❏

(bottom)❏(bottom)

❏

ISDN

(top) (top)

Telephone #/DN/MSN SPIDs (ISDN only-USA & Canada)

(B Top1) (B Top1) (B Top2) (B Top2) (B Bot1)_ (B Bot1)

(Not present)❏(bottom)

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SLOT C

❏

POTS

(top)

❏

(middle)

❏

(bottom)❏(bottom)

❏

(Not present)❏(bottom)

❏

ISDN

(top) (top)

Telephone #/DN/MSN SPID (ISDN only-USA & Canada)

(C Top1) (C Top1) (C Top2) (C Top2) (C Bot1) (C Bot1) (C Bot2) (C Bot2)

SLOT D

❏

POTS

(top)

❏

(middle)

❏

(bottom)❏(bottom)

❏

ISDN

(top) (top)

Telephone #/DN/MSN SPIDs (ISDN only-USA & Canada)

(D Top1) (D Top1) (D Top2) (D Top2) (D Bot1) (D Bot1)

(Not present)❏(bottom)

(D Bot2) (D Bot2)

System Programming Checklist

Part II- Programming

❏ Set

Input Source

for

Digital

(AES/EBU) or

Analog

. See section 7.3.1

❏❏Does the system use any ISDN circuits? NY

#$❏ Are you familiar with ISDN? If not, read sections 2.3 & 2.4

❏ Configure ISDN. See section 3.3 ❏ Confirm ISDN is working. See section 3.5

❏ Set Input & Output levels. See section 3.6

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❏ Enter TCP/IP addresses if used. See section 7.3.3

❏ Read up on Desktop Director Operation. See section 4.

❏ Set up hybrid audio options. See section 7.3.1

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3.2 Initial Installation

We presume you have at least glanced through the material in chapter 2 and gone through the steps shown in the Installation Checklist (section 2.2). By now you should have your console mix-minus(es) connected to the TWOx12, and the TWOx12’s outputs connected to faders on your console (mixing desk). The TWOx12 should be connected to the ISDN (or POTS) telephone circuits and have power and be turned on. The LCD screen should be on and you should see the default screen similar to the one illustrated below.

TELOS TWOX12 USER’S MANUAL

TWOx12

V1.0

TELOS SYSTEMS yyyy-mm-dd

3.3 ISDN Setup (if you ordered an analog TWOx12 see section 3 .4)

We need to configure your TWOx12 for your telephone circuits. First we will need to determine circuit will represent each “line” of the system. You should fill out the Line information of the System Programming Checklist (see section 3.1) now, before proceeding. Recall that each BRI has 2 channels, each of which will appear to be a “line” to the users on the Desktop Director™. And each analog (POTS) circuit will appear as a “line” as well. The diagrams in sections 2.5.1, 2.5.3, & 2.5.4 show the relationship for various possible TWOx12 configurations.

The following are simple step-by-step instructions. For additional information and numerous tips on ISDN see section 7.3.2. Again, this will depend on where you are located:

ISDN setup for outside the USA & Canada begins on the next page. Users in the USA & Canada should skip ahead 2 pages.

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Worldwide ISDN Setup (

Worldwide ISDN Setup (outside USA & Canada): (Users outside the USA & Ca nada

Worldwide ISDN Setup (Worldwide ISDN Setup (

should skip this section)

• Press the TEL button You will see a screen which looks like the following:

Telco Settings

Audio Settings

Telco Natl.I-1 Slot A Slot B $ Slot C $

• Make sure the dark cursor bar is over Telco as shown (if not use the 5 & 6 keys to

move the cursor) and press the Select button.

• Press the 5 button until ETS300 (or other appr opr ia te proto col ) is shown and press the

Select button again to confirm.

• Scroll down using the 6 button until you have highlighted SLOT A with the dark

cursor bar.

• Press the Select button. You will now see a screen which looks like:

Audio Settings

Slot-A ISDN

↵

Top SPID1 Top SPID2 TopDN/MSN1

• Scroll down using the 6 button until you have highlighted TopDN/MSN1 and press

the Select button. Enter your first MSN for the ISDN circuit in the top jack of slot A using the numeric keypad. If you do not have a MSN you must ewnter a unique 3 digit number here. If a number had been previously entered you may delete it one character at a time by using the 5 button. Push Select again to confirm.

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• Scroll down to TopDN/MSN2 and repeat the previous step, entering the second MSN

for the ISDN circuit in the top jack of slot A. If your line does not have MSNs you must enter a unique 3 digit number here. Push Select to confirm.

• Scroll down to BotDN/MSN1 using the 6 button and repeat the previous step, entering

the first MSN for the ISDN circuit in the bottom jack of slot A. Push Select to confirm.

• Scroll down to BotDN/MSN2 and repeat the previous step, entering the second MSN

for the ISDN circuit in the bottom jack of slot A. Push Select to confirm.

• Scroll up to the ↵ using the 5 button and press the Select button.

• Repeat the steps above to enter your MSNs for slots B and C, if needed.

• Power the unit off and then back on.

USA & Canada ISDN Setup

USA & Canada ISDN Setup (users outside the USA & Canada sho uld see the previous section):

USA & Canada ISDN Setup USA & Canada ISDN Setup

• Press the TEL button You will see a screen which looks like the following:

Telco Settings

Audio Settings

Telco Natl.I-1 Slot A ISDN $ Slot B ISDN Slot C ISDN

• Make sure the dark cursor bar is over Telco as shown (if not, use the 5 & 6 keys to

move the cursor) and press the Select button.

• Press the 5 or 6 button until the appropriate protocol is shown (see tips below) and

press the Select button again to confirm.

IMPORTANT!

Each ISDN Line has a certain ISDN protocol (or “switch type”) which the phone company should have given you. By far the most common protocols in the USA & Canada are National ISDN- 1 & National ISDN- 2 in which case you should set the Telco setting to

If you do not know what protocol your line is configured for, try does not work see section 7.3.2 for hints on how to guess your protocol.

Natl.I- 1

first. If that

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• Scroll down using the 6 button until SLOT A is highlighted with the dark bar.

• Press the Select button. You will now see a screen which looks like:

Slot-A ISDN

Audio Settings

↵ Top SPID1 Top SPID2 TopDN/MSN1

IMPORTANT TIP!

You will be entering 2 SPIDs and 2 Directory Numbers (DNs) for EACH of your ISDN BRI circuits. In the menus that follow we use the following nomenclature for each slot in the TWOx12. Please take care to get the right SPID and DN in the correct entry field as ISDN requires this information to operate.

TOP BRI, 1st SPID & DN = TopSPID1 & TopDN/MSN1

TOP BRI, 2nd SPID & DN = TopSPID2 & TopDN/MSN2

BOTTOM BRI, 1st SPID & DN = BotSPID1 & BotDN1

BOTTOM BRI, 2nd SPID & DN = BotSPID2 & BotDN2

• Scroll down using the 6 button until you have highlighted TopSPID1 and enter your

the first SPID for the ISDN circuit in the top jack of slot A using the numeric keypad. If a number had been previously entered you can delete it one character at a time using the 5 button. Push Select again to confirm.

• Scroll down using the 6 button until you have highlighted TopSPID2 and enter the

second SPID for the ISDN circuit in the top jack of slot A using the numeric keypad. If a number had been previously entered you can delete it one character at a time using the 5 button. Push Select again to confirm.

• Scroll down using the 6 button until you have highlighted TopDN/MSN1 and enter

you’re first DN (Directory Number) for the ISDN circui t in the top jack of slot A using the numeric keypad. Push Select again to confirm.

• Scroll down to TopDN/MSN2 and repeat the previous step, entering the second DN for

the ISDN circuit in the top jack of slot A. Push Select to confirm.

• Scroll down to BotSPID1 and repeat the previous step, entering the first SPID for the

ISDN circuit in the bottom jack of slot A. Push Select to confirm.

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• Scroll down to SPID2 and repeat the previous step, entering the second SPID for the

ISDN circuit in the bottom jack of slot A. Push Select to confirm.

• Scroll down to BotDN/MSN1 and repeat the previous step, entering the first DN for the

ISDN circuit in the bottom jack of slot A. Push Select to confirm.

• Scroll down to BotDN/MSN2 and repeat the previous step, entering the second MSN

for the ISDN circuit in the bottom jack of slot A. Push Select to confirm.

• Scroll up to the ↵ using the 5 button and press the Select button.

• Repeat the steps above to enter your SPIDs & DNs for slots B and C.

• Power the unit off and then back on.

ISDN TIP!

1. Incorrectly entered SPIDs are the most common problem users in the USA & Canada have placing ISDN calls. Compare the SPIDs you have entered with the SPIDs provided to you on by the phone company to be certain that you have entered them correctly. Do not add anything to your SPIDs.

2. Note that there are no hyphens, dashes (- ), or spaces in SPIDs so the system will not allow you to enter any non- numeric characters. If your installer has included them in the SPID, ignore them.

3. For a list of known working SPIDs by Telephone Company see the appendix.

4. See section 7.3.2 for numerous tips about SPIDs and ISDN protocol settings.

5. If you have any questions about your SPIDs, call your phone company.

6. If you have PTP (AT&T Point- to- Point) or ETS300 (Euro- ISDN) Telco mode, you should not enter anything in the SPID fields.

HOT TIP!

The Directory Numbers or DNs (sometimes called Listed Directory Numbers or LDNs) are your 7- digit phone number as would be found in the Telephone Directory. They normally do not include the area code.

IMPORTANT!

Each directory number (DN) will correspond to one SPID. You must enter them to reflect this relationship. The DN corresponding to SPID1 must be entered as DN1 while the DN corresponding to SPID2 must be entered as DN2.

If you experience problems only with incoming calls check your DNs.

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3.4 Analog phone line setup (If you ordered an ISDN TWOx12 see section 3.3)

You can identify that your TWOx12 is equipped with POTS (analog) telephone lines by examining the rear panel. If four interface cards with three RJ-11 style connectors each are present (in slots A, B, C, & D), then the unit supports analog operation.

No configuration is necessary when POTS lines are used. In this case the Tel menu will look as follows:

Telco Settings

Audio Settings

Telco Natl.I-1 Slot A POTS Slot B POTS Slot C POTS

If you have a mixed system, you will see some slots labeled in this menu as “ISDN” rather than “POTS”. You’ll need to follow the steps in section 3.3 to configure those slots.

3.5 Is the ISDN working?

Successful initialization of a line will be indicated by the idle line state on the Desktop Director. The idle line state looks as follows:

Press the Status button then press the 6 button. You should see a screen that says Slot A - Status at the top. If you do not see this screen don’t panic, just repeatedly press the 5or 6

button until you see this screen. If you do not see “READY” for each ISDN channel on the Slot Status screens try turning

the unit off and then back on again. If you still do not get READY you may need to go back to section 3.3 and check both your ISDN settings and set-up information. If the information there does not help, there is in-depth troubleshooting information in section 8.

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IMPORTANT!

Users in the USA & Canada should see READY status for each line whenever the system is idle. On certain ETS- 300 ISDN lines the lines may go from READY to DEACTIVATED after an idle period. This is no cause for alarm and you can proceed with the following steps.

Once you see “READY ” for each channel on the appropriate Slot - Status screens we can proceed to make a call and verify that the ISDN lines are, in fact, working. We will start out with the simplest case, a call from your “line 1” to your “line 2”as follows:

• Confirm that the Desktop Director™ you will be using has power and says “Talent” at

the top of the screen. If it says “Producer” follow the directions in section 4.4.2 to change this Director to “Talent” mode.

• First pick up the handset and push each line button in the left row listening for dial

tone. If this does not happen see section 8 for information on troubleshooting your problem.

• Next, pick up the handset and press the left Line 1 button to select that line for dialing.

You should now hear dial tone on the handset.

• Enter the phone number for line 2 using the numeric keypad.

• You should now hear a ringing sound and see the ringing Status Symbol (an

expanding square) on Line 2. Push the right Line 2 button to answer this call. The

→ Icon should appear for line one.

• Drop this test call by pressing the right Drop button

• If this happens, your “lines” 1 and 2 are working (if you are using ISDN BRI circuits

you have now tested the first BRI). If this does not happen see section 8 for information on troubleshooting your problem.

• Now repeat this test by calling from “Line 2” to “Line 3”, “Line 3” to “Line 4” etc

until all lines have been tested.

• If you do not plan on proceeding to the next section and setting your levels now, be

sure to push the Drop button

HOT TIP!

Many phone lines have per- minute usage charges. Don’t forget to drop the call once your testing and configuration are complete.

after the final call.

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3.6 Levels, Levels, Levels

Ok, we assume that you just made a call to yourself in section 3.5, above (if not, please follow those steps now). Congratulations, you just have some tweaking to do and your basic installation & configuration will be complete!

• Bring up some audio on the console (mixing desk). Spoken word is best, as it tends

to have a lot of dynamics, but music will work. While tone will work for the coarse adjustments (set it to the red-green boundary point), we do not recommend using it for final adjustments. Adjust the levels on the board to the levels set by your typical operator! NOTE: If your board operators typically run “into the red”, you should do the same! For now make sure the faders for both of the hybrids are TURNED OFF.

IMPORTANT!

If your board operators typically run “in the red”, you should do the same!

TELOS TWOX12 USER’S MANUAL

• Set the left LED meter to STUDIO IN, if necessary, by pressing the button located

on this meter. You should see the audio from your console on these meters (the send-to-hybrid 1 audio will be on the LED bargraph labeled 1 and the send-tohybrid 2 will be on the LED bargraph labeled 2.

• Observe the levels on these two meters. You will note that the highest peak level

reading is represented by a “floating” LED that persists near the top of the meter. Since our goal is to set the levels so that peak levels do not hit 0dBfs, this peak reading is what we need to watch. Section 7.1 has more information on the TWOx12’s metering.

• First set the Input Gain selection found in the Audio Settings menu to a nominal

level close to that used in your facility (i.e. –7, 0, +4, or +8 dBu). This control sets the level for both inputs. If the inputs are not reading identically, you will need to adjust them at the output of the console. Note that the lower this sele ction is set, the higher the levels on the unit’s meters, as this setting represents nominal input level.

• Next adjust your console output (mixing desk) level (for the mix-minus) if

necessary. We suggest that you keep the peak level below a -4 to -6 reading, this will allow some room for error on the part of your operators. If you are using a tone to set levels you may need to set them considerably lower.

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Hot Tip!

If you have already determined the clipping point of your console, or are using AES/EBU, you can just select a level setting using the chart in section 7.3.1. Recall that the system allows for 13dB of headroom, regardless of the Input Gain setting, so you should select a setting that is 13dB below the clipping point of your board.

Of course if you already know the clipping point of your console you probably don’t need this advice!

• Set the right meter to STUDIO OUT, if necessary, by pressing the button located on

the meter. You should see the audio from the phone line on these LED bargraphs (since we are connected hybrid 1 to hybrid 2 the audio will be reversed. The audio sent to hybrid 1 will return on hybrid 2 and will be on the LED bargraph labeled 2 and the audio sent to hybrid 2 will return on hybrid 1 and will be on the LED bargraph labeled 1. Bring up the fader for hybrid 1 on your console.

• Adjust the TWOx12’s Output Gain adjustment found in the Audio Settings screen.

This sets the level for both outputs. Once you have set hybrid 1 pull that fader down and bring up the fader for hybrid 2. If the sources are not reading identically you will need to adjust the input trim of the console on one of the two input channels.

• You can drop the call you made in the previous section. Push the right Drop

button .

3.7 Time to test it out!

Ok, you made it! Another hour and you can go home for the day! First we will check that the mix-minus for each hybrid is correct. Then we will make a test call.

• Confirm that the Desktop Director you will be using has power and says “Talent”

at the top of the screen. If it says “Producer” follow the directions in section 4.1.3 to change this Director to “Talent” mode.

• Next, pick up the handset and press the left Line 1 button to select that line for

dialing. You should now hear dial tone on the handset.

• Enter the phone number for a telephone line which has audio present, using the dial

pad (calling either the time or weather service works well for this).

• Press the left Line 1 button and hang up the handset to place the call on hybrid 1.

• Bring up hybrid 1 on the console. You should hear the audio from the phone line.

• Look at the left meter on the TWOx12 and verify that this audio is not present on

the “1” LED bargraph. If this audio is present here you are not feeding hybrid 1 a mix-minus and you must fix this problem before you proceed.

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IMPORTANT!

If you are using one of the routing schemes that requires only a single mix- minus you should that case you can skip the next test.

See section 7.3.1 for detailed information about the TWOx12’s routing options.

Now we will verify the second mix-minus.

• Press right Line 2 button to move the call made above to hybrid 2.

• Bring up hybrid 2 on the console. You will hear the audio from the phone line.

• Look at the left meter on the TWOx12 and verify that this audio is not present on

have seen audio on either the “1” or “2” bargraphs in the previous test. In

not

the “2” LED bargraph. If this audio is present here you are not feeding hybrid 2 a mix-minus and you must fix this problem before you proceed.

• Drop the call by pushing the Drop button

Ok, now we just need to test the system as whole. We suggest calling your spouse or partner and reporting that you will be home for dinner after all!

1. Confirm that the Desktop Director you will be using has power and says “Talent”

at the top of the screen. If it says “Producer” follow the directions in section 4.1.3 to change this Director to “Talent” mode.

2. Press the left Line 1 button to select that line for dialing. You should now hear dial

tone through the console (mixing desk).

3. Enter the phone number for the line you wish to call.

4. Bring up hybrid 1 on the console. You will hear the audio from the phone line.

5. Put on some headphones, bring up the microphone, and greet the party at the far

end.

6. Your voice should sound normal in your headphones, without any tinny or hollow

artifacts, and the caller should sound clear.

7. Move the call to Hybrid 2 by pressing the right Line 1.

8. Repeat steps 4 through 6 using hybrid 2.

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What now?

Your basic installation is complete. Next you will want to look over other sections of this manual to familiarize yourself with the system and decide how to set up the following parameters:

TELOS TWOX12 USER’S MANUAL

• Desktop Director Setup See section 4

• Desktop Director Operation (Talent mode) See section 6

• Desktop Director Operation (Producer Mode) See section 5

• Receive EQ, AGC & Noise Gate See section 7.5

• Duplex Level (caller ducking) See section 7.5

• Feedback Control (when using open speakers) See section 7.5

• Send EQ, AGC See section 7.5

• Internal Audio Routing See section 7.3.1

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4 Desktop Director™- General operation

4.1 General Description

The Telos Desktop Director™ acts as a studio telephone while at the same time acts as a control surface for putting lines on either of the Telos TWOx12’s built-in hybrids. The Desktop Director™ has two modes of operation – Producer (Screener) mode and Talent mode. This section gives general information while sections 5 and 6 give complete details on using the TWOx12 and Desktop Director™ in Producer and Talent modes, respectively.

Those sections should be duplicated and distributed for your staff to read.

4.2 Status Symbol™ Icons & What They Mean

The Desktop Director™ breaks new ground in broadcast telephone control surfaces with the use of easy to understand Status Symbol™ Icons displayed on the LCD matrixes located between the two rows of line selectors. In most cases the meaning of each symbol is easily and effortless understood without study. However, to be complete, here is what each sequence means.

This line is on-hook ready for incoming or outgoing calls (Idle)

This line is in use by another studio

Line is ringing

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Call is on hold

Call is On-Air – Caller 1 Fader

Call is On-Air – Caller 2 Fader

Call is On-Air & Locked – Caller 1 Fader.

Call is in locked mode and cannot be dropped or placed on hold. To unlock, push button to

the left of this ICON.

Call is On-Air & Locked – Caller 2 Fader.

Call is in locked mode and cannot be dropped or placed on hold. To unlock, push the

button to the Right of this ICON.

Call is on hold and has been screened.

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Call is on hold, has been screened, and is Next.

Press Next button to put this line On-Air

Busy All Mode.

Press X Button to cancel

4.3 Buttons

The functions of most of the buttons are self evident. Again, we have used easy to understand symbols wherever possible. A brief explanations of the buttons follows:

Handset Mode.

Call is on the handset

Speakerphone Mode.

Call is on the speakerphone

Line is not operational

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IMPORTANT!

Since certain functions work differently in “ important that your staff understand that there are two modes, and how to switch between them. This is covered later in this section (see menu navigation) and again in sections 5 and 6.

4.3.1 Line Control Buttons

Line buttons-

These work differently depending if the Desktop Director™ is in Talent or Producer mode.

In Talent mode each line has 2 buttons, the left row for Caller 1 (or whatever you choose to label the fader for hybrid 1) and right row called Caller 2. Pressing a line button places the caller on that line on-air on the corresponding hybrid.

Pressing a Line button when caller is already on-air locks the caller. To unlock press that Line button a third time.

TELOS TWOX12 USER’S MANUAL

Talent”

versus “

Producer”

mode it is

If the handset is picked up, or the LED next to the Handfree button is illuminated, the Left row of buttons will control the line to be used on the telephone. The right row of buttons will continue to control the caller 2 hybrid as usual. To place a caller currently on the handset on the air, press either the left (caller 1 hybrid) or right (caller 2 hybrid).

In Producer mode the left row of buttons is used to answer calls on the handset (or headset). The right row of buttons is used to select which call is “next” when the talent press the next button..

Hold & Drop

(Hold) and (Drop) - You know what these do! In Talent mode these affect

only the corresponding bank of buttons above them. A locked line will not be affected unless you unlock it first (by pushing the corresponding LINE button). All unlocked lines in that column will be dropped.

In Producer mode the left hold button is normal hold while the right hold button places a caller on “screened hold”. For more details on how screened hold works see the section on the Next button, below. This right-hand hold button may be replaced

by with a keycap labeled with a check mark will be used primarily for screening.

if the Desktop Director in question

(Next) button- This button works differently in Producer versus Talent mode.

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In Talent mode this button will direct the call designated by the screener as NEXT to Caller 1 hybrid. If no call is currently designated NEXT the call which has been on Screened Hold the longest will be directed to the Caller 1 hybrid. If a screener is not used, the line which has been ringing longest will be selected instead. If no line is ringing, the line on hold the longest will be selected.

Note that if the handset is off-hook the caller will be directed to the handset, using the same priorities outlined above.

In Producer mode this button will select the line which has been ringing longest. If no line is ringing, it selects the line that has been on (standard) hold longest.

Busy All

(Busy All) - Pressing this key will clear all lines with the only exceptions being lines on-air, on the handset and lines on hold. Unlocked lines on-air, lines on hold, and lines on screened hold will be dropped. Those lines will then be blocked from accepting any calls (in most cases the caller will get a busy signal, but this will not always be true depending on your configuration) and the Busy All Status Symbol™ will be displayed.

Pressing configurations callers attempting to call while you are in the Busy All state will hear ringing. In that case the system will answer and drop those callers when you cancel busy all mode).

HOT TIP!

As you may know, there have been several lawsuits regarding to the “fairness” of radio contests. By consistently activating the Busy All feature before announcing a contest your staff will reduce the liability for the station.

again will clear the lines and allow incoming calls (in some

4.3.2 Telephone Mode Buttons

Dial pad buttons

These are used for dialing out, as with any telephone. They remain active during a call for use accessing voice mail and other services.

Speaker phone button

(Speaker phone) – This button places a call that is on the handset onto this Desktop Director’s built-in speaker phone. If the handset is on-hook this button places the next line selected on the left column on the speaker phone.

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Mute button

(Mute) – This button mutes the handset microphone and hands free microphone on the Desktop Director™. The LED beside this button will light to indicate that these microphones are muted. Pressing this button again will cancel the muting function.

This button is unimplemented and therefore has no function!

4.3.3 User Function Buttons –

These buttons can be used for control of equipment external to the Telos phone system. For instance the ?#@! button may used to control your obscenity delay dump, etc.

For details on the output circuitry and pin-outs for these buttons see section 2.9.1.

(user button) – This button controls an output on the parallel control port. This output will go low for the duration that the button is pressed. This output can control equipment external to the TWOx12 such as the “delay dump” input on an obscenity delay unit.

(Record Control) – This button is used in conjunction with an external recorder. Pressing this button once cause the Record Start output (pin 3) on the Parallel Control Port to go true for 1 second. The LED next to this button should now illuminate.

Pressing the record control button again will cause the Record Stop output (pin 4) on the Parallel Control Port to go true for 1 second. The LED next to this button should now go out.

For details on the electrical characteristics of these outputs please see section 2.9.1.

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4.4 Desktop Director™ LCD Screen & Menu Navigation Buttons

The LCD status is used for general status information and for configuring the Desktop Director™. Items can be selected and changed using the 6 buttons immediately below the LCD screen. The buttons in the row immediately below the LCD screen are “soft buttons”. The function of these buttons will be indicated on the bottom row of the screen.

Talent

MODE HELP VOLUME

The default Desktop Director LCD Screen

IMPORTANT!

Since certain functions work differently in “ important that your staff understand that there are two modes, and how to switch between them. This is covered below and again in sections 5 and 6.

Talent”

versus “

Producer”

mode it is

4.4.1 Menu Navigation

The LCD screen and menu navigation buttons are used to set volume settings, LCD screen backlight and contrast, and to select the “mode” for a particular Desktop Director™. The function of the three “soft keys” immediately below the LCD screen will vary depending on context and will always be displayed on the screen. In most cases the center soft key offers context sensitive HELP and the left softkey offers a BACK function. The BACK function takes you back to the default screen without saving unconfirmed changes.

The 6 & 5 buttons scroll through the options in a menu while the Select button chooses a menu selection or confirms an entry. In the volume menus 6decreases the volume while 5 increases it. The change in volume takes place immediately.

Pressing the Desktop Director’s Select button will permanently store this setting.

4.4.2 Changing from Producer to Talent mode

At any given time each Desktop Director™ is in either Producer or Talent mode. This can be changed at any time for each Director in the system. Producer mode can be thought of as “Screener phone” mode while Talent mode can be thought of as “onair control” mode. As discussed earlier, the function of certain buttons is different in these two modes. To change from Producer mode to Talent mode:

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• Press the soft key button below the word MODE. You should now see a

screen that looks similar to the following.

Configuration Menu

Director Mode Contrast Backlight

BACK HELP

• Now press the 6once. The words Director Mode should be highlighted by a

grey cursor bar and the black text will change to white.

• Now press the SELECT button

• You will now see a screen that looks like:

ENTER <= or => TO CHANGE

Producer

BACK HELP

• Press 6 or 5 to change the setting. Note that the little switch on left of the

screen moves up or down as you change the setting.

• Press SELECT to confirm your choice or just press the soft key below the

word BACK to return the main menu without the change taking effect.

4.4.3 Volume Menus

Pressing the soft key button below the word VOLUME will display one of the following screens. Pressing that soft key repeatedly will cycle through the following screens.

Speaker Volume

IIIIIIIIIIIIIIIIIIIIIII

6DOWN 5 UP

BACK HELP HANDSET

Handset Volume

IIIIIIIIIIIIIIIIIIIIIII

6DOWN 5 UP

BACK HELP RINGER

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Ringer Volume

IIIIIIIIIIIIIIIIIIIIIII

6DOWN 5 UP

BACK HELP SPEAKER

Pressing 6 will decrease, while pressing 5 will increase the volume level for the item displayed. The change will take place immediately and confirmation is not required. Pressing the soft key button under the word BACK or the SELECT button will return you to the main screen. The following volume levels can each be individually adjusted:

• Handset This sets the level of the caller on the handset. If you are using a headset attached

to the Desktop Director this will adjust the level in the headset as well.

• Ringer This adjusts the volume of the ringer. Note that the ringer will usually be turned

off whenever a microphone channel is on. See section 2.9.1 for information on the ringer mute input.

• Speaker This adjusts the level of the built in speaker for the Desktop Director’s hands-free

option.

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5 Telos Desktop Director™ - G uide for Call Scr eeners

(Copy and distribute this information to your staff)

5.1 General Description

The Telos Desktop Director™ acts as a studio telephone or it acts as a control surface for putting lines on either of the Telos TWOx12’s built-in hybrids. The Desktop Director™ has two modes of operation – Producer (screener) mode and Talent mode. Section 4 gives general information while sections 5 and 6 give complete details on using the TWOx12 and Desktop Director™ in Producer and Talent modes, respectively.

These sections should be duplicated and distributed for your staff to read.

5.2 Status Symbol™ Icons & What They Mean

The Desktop Director breaks new ground in broadcast telephone control surfaces with the use of easy to understand Status Symbol™ Icons displayed on the LCD matrixes located between the two rows of line selectors. In most cases the meaning of each symbol is easily and effortless understood without study. However, to be complete, here is what each sequence means.

This line is on-hook ready for incoming or outgoing calls (Idle)

This line is in use by another studio

Line is ringing

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Call is on hold

Call is On-Air – Caller 1 Fader

Call is On-Air – Caller 2 Fader

Call is On-Air & Locked – Caller 1 Fader.

Call is in locked mode and cannot be dropped or placed on hold.

Call is On-Air & Locked – Caller 2 Fader.

Call is in locked mode and cannot be dropped or placed on hold.

Call is on hold and has been screened.

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Call is on hold, has been screened, and is Next.

Busy All Mode.

Press X Button to cancel

Handset Mode.

Call is on the handset

Speakerphone Mode.

Call is on the speakerphone

Line is not operational

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5.3 Buttons

The functions of most of the buttons are self evident. Again, we have used easy to understand symbols wherever possible. A brief explanations of the buttons follows:

IMPORTANT!

Since certain functions work differently in “ mode it is important that you understand that there are two modes, and how to switch between them. This is covered later in this section (see menu navigation).

5.3.1 Line Control Buttons