TOA TS-770 CU Instructions

OPERATING INSTRUCTIONS

CONFERENCE SYSTEM TS-770 SERIES

TS-770

TS-771

TS-772

TS-775

Thank you for purchasing TOA's Conference system.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

TS-770 (CENTRAL UNIT)
TS-771 (CHAIRMAN UNIT)
TS-772 (DELEGATE UNIT)
TS-773 (MICROPHONE)
TS-774 (MICROPHONE)

TS-775 (REMOTE DELEGATE INTERFACE UNIT)
YR-770-2M (2 m EXTENSION CORD)
YR-770-10M (10 m EXTENSION CORD)

2

TABLE OF CONTENTS

1. IMPORTANT SAFETY INSTRUCTIONS ..................................................... 3

2. SAFETY PRECAUTIONS ................................................................................. 4

3. GENERAL DESCRIPTION .............................................................................. 6

4. FEATURES ........................................................................................................... 6

5. NOMENCLATURE AND FUNCTIONS

5.1. TS-770 Central Unit ........................................................................................... 7

5.2. TS-771 Chairman Unit and TS-772 Delegate Unit ............................................. 9

5.3. TS-775 Remote Delegate Interface Unit .......................................................... 11

6. OPERATING CHAIRMAN AND DELEGATE UNITS

6.1. Making Speech ................................................................................................ 12

6.2. Making Priority Speech (Chairman Unit TS-771 Only) ..................................... 13

7. HOLDING REMOTE CONFERENCES

7.1. Remote Conference Procedures ...................................................................... 14

7.2. Speech Operation When the Remote Delegate Interface Unit

Is Set to AUTO Mode ....................................................................................... 14

7.3. Speech Operation When the Remote Delegate Interface Unit

Is Set to MANUAL Mode .................................................................................. 15

7.4. Setting Examples ............................................................................................. 15

8. FUNCTION SETTINGS

8.1. Speaker Restriction Function

8.1.1. Setting procedure ................................................................................... 16

8.1.2. Restricted number of simultaneously operable Delegate units

and each conference unit's operation .................................................... 16

8.2. Automatic Mic-Off Function .............................................................................. 17

8.3 All Mic-On Function ........................................................................................... 17

9. RECORDING

9.1. Recording with the Central Unit ....................................................................... 18

9.2. Recording with the Chairman Unit or Delegate Unit ........................................ 18

10. INSTALLATION AND CONNECTION

10.1. Connection Example ...................................................................................... 19

10.2. Installation Procedures ................................................................................... 20

10.3. Basic System Installation and Adjustment

10.3.1. Connecting the Chairman and Delegate units to the Central unit ...... 21

10.3.2. Setting functions and adjusting Chairman and Delegate units

sound output volume .......................................................................... 23

11. IF USING MULTIPLE CENTRAL UNITS: .................................................. 25

12. WHEN HOLDING REMOTE CONFERENCES: ...................................... 26

13. BLOCK DIAGRAMS

13.1. TS-770 Central Unit ....................................................................................... 29

13.2. TS-771 Chairman Unit ................................................................................... 29

13.3. TS-772 Delegate Unit ..................................................................................... 30

13.4. TS-775 Remote Delegate Interface Unit ........................................................ 30

14. SPECIFICATIONS

14.1. TS-770 Central Unit ....................................................................................... 31

14.2. TS-771 Chairman Unit and TS-772 Delegate Unit ......................................... 31

14.3. TS-773 and TS-774 Microphones .................................................................. 32

14.4. TS-775 Remote Delegate Interface Unit ........................................................ 32

14.5. YR-770-2M 2 m Extension Cord and YR-770-10M 10 m Extension Cord ..... 32

3

1. IMPORTANT SAFETY INSTRUCTIONS

• Read these instructions.

• Keep these instructions.

• Heed all warnings.

• Follow all instructions.

• Do not use this apparatus near water.

• Clean only with dry cloth.

• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.

• Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.

• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.

• Only use attachments/accessories specified by the manufacturer.

• Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer,
or sold with the apparatus. When a cart is used, use caution when moving the
cart/apparatus combination to avoid injury from tip-over.

• Unplug this apparatus during lightning storms or when unused for long periods of time.

• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.

4

When Installing the Unit

• Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.

• Use the unit only with the voltage specified on the
unit. Using a voltage higher than that which is
specified may result in fire or electric shock. (TS­770 only)

• Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock. (TS-770 only)

• Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down and causing personal injury and/or property
damage.

• Since the unit is designed for in-door use, do not
install it outdoors. If installed outdoors, the aging of
parts causes the unit to fall off, resulting in personal
injury. Also, when it gets wet with rain, there is a
danger of electric shock.

When the Unit is in Use

• Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest TOA dealer. Make no further
attempt to operate the unit in this condition as this
may cause fire or electric shock.

· If you detect smoke or a strange smell coming
from the unit.

· If water or any metallic object gets into the unit

· If the unit falls, or the unit case breaks

· If the power supply cord is damaged (exposure of
the core, disconnection, etc.) (TS-770 only)

· If it is malfunctioning (no tone sounds.)

• To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
qualified service personnel.

• Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.

• Do not insert nor drop metallic objects or
flammable materials in the ventilation slots of the
unit's cover as this may result in fire or electric
shock.

• Do not touch a power supply plug during thunder
and lightning, as this may result in electric shock.
(TS-770 only)

• The apparatus shall be connected to a mains
socket outlet with a protective earthing connection.
(TS-770 only)

• L'appareil doit être branché à une prise
d'alimentation avec mise à la terre de protection.
(TS-770 uniquement)

• The socket-outlet shall be installed near the
equipment and the plug (disconnecting device)
shall be easily accessible. (TS-770 only)

• La prise doit être installée à proximité de
l'équipement et la fiche (dispositif de déconnexion)
doit être facilement accessible. (TS-770 uniquement)

2. SAFETY PRECAUTIONS

• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe
operation.

• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or
cautions regarding safety.

• After reading, keep this manual handy for future reference.

Safety Symbol and Message Conventions

Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.

WARNING

Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.

Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.

WARNING

CAUTION

5

CAUTION

When Installing the Unit

• Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock. (TS-770 only)

• When unplugging the power supply cord, be sure
to grasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged
power supply cord may cause a fire or electric
shock. (TS-770 only)

• When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull. (TS-770 only)

• Do not block the ventilation slots in the unit's cover.
Doing so may cause heat to build up inside the unit
and result in fire. Also, periodically clean the
ventilation slots of dust. (TS-770 only)

• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.

When the Unit is in Use

• Contact your TOA dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result. (TS-770 only)

• If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely. (TS-770 only)

• Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock. (TS-770 only)

The lighting flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user
to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of
important operation and maintenance (servicing) instruction in the literature accompanying the
appliance.

6

3. GENERAL DESCRIPTION

The TS-770 Series conference system is designed for quick and easy installation and storage.
The system can be installed by merely connecting conference units* to the TS-770 Central unit.
The use of the Remote Delegate Interface unit permits a party in remote location to participate in the
conference.

* Collective name of the following 3 models: TS-771 Chairman Unit, TS-772 Delegate Unit, and TS-775

Remote Delegate Interface Unit.

4. FEATURES

• Conference speech can be amplified by simply connecting the Chairman and Delegate units to the Central
unit.

• Connecting the Remote Delegate Interface unit to the system allows conferences to be held between remote
locations via telephone lines or PCs.

• Up to 70 conference units can be connected per Central unit. (35 units per line x 2 lines.)

• Up to 3 Central units and up to 210 conference units can be connected per system.

• Optional 2-meter and 10-meter extension cables allow wiring suitable to local installation conditions.

• Either the TS-773 or TS-774 Microphone can be used with the TS-771 Chairman unit and the TS-772
Delegate unit.

• Because the microphone for both the Chairman and Delegate units is detachable, both units can be stored
without taking up much space.

• Test function allows easy confirmation of connections between conference units.

• The number of simultaneously operable Delegate units can be limited using the Speaker Restriction
function. (Can be set to 0, 1, 3 or 6 units.)

• Even if the speaker forgets to turn off his or her microphone after speech completion, the Automatic Mic-Off
function automatically switches off the microphone after a preset interval elapses. (Can be set to OFF, 20 or
40 seconds.)

• Conference contents can be recorded using a recording equipment.

• All Mic-On function allows conferences to be held without requiring talk key operation. (A dedicated function
for conference recording.)

7

5. NOMENCLATURE AND FUNCTIONS

5.1. TS-770 Central Unit

[Front]

1. Power indicator [POWER]

Lights when the power switch (11) on the rear
panel is set to the ON position.

2. Microphone volume control [MIC]

Adjusts the volume of the microphone connected
to the microphone input jack (7).

3. AUX volume control [AUX]

Adjusts the volume of equipment connected to
AUX input jack (8).

4. Line volume control [LINE]

Adjusts the volume of the conference unit's built-in
speaker.

5. Speaker restriction switch [MIC LIMITER]

Sets the number of delegate units that can be
used simultaneously.

6. Automatic mic-off setting switch [TIME OUT]

It is possible to set the conference unit's
microphone to be automatically turned off after
speech completion.

7. Mic input jack [MIC]

Connects to a microphone.
(600 Ω, –60 dB*, unbalanced)

8. AUX input jack [AUX]

Connects to a CD or cassette deck.
(10 kΩ, –20 dB*, unbalanced)

9. Test/All Mic-On Switch [TEST/MIC ON]

Setting this switch to the ON position turns on
the microphones of all conference units. This
switch is intended for testing purposes during
installation, as well as for open conferences in
which speech can be made freely from any
conference unit.

10. Test/All Mic-On Indicator

Lights when the Test/All Mic-On switch is set to
the ON position.

* 0 dB = 1 V

2 3 4 5 6

7 8 9

1

CENTRAL UNIT TS-770

10

8

[Rear]

11. Power switch [POWER]

Power is switched on and off with each
depression of this switch.

12. Expansion Switch [EXPANSION/MAIN]

Used when expanding the Central unit.
(Equipped with a lock mechanism.) Set this
switch to the EXPANSION position if expanded.

13. Expansion IN/OUT terminals [EXT 1/2]

Connect to the Central unit(s) to be expanded.

14. LINE 1 connection terminal [LINE 1]

Connects to the conference unit. Up to 35
conference units can be connected per line.

15. LINE 2 connection terminal [LINE 2]

Connects to the conference unit. Up to 35
conference units can be connected per line.

16. Recording output terminal [REC OUT]

(Phone jack)

Connects to an Alternating cassette recorder,
etc. (10 kΩ, –20 dB*, unbalanced)

17. Recording output terminals [REC OUT]
(RCA jack)

Connect to a recording machine.
(10 kΩ, –20 dB*, unbalanced)

18. AC inlet

Connects to the supplied power cord.

19. Equalizer insertion input terminal
[EQUALIZER IN]

Connects to the output terminal of equalizer.
(10 kΩ, –20 dB*, unbalanced)

20. Equalizer insertion output terminal
[EQUALIZER OUT]

Connects to the input terminal of equalizer.
(10 kΩ, –20 dB*, unbalanced)

21. Equalizer insertion switch
[EQUALIZER ON/OFF]

Set to the ON position when using the equalizer.

* 0 dB = 1 V

12 13 14 15 16 17

11 18 19 20 21

9

5.2. TS-771 Chairman Unit and TS-772 Delegate Unit

[TS-771 Top] [TS-772 Top]

1. Line connection cord

Connect this cord to the Line Connection terminal
of the Central unit or that of the next preceding
linked conference unit.

2. Microphone connection connector

Connects to the TS-773 or TS-774 Microphone.

3. Speaker

Outputs other speakers' voices. Adjust the volume
with the TS-770 Central unit's line volume control.
The built-in speaker is temporarily disabled while
speech is made using this unit.

4. Microphone in-use indicator

Lights when the microphone can be used.

5. Priority key [PRIORITY] (TS-771 only)

While this key is pressed, the microphone in-use
indicator remains lit, allowing priority speech to go
through. In this case, no other conference units
can be used. Pressing this key causes a single
tone chime to sound at the remaining conference
units.

6. Talk key [TALK]

Press this key to speak. The microphone in-use
indicator lights. Press this key again to turn off the
microphone. The microphone in-use indicator
extinguishes.

1

2

1

3

TS-771

PRIORITY TALK

4

5 6

2

3

TS-772

TALK

4

6

10

[TS-771/TS-772 Side]

7. Volume control

Adjusts the sound volume from the
Recording/Headphone Output Terminal.

Note

Use the volume control of the TS-770 Central unit
to adjust the sound output volume from the
internal speaker (3).

8. Recording/Headphone output terminals

[HEADPHONES]

Connect recording equipment or headphones to
these terminals. No sound is output from the
internal speaker (3) while this terminal is in use.

[TS-771/TS-772 Rear]

9. Line connection terminal [LINE]

Connect the following linked conference unit's
line connection cord to this terminal.

10. Control output terminal
[CONTROL OUTPUT]

This terminal is an open collector output
interlocked with the Microphone in-use indicator,
and is enabled when in speech mode.
(24 V DC, Max. 50 mA)

9

10

7 8

11

5.3. TS-775 Remote Delegate Interface Unit

[Front]

1. Modular jack [HANDSET MODULAR]

Used to connect a telephone equipped with a
handset using modular connectors.

* Detach the handset from the telephone and

connect the Remote Delegate Interface unit to
the telephone instead.

2. Handset selector switch [HANDSET TYPE]

Set this switch to either the A or B position
depending on the type of telephone handset.

3. Microphone input terminal [INPUT –50 dBV]

Connect this terminal to the PC's headphone
output.

4. Speaker output terminal [OUTPUT –40 dBV]

Connect this terminal to the PC's microphone
input.

5. Microphone input volume control [INPUT]

Adjusts the microphone input volume.

6. Speaker output volume control [OUTPUT]

Adjusts the speaker output volume.

7. Speech Indicator

Lights when a remote party is allowed to speak.

8. Auto/Manual selector switch [AUTO/MANUAL]

Setting this switch to the AUTO position permits
the remote party to speak without requiring Talk
key operation.
The MANUAL position only permits the party to
speak when the Talk key is pressed.

9. Talk key [TALK]

Used to enable speech when the Auto/Manual
Selector switch is set to the MANUAL position.
Speech is alternately enabled and disabled with
each press of this key.

[Rear]

10. Line connection cord

Connect this cord to the Central unit or to the
next preceding linked conference unit.

11. Line connection terminal [LINE]

Connect this terminal to the following linked
conference unit.

12. Control output terminal
[CONTROL OUTPUT]

Output is closed ("make") when in speech mode.
(24 V DC, Max. 50 mA)

1

2 3 4 5 6 7 8 9

10 11 12

12

6. OPERATING CHAIRMAN AND DELEGATE UNITS

This section explains how to operate these units when the All Mic-On function is set to OFF (default setting).
When this function is set to ON, speakers can talk anytime from any conference unit with no need to operate
any switches or keys.
To enable or disable this function, use the Test/All Mic-On switch on the Central unit. (Refer to p. 17.)

6.1. Making Speech

Step 1. Press the TALK key once.

The microphone in-use indicator lights, and the
microphone turns on.

Notes

• No sound is output from the internal speaker of the
operated unit while the Microphone in-use indicator
remains lit. However, audio signal is output from the
Recording/Headphone output terminal.

• While the Chairman unit is in priority speech mode
(see page 13), other unit's microphones do not turn on
even if their Talk keys are pressed.

• The microphones of some Delegate units may not turn
on even if their Talk keys are pressed, depending on
the setting of the Speaker Restriction function (see
page 16).

Step 2. Speak into the microphone.

Step 3. Press the Talk key again after speech completion.

The Microphone in-use indicator extinguishes and sound
is audible from the operated unit's speaker.

[Example: TS-772 Delegate unit]

Microphone in-use indicator: Lights.

TS-772

TALK

Microphone in-use indicator: Extinguishes.

TS-772

TALK

13

6.2. Making Priority Speech (Chairman Unit TS-771 Only)

Holding down the priority key on the Chairman unit gives that unit speech priority and allows it to interrupt
other delegate units.

Step 1. Press the Priority key.

The microphone in-use indicator lights, and the microphone
turns on. Pressing this key causes a single tone chime to
sound at the remaining conference units.

Note

No sound is output from the internal speaker of the
operated unit while the Microphone in-use indicator remains
lit. However, audio signal is output from the
Recording/Headphone output terminal.

Step 2. Speak while holding down the Priority key.

No delegate units can be used while the Priority key is
pressed.

Step 3. The microphone in-use indicator extinguishes, turning on

the built-in speaker.

Notes

• In the system employing 2 or 3 chairman units, even while 1 unit is making priority speech, other chairman
unit(s) can also make priority speech by pressing the Priority key although a single-tone chime is not
sounded.

• Any previous speech that has been interrupted by the priority speech is not restored even after priority
speech completion. Press the Talk key again, and make a speech after microphone in-use indicator lights.

• When the Remote Delegate Interface unit is set to Auto mode, if the Chairman unit's priority key is pressed
while a remote party is speaking, the Chairman unit can speak but cannot interrupt the remote party's
speech in progress.

Microphone in-use indicator: Lights.

PRIORITY TALK

TS-771

14

7. HOLDING REMOTE CONFERENCES

Using the TS-775 Remote Delegate Interface unit instead of the Delegate unit permits a remote party to
participate in conferences via telephone or PC.

7.1. Remote Conference Procedures

Step 1. Set the telephones or PCs in both the conference room and remote locations to conversation mode,

then connect the telephone or PC in the conference room to the Remote Delegate Interface unit.
For details, refer to p. 26.

Step 2. Set the Remote Delegate unit's Auto/Manual Selector switch to "AUTO" or "MANUAL," whichever is

suitable for the type of conference. Depending on the selected switch position, the method of enabling
speech differs.
However, when the Central unit's All Mic-On function is set to ON, any conference unit can speak at
any time without requiring any key operation.

7.2. Speech Operation When the Remote Delegate Interface Unit Is Set to AUTO Mode

If speech is initiated while nobody else is speaking, the Remote Delegate Interface unit detects the speaker's
audio signal and automatically switches to speech mode (the unit's Speech indicator lights). After speech is
completed, the speech mode is reset and the Speech indicator extinguishes.

Regardless of the setting of the Speaker Restriction function (see page 16), provided nobody else is speaking,
the speaker's audio signal is detected and the speaker is allowed to speak.

Speech made through the Remote Delegate Interface unit is not interrupted even if the Chairman unit's priority
key (see the next page) is pressed during the speech.

Note

This unit is disabled for speech if another party is already speaking.

TS-775
Remote Delegate Interface Unit

Auto/Manual Selector switch
(Factory default: AUTO)

[Conference room] [Remote location]

TS-775
Remote Delegate Interface Unit

Shift to the "AUTO."

The speech indicator lights.

Speak while nobody else is speaking.

15

7.3. Speech Operation When the Remote Delegate Interface Unit Is Set to MANUAL Mode

The remote party is permitted to speak when the Remote Delegate Interface unit's Talk key is pressed, and
cannot speak when the key is pressed again.

Set the unit to MANUAL mode to enable the chairman or other parties in the conference room to prevent a
remote party from freely speaking. In the MANUAL mode, the number of simultaneously operable Delegate
units can be limited (Speaker Restriction function - see page 16).

7.4. Setting Examples

Step 1. Select MANUAL mode to extinguish the speech indicator when it is desirable to prohibit remote

conference participants from speaking.

Step 2. When a remote participant requests permission to speak, press the Talk key to enable speech or shift

the AUTO/MANUAL Selector switch to the AUTO position so that the participant may speak at any
time. Select either position according to the circumstances.

[Conference room] [Remote location]

TS-775
Remote Delegate Interface Unit

The speech indicator lights.

Shift to the "MANUAL."

Press the Talk key.

Speak while the Talk key is
turned on.

[Remote location][Conference room]

TS-775
Remote Delegate Interface Unit

Shift to the "MANUAL."

Speech indicator is extinguished.

Speaking is prohibited.

[Conference room]

TS-775

[Remote location]

Shift to the "MANUAL."

The speech indicator lights if the Talk key is pressed.

Press the Talk key.

or

Make speech.

Shift to the "AUTO."

The Speech indicator lights if a remote participant speaks.

16

8. FUNCTION SETTINGS

8.1. Speaker Restriction Function

8.1.1. Setting procedure

Using the TS-770 Central Unit's speaker restriction switch, set the number of simultaneously-usable delegate
units (TS-772). Set the switch to 0, 1, 3, or 6 depending on the type of conference.
Delegate units cannot speak if the number is set to "0." (Chairman Priority mode)

Note

When multiple Central units are connected, different settings cannot be applied for each unit. If settings differ
among these Central units, only the setting of the unit with its Expansion switch set to MAIN takes effect.

8.1.2. Restricted number of simultaneously operable Delegate units and each conference unit's operation

Shown below is the relationship between the Speaker Restriction function and each conference unit's speech
capability.

[Chairman unit]

Chairman units can speak at any time regardless of the setting of the Speaker Restriction function.

[Delegate unit]

Up to the set number of Delegate units can speak simultaneously.
When the full set number of Delegate units are in use (their microphones have been turned on), no
microphones of other Delegate units can be turned on, even if their Talk keys are pressed.

[Remote Delegate Interface unit]

Speech capability differs depending on the Auto/Manual selector switch setting.

• Auto position: A remote party can speak regardless of the setting of the Speaker Restriction function,

provided another conference unit is not currently in use.

• Manual position: The Remote Delegate Interface unit is also recognized as one of the Delegate units. Up to

the set number of Delegate units, inclusive of the Remote Delegate Interface unit, can be
simultaneously used.

TS-770 Central Unit

CENTRAL UNIT TS-770

Speaker restriction switch
(Factory default: 6)

17

8.2. Automatic Mic-Off Function

Using the Automatic mic-off setting switch of the TS-770 Central Unit, the automatic mic-off function can be
set. Whenever a break in speech exceeds a specified period of time, the Central unit presumes speech
completion and automatically turns off the microphone. Delegate unit's microphone turns off after the preset
period of time even if a speaker forgets to turn it off after use.
The break time can be set for either 20 (20s position) or 40 (40s position) seconds. Set the switch to OFF if
this function is unnecessary.

8.3 All Mic-On Function

It is possible to turn on the microphones of all connected conference units by setting the Central unit's All Mic­On switch to ON. In this event, no sound is output from Chairman and Delegate unit's internal speakers,
however audio signals are output from their Recording/Headphone Output terminals.
All conference units can speak at any time without requiring Talk key operation, regardless of the Speaker
Restriction function setting. The All Mic-On function is especially useful when wishing to record small
conferences or broadcast conference contents to other areas.

Note

When the All Mic-On function is enabled and it is desirable to have a remote party speak by way of the
Remote Delegate Interface unit, be sure to set the unit's Auto/Manual Selector switch to MANUAL. The party
cannot speak if the switch is set to AUTO.

Notes

• When the automatic mic-off function is selected, any break in speech exceeding the preset time during
speech will automatically turn off the microphone. Therefore, for conferences in which long breaks in speech
are expected, set the automatic mic-off setting switch to the OFF position.

• In areas with high levels of background noise, the Central unit may mistake the noise to be speech and the
automatic mic-off function will not operate correctly. In such cases, this function should be disabled by
placing the switch in the OFF position.

• In the system employing 2 or 3 Central units, it is not possible to operate the units with each different setting.
Perform the same setting for all connected Central units.

TS-770 Central Unit

Automatic mic-off setting switch

CENTRAL UNIT TS-770

(Factory default: OFF)

TS-770 Central Unit

All Mic-On indicator

CENTRAL UNIT TS-770

All Mic-On switch (Factory preset: OFF)

18

9. RECORDING

The contents of the conference can be recorded by connecting an Alternate Cassette Recorder or other
recording equipment to the TS-770 Central Unit, TS-771 Chairman Unit, or TS-772 Delegate Unit.

9.1. Recording with the Central Unit

Step 1. Connect the recording output on the rear panel of the TS-770 Central Unit to the recorder's recording

input.
There are 2 types of recording output terminals: one is of a phone jack and the other is of RCA jacks.
Select either type of jack according to equipment to be connected.

Note

Prepare the connection cables separately.

Step 2. Connect a set of headphones into the recorder's monitor output to confirm that the contents of the

conference are being recorded correctly.
If the recording device is equipped with a recording level control, adjust it to an appropriate recording
level.
For use of recording device, refer to the instruction manual supplied with the device.

9.2. Recording with the Chairman Unit or Delegate Unit

Using the Recording/Headphone Output terminals on the side panel, recordings can be made in the same
manner used for the Central unit.

Notes

• If either of Recording/Headphone jacks 1 and 2 is used, no sound is output from the unit's speaker.

• Sound volume from the recording output of the Chairman and Delegate units can be adjusted using the
Central unit's Line Volume control. Setting the line volume control to the minimum position makes it
impossible to record from the recording output of the Chairman and Delegate units. When wishing to record
conference contents without amplifying the sound output from the Chairman and Delegate unit speakers,
use the Central unit's Recording Output terminals.

TS-770 Central Unit

Recording output terminals
(RCA jacks)

Recording output terminal
(Phone jack)

Pin plug

or

Phone plug

To the recorder's recording
input terminal

To the recorder's recording
input terminal

To 1 or 2

Recording/Headphone output terminals

TS-771 Chairman unit or
TS-772 Delegate unit

Mini plug

To the recorder's recording
input terminal

19

10. INSTALLATION AND CONNECTION

10.1. Connection Example

TS-770 Central unit

TS-770 Central unit

TS-771 Chairman unit

TS-771 Chairman unit

Telephone handset

TS-772 Delegate units

TS-775 Remote Delegate
Interface unit

TS-772 Delegate unit

Handset modular
connector

Telephone body

PABX
C/O

TS-770 Central unit

TS-771 Chairman unit

PC

TS-775 Remote Delegate
Interface unit

TS-772 Delegate unit

Internet

PC

20

10.2. Installation Procedures

1. Connect the Delegate units to the Central unit (see page 9).

2. Perform function settings for the Central unit, and volume adjustment, etc. for
the Chairman and Delegate units

(see page 21).

4. Make connections between Central units (see page 25).

3. Repeat Steps 1 and 2 above for each Central unit (see page 25).

5. Establish speech connections with remote participants through PCs or
telephones, then adjust their sound volume

(see page 26).

Basic System Installation

If using multiple Central units:

If using the Remote Delegate Interface
units (remote conferencing):

(1 Central unit and up to 70 Delegate units)

(Up to 3 Central Units and up to 210 conference units)

21

10.3. Basic System Installation and Adjustment

This section explains how to install and adjust a basic system comprised of 1 Central Unit and Chairman and
Delegate units.

10.3.1. Connecting the Chairman and Delegate units to the Central unit

Step 1. Connect either the TS-773 or TS-774 Microphone to the TS-771 Chairman unit and TS-772 Delegate

unit.

Step 2. Connect the TS-771 Chairman unit and TS-772 Delegate unit to the TS-770 Central unit.

When installing, keep conference units 1.5 – 2 m away from each other. If distances exceed 2 m, use
YR-770-2M (2 m) or YR-770-10M (10 m) extension cables.
Up to 35 conference units can be connected per line (line 1 and 2) of the central unit.
Ensure that the total length of connection cables between the Central unit and the last conference unit
is less than 100 m.

Indicator

TS-773 or TS-774
Microphone

TS-771 Chairman unit or
TS-772 Delegate unit

TS-771 or TS-772 (Up to 35 units* per line)

Position the units

1.5 – 2 m away
from each other.

Line connection terminal

Line connection terminal

Line connection terminals

TS-770

YR-770-2M

YR-770-10M

100 m or less

* If the TS-775 Remote Delegate Interface unit is used, up to 35 units can be connected per line, including the TS-775.

22

Step 3. Connect an indicator or other device to the TS-771 Chairman unit's or TS-772 Delegate unit's Control

Output terminal as required.

Note

This output terminal is closed
("make" contact) when the
Remote Delegate Interface unit
is set to Speech mode.

Step 4. Set the Test switch on the front panel of the Central unit to ON. (Test mode)

The Test indicator lights together with the conference unit's Microphone in-use indicator and the
indicator on the microphone.
Note that as the number of connected conference units increases, several seconds may elapse
before the indicators light.
When all indicators for the installed conference units light, this completes connection confirmation. In
this event, if the indicators of a certain conference unit do not light, check the connections of the
microphone and those between the Central unit and conference units.

Step 5. Shift the Central unit's Test switch back to the OFF position. (Test mode cancelled.)

Note that as the number of connected conference units increases, several seconds may elapse
before the indicators extinguish.

TS-771/772

Tighten

Control output
terminal

Terminal screw

Cable*

* Conductor diameter:
ø0.4 – 1.3 mm (AWG 16 – 26),
solid or stranded

Indicator: Lights

TS-770 Central unit

Microphone in-use indicator: Lights

CENTRAL UNIT TS-770

Test switch: ON

Test indicator: Lights

TS-771 Chairman unit or TS-772 Delegate unit

23

Step 7. Adjust the sound volume of the Chairman and Delegate units.

Press the Talk key on both the Delegate unit in the number set in Step 4 and the Chairman unit to
turn on their microphone. Speaking into the microphone, adjust the volume to an appropriate level
using the Central unit's Line Volume control.

Step 8. Confirm that no acoustic feedback is generated from any microphone to be used.

If acoustic feedback occurs, widen the distance between conference units or turn down the line
volume in order to prevent feedback.
Use an equalizer to ensure that no acoustic feedback is caused even if the sound volume is
increased. Connect the equalizer's input terminal to the Central unit's Equalizer Insertion Output
terminal and the equalizer's output terminal to the Central unit's Equalizer Insertion Input terminal,
then set the Central unit's Equalizer Insertion switch to ON. This allows all audio signals to be
controlled by the equalizer.

10.3.2. Setting functions and adjusting Chairman and Delegate units sound output volume

Step 6. Set the number of simultaneously operable Delegate units using the Speaker Restriction switch on

the front panel of the Central unit.
For details, refer to p. 16.

TS-770 Central unit

CENTRAL UNIT TS-770

Speaker restriction switch
(Factory preset: 6)

Line volume control

TS-770

CENTRAL UNIT TS-770

Indicator: Lights

Indicator: Extinguishes

Indicator: Lights

TS-771 or TS-772

TS-770

Equalizer insertion switch

Equalizer

OutIn

24

Step 9. Set the Automatic Mic-Off function*, as required, using the Automatic Mic-Off setting switch on the

front panel of the Central unit.

* This function automatically turns off the microphone if not used for a specified period of time (see

page 17).

Step 10. When using a wired microphone and background music (BGM) equipment, connect these

components to the Central unit and adjust their sound volume.
In the case of a wired microphone, connect it to the Central unit's front-mounted Mic Input jack and
adjust the volume to an appropriate level using the microphone volume control.
In the case of BGM equipment such as CD decks and cassette decks, connect to the Central unit's
front-mounted AUX Input jack and adjust the volume to an appropriate level using AUX input volume
control.

Step 11. When recording conference contents, connect the recording equipment's recording input terminal to

the Central unit's Recording Output terminal, or the chairman or Delegate unit's
Recording/Headphone output terminals.
For details, refer to p. 18.

Microphone volume control

AUX volume control

TS-770

9

CENTRAL UNIT TS-770

To a BGM player

To a wired microphone

10

Automatic mic-off setting switch
(Factory preset: OFF)

TS-770

To recording equipment

25

11. IF USING MULTIPLE CENTRAL UNITS:

Up to 3 Central Units (up to 210 conference units) can be simultaneously used.

Note

The Speaker Restriction and Automatic Mic-Off functions will not be applied correctly if settings are performed
differently for each Central unit.

Step 1. Perform connections and adjustments for each Central unit.

Follow Steps 1 – 11 on pages 21 – 24 for each Central unit.

Step 2. Set the Central unit's rear-mounted Expansion switch.

Set the Expansion switch of one of the connected Central units to MAIN, and the remaining Central
units to EXPANSION.
To shift the switch position, loosen the lock screw for the Expansion switch and retighten the screw
after the position change has been completed.

Step 3. Make connections between Central units.

Connect the Expansion IN-OUT terminals mutually between Central units, as shown below. Note that
the CTRL terminal of the Main Central unit must be connected directly to each CTRL terminal of the
Expansion Central unit(s) using a single line.

Note

Because no cables are supplied for connection between Central units, please prepare separately.

TS-770 Central unit

Lock screw Lock screw

Expansion switch

When set to MAIN
(Factory preset)

When set to EXPANSION

TS-770
(For the MAIN setting)

(For the MAIN setting)

Expansion IN/OUT terminals

TS-770
(For the EXPANSION setting)

(For the EXPANSION setting)

Expansion IN/OUT terminals

TS-770
(For the EXPANSION setting)

(For the EXPANSION setting)

Expansion IN/OUT terminals

26

Step 4. Set the Central unit's functions as follows:

• Speaker Restriction Switch
Only set the Speaker Restriction switch of the MAIN Central unit. (This setting takes effect
regardless of the switch settings of the other EXPANSION Central Units.)

• Automatic Mic-Off Setting Switch
Perform the same setting for all connected Central units.

12. WHEN HOLDING REMOTE CONFERENCES:

When holding a conference between remote locations, add the Remote Delegate Interface unit and use a
telephone or PC.

Step 1. Connect the Remote Delegate Interface unit to the Central unit. Connections are the same as those

used for other conference units (see page 21).

Step 2. Connect an indicator or other device to the Remote Delegate Interface unit's Control Output terminal

as required.

Note

This output terminal is closed ("make"
contact) when the Remote Delegate
Interface is set to Speech mode.

TS-771 or TS-772

TS-770

TS-775

Line connection terminal

TS-771 or TS-772

Line connection terminal

Position the units 1.5 – 2 m
away from each other.

100 m or less

Note

A total of up to 35 Chairman, Delegate and Remote Delegate Interface units can be connected per Central unit
line connection terminal.

Line connection terminals

YR-770-2M

TS-775

YR-770-10M

TS-775

Tighten

Control output terminal

Terminal screw

Cable*

* Conductor diameter:
ø0.4 – 1.3 mm (AWG 16 – 26),
solid or stranded

27

Step 3. Set the telephones or PCs in both the conference room and remote location to conversation mode

and connect the conference room telephone or PC to the Remote Delegate Interface unit.

3-1. If using the telephone:

Use a telephone equipped with a handset using modular connectors.

1) Set the telephones in both the conference room and the remote location to conversation mode.

2) Detach the modular plug from the handset, then connect the plug to the Remote Delegate Interface

unit.

3-2. If using the PC's microphone input and headphone output:

1) Using Skype* or other IP telephone software, set the PCs in both the conference room and the

remote location to conversation mode.

2) Set the PC's microphone input and speaker output to allow conversations to be held between PCs

at an appropriate level.

3) Connect the PC's headphone output terminal to the Remote Delegate Interface unit's Microphone

Input terminal, and the Remote Delegate Interface unit's Speaker Output terminal to the PC's
microphone input terminal.

* Skype is a trademark of Skype Limited.

Skype is a toll-free IP telephone software program which allows conversations via the Internet.
For details, refer to http://www.skype.com/helloagain.html.

TS-775 Remote delegate interface unit

Telephone body

[Remote location]

Telephone handset

[Conference room]

Modular jack

Handset modular connector

PABX
C/O

[Remote location]

Headset

PC

[Conference room]

Microphone input terminal

PC

Internet

TS-775

Speaker output terminal

Headphone
output terminal

Microphone input terminal

28

Step 4. Set the Central unit's Automatic Mic-Off setting switch to the OFF position.

Step 5. Set the Remote Delegate Interface unit's Auto/Manual Selector switch to the MANUAL position to

disable speech through the unit (the speech indicator extinguishes).

Step 6. Adjust the Speaker Output Volume control to enable the remote party to hear audio from the

Chairman and Delegate units clearly at their telephones or PCs.

Note

When using a telephone, if sound is not audible at all, change the position of the Handset Selector
switch (default position: A).

Step 7. Press the Talk key to enable the remote party to speak, then adjust the Microphone Input Volume

control so that the remote party's voice can be heard clearly from the Chairman and Delegate units
(the microphone indicator extinguishes).

Step 8. Set the Auto/Manual Selector switch to the AUTO position and perform fine adjustment of the

Microphone Input Volume control to allow conversation flows to be reversed correctly between the
conference room and the remote party.

TS-770 Central unit

CENTRAL UNIT TS-770

Automatic mic-off setting switch
(Factory preset: OFF)

TS-775 Remote delegate interface unit

Speaker Output Volume ControlHandset Selector Switch

Microphone Input Volume Control

Speech Indicator

Talk Key

Auto/Manual Selector Switch

29

13. BLOCK DIAGRAMS

13.1. TS-770 Central Unit

13.2. TS-771 Chairman Unit

EXT IN 1

EQUALIZER

IN

OUT

REC OUT

MIC

AUX

Fuse

AUX

MIC

EXT IN 2

-

EQ switch

EXT OUT 1

EXT OUT 2

LINE

Chime

REC OUT

Number of speakers

Priority control

EXT CTRL 1

+35 V

DIN

LINE 1
LINE 2

EXT CTRL 2

+24 V+35 V

+

REG

+

Power indicator

Speech duration Test control

Test/Microphone indicator

CONTROL OUT

Bias

Microphone

TS-773

or

TS-774

+35 V

LED control

Microphone control

Speaker control

Priority key Talk key

DC control

Test control

Speech duration control

VR

REC/PHONE 1

REC/PHONE 2

DIN

DC control

Priority control

30

13.3. TS-772 Delegate Unit

13.4. TS-775 Remote Delegate Interface Unit

CONTROL OUT

Bias

Microphone

TS-773

or

TS-774

+35 V

LED control

Microphone control

Speaker control

Talk key

Speech duration control

OUTPUT VR

To PC's
microphone input

OUTPUT

DC control

Test control

VR

REC/PHONE 1

REC/PHONE 2

DIN

DC control

Number of speakers

From PC's

INPUT

headphone output

MODULAR

To telephone's handset modular connector

+35 V

INPUT VR

LED control

Signal detection

Signal detection

Microphone control

Speaker control

Talk key

CONTROL OUT

DC control

Test control

Speech duration control

DIN

DC control

Priority control

31

14. SPECIFICATIONS

* 0 dB = 1 V

Note: The design and specifications are subject to change without notice for improvement.

• Accessories

Power cord (2 m) ........................................ 1

14.1. TS-770 Central Unit

Power Source AC mains, 50/60 Hz
Power Consumption 60 W
Input Microphone: –60 dB*, 600 Ω, unbalanced, phone jack

AUX: –20 dB*, 600 Ω, unbalanced, phone jack
Output Recording: –20 dB*, 10 kΩ, unbalanced, phone jack, RCA jack x 2
Equalizer Insertion Input: –20 dB*, 10 kΩ, RCA jack
Terminals Output: –20 dB*, 10 kΩ, RCA jack
Expansion IN/OUT Input: –20 dB*, 10 kΩ, unbalanced, RCA jack x 2
Terminals Output: –20 dB*, 10 kΩ, unbalanced, RCA jack x 2

Control: 10 kΩ, voltage output, RCA jack x 2
Control Priority Speech chime: A single-tone chime activated by TS-771's priority key

Speaker Restriction: Number of simultaneously-usable TS-772/775s can

be set to 0, 1, 3, or 6

Automatic Mic-off: Function OFF/20 s/40 s (selectable)
Number of Connectable 70 units (max. 35 units per line), max. 210 units when 3 Central units
Conference Units connected
Operating Temperature 0°C to 40°C (32°F to 104°F)
Operating Humidity Under 90 % RH (no condensation)
Finish Pre-coated steel plate, black (30% glossy)
Dimensions 210 (w) x 107.1 (h) x 316 (d) mm (8.27" x 4.22" x 12.44")
Weight 4 kg (8.82 lb)

14.2. TS-771 Chairman Unit and TS-772 Delegate Unit

Power Source 35 V DC, under 30 mA (supplied from TS-770 Central unit)
Output Headphone/Recording: 32 Ω (headphone)/10 kΩ, –20 dB* (recording),

unbalanced, mini jack, equipped with a volume
control

Internal Speaker: 130 Ω, 200 mW

Contact output: 24 V DC, Max. 50 mA
Control Speech: Microphone and speaker on-off control by Talk key

Priority speech (TS-771 only):

Microphone and speaker on-off control, other microphone off, and

single-tone chime activation by Priority key
Operating Temperature 0°C to 40°C (32°F to 104°F)
Operating Humidity Under 90 % RH (no condensation)
Finish Case: ABS resin, black

Panel: ABS resin, gray metallic, 50 % glossy, paint
Dimensions 114.5 (w) x 78.4 (h) x 152.9 (d) mm (4.51" x 3.09" x 6.02")
Weight 560 g (1.23 lb)

* 0 dB = 1 V

Note: The design and specifications are subject to change without notice for improvement.

TS-773 TS-774

Electret condenser microphone

Unidirectional

1.8 kΩ

–37 dB (1 kHz, 0 dB = 1 v/Pa)

Speech Indicator (ring type)

100 – 13,000 Hz

Equivalent to XLR-4-32

Gooseneck: Stainless steel, black
Other: ABS resin, black

368 mm (14.49") 518 mm (20.39")

90 g (3.17 oz) 105 g (3.7 oz)

TS-771 Chairman unit, TS-772 Delegate unit

Model No.
Type
Directivity
Rated Impedance
Rated Sensitivity
LED Indicator
Frequency Response
Output Connector
Finish

Length
Weight
Applicable Unit (Option)

133-02-00102-00

URL: http://www.toa.jp/

14.3. TS-773 and TS-774 Microphones

Note: The design and specifications are subject to change without notice for improvement.

14.4. TS-775 Remote Delegate Interface Unit

Power Source 35 V DC, under 30 mA (supplied from TS-770 Central unit)
Input –50 dB*, 200 Ω, balanced, mini jack, equipped with a volume control
Output –40 dB*, 22 Ω, balanced, mini jack, equipped with a volume control
Speech Mode Auto: Voice-activated Automatic switching

Manual: Talk key on-off switching
Operating Temperature 0°C to 40°C (32°F to 104°F)
Operating Humidity Under 90 % RH (no condensation)
Finish Pre-coated steel plate, black
Dimensions 160 (w) x 41.8 (h) x 100 (d) mm (6.3" x 1.65" x 3.94") (excluding projection)
Weight 700 g (1.54 lb)

* 0 dB = 1 V

Note: The design and specifications are subject to change without notice for improvement.

YR-770-2M YR-770-10M

DIN socket (8P, unit's rear-mounted connector side),
DIN plug (8P, unit's cord connector side)

2 m (78.74") 10 m (393.7")

Model No.
Connector

Length

14.5. YR-770-2M 2 m Extension Cord and YR-770-10M 10 m Extension Cord

Note: The design and specifications are subject to change without notice for improvement.