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BeFREE 10
10.4” Touchcomputer with InterCom
TECHNICAL OVERVIEW
Description and Application
BeFREE10_TO_1_4.doc
Version 1.4
December 8, 2017
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TABLE OF CONTENTS II
BeFREE 10 – TECHNICAL OVERVIEW
TABLE OF CONTENTS
A. GENERAL INFORMATION.......................................................................................A-1
A.1. Highlights.............................................................................................................. A-1
A.2. Technical Characteristics ......................................................................................A-2
B. INTEGRAL PARTS AND FUNCTIONALITY .......................................................... B-1
B.1. Operator Interface.................................................................................................. B-1
B.2. Touchmonitor ........................................................................................................ B-3
B.3. Embedded Computer............................................................................................. B-3
B.4. Intercom (Audio Section) ...................................................................................... B-4
B.4.1. Microphone Amplifier ................................................................................... B-5
B.4.2. Hands-Free Amplifier.................................................................................... B-5
B.4.3. Alarm/Alert Amplifier ................................................................................... B-5
B.4.4. Central Speaker Amplifier............................................................................. B-5
B.4.5. Bar-Graph Display......................................................................................... B-6
B.4.6. Incremental Encoder...................................................................................... B-6
B.5. External Connectors ..............................................................................................B-7
B.5.1. External Digital Inputs................................................................................... B-7
C. OPERATION ................................................................................................................C-1
C.1. Configuring BeFREE 10 .......................................................................................C-1
C.2. Applying BeFREE 10............................................................................................C-1
D. OPTIONS...................................................................................................................... D-1
D.1. Inclination Mechanism..........................................................................................D-1
D.2. HID Telephony Interface ......................................................................................D-1
D.3. Echo-Cancellation Circuitry.................................................................................. D-2
D.4. Goose-Neck Microphone ......................................................................................D-2
E. ORDERING CODES .................................................................................................... E-1
E.1. BeFREE 10 ............................................................................................................ E-1
E.2. Inclination Mechanism .......................................................................................... E-2
F. REFERENCES ...............................................................................................................F-1
G. NOTICES...................................................................................................................... G-1
G.1. Disclaimer .............................................................................................................G-1
G.2. Copyright Notice................................................................................................... G-1
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A. GENERAL INFORMATION A-1
BeFREE 10 – TECHNICAL OVERVIEW
A. GENERAL INFORMATION
The BeFREE 10 (BF 10) is a member of the modular FREE (also referred to as
FREE/FREE+/BeFREE) product family, integrating a 10.4” touchmonitor, a computer and
an intercom device. It is compatible and combinable with all existing FREE modules. The
touchmonitor comprises a high resolution (XGA), ultra-wide viewing angle TFT LCD and
5-wire resistive touchscreen. The computer is based on a main-board with Intel quad-core
Celeron processor (J1900) and a solid state disk. Thanks to low-power components and the
corresponding electronic and thermal design the BeFREE 10 is completely silent and
without moving parts.
The Intercom section consists of a goose-neck microphone, illuminated PTT key, stereo
loudspeakers, volume control knob and VU-meter. Its primary audio interface is USB, but
it is also connected to the analogue sound card of the embedded computer. This dual
interface results in up to four listening (output) channels and two parallel recording (input)
channels. Status of the PTT key is reported via HID Keyboard and/or HID Telephony
interface.
A.1. Highlights
FEATURES
♦ space-saving integration of a fanless touchcomputer and an intercom (functionally
equivalent to the combination of BeFREE 15 and Speakerbox module)
♦ modular – combinable with other FREE modules into multifunctional terminals
♦ low-profile horizontal design
♦ silent and reliable - no moving parts, industrial grade components, Ethernet
redundancy, redundant internal audio and controller interfaces
♦ extensive connectivity (LAN, USB, COM, external display, digital inputs)
♦ cable management – hidden and secured, but accessible
♦ built-in Tipro controller enables:
modularity and programmability
energy saving modes
touchscreen disable/enable control
brightness adjustment
five programmable keys
two programmable digital inputs (e.g. for an external PTT switch /pedal)
♦ stereo loudspeakers (2 x 2W) with volume control encoder
♦ additional low-frequency loudspeaker (1 x 1W) with programmable equalizer
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A. GENERAL INFORMATION A-2
BeFREE 10 – TECHNICAL OVERVIEW
♦ total 5 W output power generates sound pressure level (SPL) of approximately 92 dB
at 1.0 m distance, what is approximately 23 times louder than average conversation
♦ goose-neck microphone with illuminated PTT key
♦ three-colour bar-graph display
♦ three mechanical keys for brightness control and other functions
♦ mechanical key-switch inside the encoder for bar-graph control
♦ several LED indicators (power, SSD, microphone, speakers, touchscreen ...)
♦ optional Inclination Mechanism (VESA 75)
APPLICATIONS
♦ operator /dispatcher terminals/consoles for command and control centres in:
transport and traffic control (railways, air traffic …)
public safety (police, fire brigades, ambulance …)
utilities (electricity, gas ...)
building/facility management systems (airports, banks, industrial plants …)
♦ trading and banking consoles
♦ multifunctional control panels
A.2. Technical Characteristics
ELECTRICAL
♦ power supply: 12 V ± 5% (from an external AC/DC adapter)
♦ power consumption:
Operating Mode Typical Maximal
OFF (power saving) 0.2W TBD
SLEEP (Windows standby) 3.0W TBD
IDLE 16.5W TBD
ACTIVE 21.0W 32.0W
Note 1: Values in the table above are temporary approximations of typical consumption, obtained
by measurements at the 12 V power input of the BeFREE 10 (LCD at full brightness) without any
additional Tipro modules and without any other peripherals connected. Terminology for Operating
Modes is taken from “ENERGY STAR Program Requirements for Computers: Version 5.0”.
♦ internal interface and power connectors (to provide for modularity):
left-hand side Tipro Bus connector: 6-pin Micro-MaTch header (male) at the
end of a 6-wire ribbon cable
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A. GENERAL INFORMATION A-3
BeFREE 10 – TECHNICAL OVERVIEW
right-hand side Tipro Bus connector: 6-pin Micro-MaTch header (male) at the
end of a 6-wire ribbon cable
♦ external interface and power connectors (to provide for external expansions):
standard computer interfaces: LAN, USB, COM, VGA … (see Chapter B.5 for
details)
MECHANICAL
♦ casing: plastic ABS, black (C15) colour with matte black (C25) top part
♦ gross dimensions (with side-covers): 332 x 278 x100 (W x D x H ) [mm]
♦ goose-neck microphone length/height: 350± 50mm
♦ weight: 3.9 kg (approximately)
♦ protection (sealing) grade: IP 20 (according to EN 60529)
Figure A.1 Physical Dimensions
ENVIRONMENTAL
♦ operating ambient temperature range: +5°C to +35°C
♦ storage ambient temperature range: -10°C to 50oC
♦ relative humidity range: 20% to 80% (non-condensing)
EMBEDDED COMPUTER
♦ Processor (SoC)
Intel Celeron J1900 2.0 GHz (2.42 GHz burst frequency)
♦ Chipset
Northbridge functionality integrated in the SoC
Southbridge functionality integrated in the SoC
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A. GENERAL INFORMATION A-4
BeFREE 10 – TECHNICAL OVERVIEW
♦ System Memory
4GB DDR3L - 1333
♦ Video
graphic processor integrated in the SoC
dual independent display support
resolution: up to 2560x1600
♦ Dual Ethernet:
2 x Intel I211, 10/100/1000 Base-TX
♦ Audio
Analogue Line In and Line Out (internally connected to Intercom)
♦ Mass Storage
type: Solid State Disk
technology: Multi-Level Cell (MLC) NAND
interface: SATA II - 3 Gb/s
form factor: 2.5”
capacity: ≥ 120 GB
DISPLAY
♦ type: TFT LCD
♦ size: 10.4” diagonal
♦ aspect ratio: 4:3
♦ native resolution: 1024 × 768 (XGA)
♦ luminance / brightness (typical): ≥ 350 cd/m2
♦ contrast ratio (typical): ≥ 500 :1
♦ backlight lifetime (typical): ≥ 35,000 hours
TOUCHSCREEN
♦ technology: 5-wire resistive (ELO)
♦ positional accuracy: 2.03 mm (standard deviation of error)
♦ positional accuracy: ±4.572 mm (maximum error)
♦ touch activation force: < 113g (typically)
♦ controller resolution: 4096 x 4096 touch points
♦ light transmission: 80 ± 5 % (at 550 nm wavelength)
♦ lifetime: 35 x 106 touches in one location
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A. GENERAL INFORMATION A-5
BeFREE 10 – TECHNICAL OVERVIEW
AUDIO SECTION (INTERCOM)
♦ Loudspeakers (Left / Voice and Right / Alert)
two in parallel within the left output
two in parallel within the right output
type: dynamic
rated power: 3 W
output sound pressure level (SPL): 78 dB ± 3 dB @ 1W @ 1 kHz @ 1.0m distance
♦ Loudspeaker (Central)
type: dynamic
rated power: 3 W
output sound pressure level (SPL): 79 dB ± 3 dB @ 1W @ 1 kHz @ 1.0m distance
♦ Goose-neck Microphone
type: electret condenser, unidirectional
max input: 120 dB SPL
♦ Analogue Amplifiers
designed to meet wide-band IP telephony standards
frequency pass-band: (100 Hz - 8 kHz)
TYP
output power: 5 x 1 W (2 x 2 x 1W + 1 x 1 W)
♦ USB Audio Codec
model: Texas Instruments PCM 2902C
USB Interface: full-speed, USB 2.0 compliant, certified by USB-IF
resolution: 16-bit Delta-Sigma ADC and DAC
sampling rates (ADC): 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
sampling rates (DAC): 32, 44.1, 48 kHz
recommended data format: 16-bit (rather than 8-bit), stereo (rather than mono)
MECHANICAL KEYS
♦ Push To Talk Key (two key-switches in parallel)
model: Cherry MX
key travel: 3.6mm to 4.0mm total, (2 ± 0.6) mm pretravel
actuating force: (60 ± 20) cN
reliability (Mean Cycles To Failure): MCTF = 1 billion (109) press/release cycles
(50 million is guaranteed minimum)
♦ Control Keys
model: Diptronic DTS
key travel (typical): 0.3mm
actuating force (typical): 255 cN
lifetime (minimal): 0.5 million operations
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B. INTEGRAL PARTS AND FUNCTIONALITY B-1
BeFREE 10 – TECHNICAL OVERVIEW
B. INTEGRAL PARTS AND FUNCTIONALITY
BeFREE 10 represents an integration of a touchmonitor (display with touchscreen), a
computer, an intercom and a controller.
Figure B.1 Operator Interface of BeFREE10
B.1. Operator Interface
The Stripe (see Figure B.2 below) is an ergonomically designed vertical area along the
right-hand side of the display. It comprises a number of visual indicators and mechanical
keys (short-travel) to provide the operator with a quick insight and immediate access to
important controls. The most prominent position is assigned to the PTT key, which
consists of two long-travel mechanical key-switches and a large actuator with dimmable
background illumination.
Central Speaker
Voice
Speaker
Microphone
Encoder
with Switch
PTT Key
Bar-Graph Display
LED Indicators
Control Keys
Touchscreen
Display
ON/OFF Key
Alert Speaker
Microphone LED
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B. INTEGRAL PARTS AND FUNCTIONALITY B-2
BeFREE 10 – TECHNICAL OVERVIEW
Microphone LED Illuminated (red) while the microphone is active.
Speaker Indicator Indicates speaker being adjusted
Brightness UP Key Press to increase brightness of the display and all
visual indicators.
Brightness DOWN
Key
Press to decrease brightness of the display and all
visual indicators.
Home / TouchDisable
Key
Long press disables touchscreen. The LED
indicator (lock) is illuminated (red) while touch is
disabled. Short press (re)enables touchscreen.
Status Indicators Power, Disk Activity and Warning. See Figure B.3
for more details.
Bar-Graph Display Green: loudspeakers volume level
Red: VU-meter (actual signal level at the
loudspeakers and the microphone)
Orange: display brightness level
PTT (Push To Talk)
Key
By default PTT, but can be set to PTM (Push To
Mute) or any other key event.
Blue backlight can be programmed to blink or turn
ON/OFF upon press/release.
Figure B.2 The Stripe (Keys & Indicators)
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B. INTEGRAL PARTS AND FUNCTIONALITY B-3
BeFREE 10 – TECHNICAL OVERVIEW
Speakers Blue Indicates if volume setting is applied to left,
right or both speakers
Touchscreen Red Illuminated when touchscreen is disabled
Power Blue Short blink: OFF (power saving mode)
Long blink: SLEEP (standby)
Continuous: ACTIVE (operating)
Disk Blue Blinking indicates read/write activity of
SSD
Warning Red Illuminated when an error has been
detected
Figure B.3 LED Indicators
B.2. Touchmonitor
The touchmonitor comprises a high-brightness, ultra-wide viewing angle TFT LCD and
a touchscreen. The display is connected to the embedded computer via LVDS interface.
The touchscreen is operated by the respective controller with USB interface to the
embedded computer.
Brightness of the LCD and all visual indicators on the Stripe (Bar-Graph Display, LED
Indicators and PTT Key backlight) is adjustable by Brightness UP and DOWN keys.
Home / TouchDisable key can be used to temporarily disable touchscreen for cleaning
purposes.
B.3. Embedded Computer
BeFREE 10 incorporates an industrial grade single-board computer, which operates the
embedded touchmonitor and provides for an extensive connectivity to enable various
external peripherals to be used along (see Chapter B.5 for more details). It is internally
connected to the Tipro Controller (via USB and COM 4) as well as with the Audio
Section / Subsystem (via USB and Analogue Line-In / Line-Out signals).
The computer is based on Intel’s integrated circuits, what enables a wide-range of
operating systems to be applied. A solid state disk is used as a mass storage device. The
heat generated by integrated circuits is transferred via a heat-pipe to an internal heat-sink,
without a fan. As a result the BeFREE 10 is completely silent in operation, without moving
parts.
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B. INTEGRAL PARTS AND FUNCTIONALITY B-4
BeFREE 10 – TECHNICAL OVERVIEW
B.4. Intercom (Audio Section)
The functional block diagram of the audio section is shown in Figure B.4 below. Left
(Voice) and Right (Alert) Speaker are physically/electrically realized as two loudspeakers
in parallel to double the output volume. The Central Speaker, along with associated
hardware equalizer, emphasizes lower frequencies in order to improve naturalness and
intelligibility of the reproduced speech.
Internal signal processing includes analogue-to-digital and digital-to-analogue
conversion (block “USB AUDIO CODEC”), conditioning (amplification, attenuation,
filtering …), sensing and switching. The complete processing is programmable via
ChangeMe software and can be dynamically modified during the operation in so-called
On-Line operating mode (using HID API). USB and analogue signals can be mixed,
resulting in up to four listening / output audio channels (2 x stereo signal) and two parallel
recording / input channels (USB and analogue). The Echo-Cancellation circuitry is optional
(see Chapter D.3 for more details).
Figure B.4 Audio Section (Intercom)
L
R
ANALOGUE
AUDIO
L
R
AMPLIFIER
USB AUDIO
L&R
LINE OUT:
LINE IN:
L
L&R
LINE OUT:
LINE IN:
∑
M
AMPLIFIER
∑
MICROPHONE
AMPLIFIER
USB
AUDIO
CODEC
∑
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B. INTEGRAL PARTS AND FUNCTIONALITY B-5
BeFREE 10 – TECHNICAL OVERVIEW
B.4.1. Microphone Amplifier
This is a logarithmic audio amplifier with programmable gain, noise gating threshold
and compression ratio. Noise gating feature enables ambient noise to be suppressed. All
sounds below the threshold are removed inside the amplifier, so with higher threshold the
microphone needs to be used closer to the mouth and speech needs to be louder to get
through the amplifier. The compression feature enables compression of the output signal
dynamics in order to minimize the difference between soft/low and loud speech. The
amplifier is also capable of limiting extremely loud speech thus preventing distortion and
popping. The overall gain can be even lower than one (i.e. attenuation) as well as equal to
zero (i.e. totally muted input). Also the range of the goose-neck microphone can be
adjusted.
A linear regime of the amplifier is a special option which might be activated in full-
duplex operation where acoustic echo is to be cancelled using application software (rather
than optionally integrated hardware echo-canceller – see Chapter D.3).
B.4.2. Hands-Free Amplifier
This is a linear audio power amplifier with programmable gain that drives the Voice
(Left) Speaker. The gain of this amplifier (i.e. volume of the Voice Speaker) can be
adjusted by the user in normal operation via the incremental encoder (i.e. endless digital
potentiometer) at the rear right-hand side of the module. The selected level is immediately
displayed at the bar-graph display in green colour (20 volume levels + mute). The
amplifier can deliver up to 2 W (2 x 1 W) of electric power to the Voice Speaker.
B.4.3. Alarm/Alert Amplifier
This is a linear audio power amplifier with programmable gain that drives the Alert
(Right) Speaker. The gain of this amplifier is normally equal to the gain of the Hands-Free
amplifier, but it can also have a separate response characteristic to the position of the
incremental encoder. This way, for instance, the Alert Speaker can be held at a constant
volume level while increasing/decreasing volume level at the Voice Speaker. The amplifier
is capable of delivering up to 2 W (2 x 1 W) of electric power to the Alert Speaker.
It is also possible to obtain completely independent volume adjustments of the Alert
Speaker (see Chapter B.4.6).
B.4.4. Central Speaker Amplifier
This is a linear audio power amplifier with programmable gain and cut-off frequency,
so it effectively acts as a programmable low-pass filter (which is a kind of an equalizer)
capable to boost lower frequencies (typically below 300 Hz) and improve naturalness of
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B. INTEGRAL PARTS AND FUNCTIONALITY B-6
BeFREE 10 – TECHNICAL OVERVIEW
the reproduced speech. It drives the Central Speaker by the “equalized” sum of signals to
the Voice and to the Alert Speaker. The amplifier can deliver up to 1 W of electric power
to the Central Speaker.
B.4.5. Bar-Graph Display
It comprises 10 three-colour (red, green and orange) LEDs. By default it constantly
operates as VU meter in red colour, showing actual level of the left output signal and the
level of the microphone signal. Optionally, the microphone signal can be disconnected
from the VU meter. It is also possible to add the right output signal, so the VU meter
displays the sum of left and right outputs.
If a rotation of the incremental encoder has been detected it automatically displays the
gain of the Hands-Free Amplifier in green colour.
If a press of brightness UP or DOWN key has been detected it automatically displays
the current brightness setting of the LCD and all visual indicators in orange colour.
B.4.6. Incremental Encoder
This is an endless digital potentiometer used for immediate volume control of the Voice
and Alert Speakers. It has 24 detents per revolution. Every single detent changes the
volume for one step up or down, but only every second one is represented by one LED in
the Bar-Graph display in green colour. The encoder incorporates a push-switch/ key which
enables navigation through different bar-graph modes: Volume, Brightness and VU meter.
In the Volume mode both Speaker Indicators on the Stripe are illuminated.
Optionally, the encoder enables independent volume control for each of the speakers. In
this mode its internal push-switch is utilized to toggle the speaker to be adjusted. Currently
adjustable speaker is indicated on the Stripe by the respective Speaker Indicator.
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B. INTEGRAL PARTS AND FUNCTIONALITY B-7
BeFREE 10 – TECHNICAL OVERVIEW
B.5. External Connectors
Numerous connections for external devices are available at the Connector Plate (see
Figure B.5) from underneath the module. Most of them are standard interfaces (USB,
LAN, COM, VGA …) intended for users to apply freely.
# Designator Type Note
1 12V Input Mini Power DIN reserved
2 Digital Input RJ 4P/4C socket see Chapter B.5.1
3 Dual USB 2 × USB type – A full-speed, 500 mA
4 Dual USB 2 × USB type – A full-speed, 500 mA
5 Dual USB 2 × USB type – A high-speed, 500 mA
6 LAN 1 RJ 8P/8C (RJ 45) 1 Gb Ethernet
7 LAN 2 RJ 8P/8C (RJ 45) 1 Gb Ethernet
8 COM 1 DSUB-9 male RS232 serial port
9 VGA DSUB-15 female analogue RGB output
Figure B.5 Connector Plate
B.5.1. External Digital Inputs
Two inputs (refer to Figure B.6 for the connector and signal description) are provided
for detection of external digital (ON/OFF) signals to be transformed into programmable
key events, equivalent to, for instance, PushToTalk key on the Stripe. Typical device to be
connected to is an external PushToTalk switch/pedal.
One of the inputs (A) is galvanically isolated (via opto-coupler) and is therefore
intended for an external ground-referenced signal, such as a digital output of another
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
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B. INTEGRAL PARTS AND FUNCTIONALITY B-8
BeFREE 10 – TECHNICAL OVERVIEW
electronic device. The other input (B) is to be used for an external “floating” signal, such
as contacts of a mechanical/magnetic key/switch (see Figure B.7).
Pin # Signal
1 A– (GND)
2 A+ (RxD)
3 B+ (TxD)
4 B– (GND)
Figure B.6 Digital Inputs Connector
Port Internal circuitry Suggested external circuitry
A
B
Figure B.7 Applying Digital Inputs
These inputs have an alternative function (direct access to the Tipro controller from an
external computer via serial RS232 port, as per Figure B.6) which is intended for
installation and maintenance purposes. More details can be found in the Chapter C.1 as
well as in the Reference [11].
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C. OPERATION C-1
BeFREE 10 – TECHNICAL OVERVIEW
C. OPERATION
C.1. Configuring BeFREE 10
The BeFREE 10 is a rather complex device with a number of programmable
settings/parameters provided for users to configure in accordance to the particular
application. To enable that feature Tipro supplies the respective programming utility
(ChangeMe) which operates only under Windows operating systems. It assists users to
define own set of parameters, save them into a file (for possible replication in the future)
and program into non-volatile memory of the Tipro controller for permanent storage.
It is also possible to dynamically modify certain settings (e.g. display brightness, LED
indicators, touchscreen disable/enable for cleaning purposes …) from the application
software. For that purpose Tipro provides the respective Windows API (HID API) and the
associated documentation.
BeFREE 10 can be programmed/configured externally, from another computer. That
computer needs to operate under Windows with ChangeMe utility installed and have one
serial COM port available. The BeFREE 10 may operate under any operating system or not
have it installed at all. This feature is obviously useful in cases when the BeFREE 10 runs a
non-Windows operating system, but it is also applicable in all Windows cases where
ChangeMe utility is not installed (e.g. to prevent uncontrolled modifications of the
settings). The cable required for programming can be ordered from Tipro (Ordering Code
TM-CGR) or rather easily made. The Reference [11] describes the procedure in detail.
C.2. Applying BeFREE 10
The BeFREE 10 is typically used together with other FREE add-on modules, combined
in various compositions/configurations. An example with Handset modules is shown in
Figure C.1 below.
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C. OPERATION C-2
BeFREE 10 – TECHNICAL OVERVIEW
Figure C.1 Example BeFREE 10 Configuration
Figure C.2 Example BeFREE 10 Configuration – Schematic Representation
USB
Root Hub
Generic
USB Hub
BeFREE
10
BF10
MainBoard
Tipro
USB
Controller
USB Audio
Device
Handset
TM-HTA
Tipro Bus
Module
Tipro Bus
USB Cable
USB Cable
Handset
TM-HTA
USB Audio
Device
Generic USB
Hub
Tipro Bus
Module
USB Audio
Device
Generic USB
Hub
Tipro Bus
Module
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D. OPTIONS D-1
BeFREE 10 – TECHNICAL OVERVIEW
D. OPTIONS
D.1. Inclination Mechanism
BeFREE 10 can be fitted with an Inclination Mechanism (also referred to as Angle
Adjustment Mechanism). Normally, the display surface of BeFREE 10 is inclined for 150
against the horizontal plane. The mechanism enables gradual adjustment of the angle from
approximately 300 to 700.
Figure D.1 BeFREE 10 with Inclination Mechanism (VESA 75)
D.2. HID Telephony Interface
Actual status (pressed/released) of the PTT key is normally reported as a programmable
sequence of keystrokes generated by a standard USB keyboard, this way emulating a
generic HID Keyboard Device. An example of the application can be found in the
Reference [9] (“Hook and PTT in Software”).
Additionally or alternatively, the PTT status can be reported via HID Telephony
Interface, which is an integral part of the BeFREE 10. See reference [10] (“HID Telephony
Interface”) for more details.
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D. OPTIONS D-2
BeFREE 10 – TECHNICAL OVERVIEW
D.3. Echo-Cancellation Circuitry
Acoustic echo is a physical phenomenon inherent to hands-free devices (such as
Intercom) in full-duplex mode, so it needs to be suppressed and/or cancelled. This is
normally implemented in the application software through the specific signal processing
routines. Alternatively, it can be achieved in the hardware using a digital signal processor.
Basic properties of the optional (see Chapter E.1 for details on the respective Ordering
Code) Echo-Cancellation circuitry are listed below.
♦ performance: full-duplex
♦ sampling rate: 16 kHz
♦ acoustic echo-cancellation: ≥ 40 dB
♦ latency: ≤ 10 ms
Reference signal for the canceller is taken from the Voice Speaker. Optionally, the
reference can be signal at the Alert Speaker as well as the sum of signals at both speakers.
D.4. Goose-Neck Microphone
By default, the goose-neck microphone is an integral part of the BeFREE 10, but it can
be optionally omitted. See Chapter E.1 for details on the respective Ordering Code.
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E. ORDERING CODES E-1
BeFREE 10 – TECHNICAL OVERVIEW
E. ORDERING CODES
E.1. BeFREE 10
1 2 3 4 5 6 7 8 9
B F 1 0 - J D 2 - R U 0 - C15 C 25 - x x x
1 – Module Type
BF – BeFREE (touchcomputer) module
2 – Model
10 : Integrated Intercom, 10.4” LCD
3 – Embedded Computer
J : Intel Celeron J1900 @ 2.0 GHz with 4 GB RAM
4 – Version & Connectivity
D2 : Fanless version with audio features (“Dispatcher”)
5 – Touchscreen Technology
R : ELO Resistive (zero-bezel)
6 – Integrated Audio Options
U : USB Speakerbox functionality
C : USB Speakerbox functionality with Echo-Cancellation Circuitry
V : USB Speakerbox functionality without goose-neck microphone
7 – Reserved
0 : none
8 – Housing Colour
C15C25 : black (C15) with black matte (C25) top part of the housing
This part of the code is not mandatory if the colour is C15C25, what is a
default.
9 – Custom Version
Three-digit number reserved for product modifications. It is omitted in case of
standard version.
Note 1:
BeFREE 10 requires 12VDC power supply to operate (see Chapter A.2). The respective
AC/DC adapter is included in the packaging, along with the EU power cord. For
installations where AC/DC adapter needs to be placed further away (more than about 1m)
from the BeFREEE 10 Tipro offers the DC power extension cable (Ordering Code TM-
CPH) which is 1.5 m long.
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E. ORDERING CODES E-2
BeFREE 10 – TECHNICAL OVERVIEW
E.2. Inclination Mechanism
1 2 3 4 5
T M - S U A - C 1 5 - x x x
1 – Accessory Type
S – Mechanical Support mechanism (Inclination Mechanism)
2 – Mechanism Type
U : Universal
3 – Adapter Type
A : All BeFREEs (except for BeFRE 15)
4 – Colour
C15 : black
This part of the code is not mandatory if the colour is C15, what is a default.
5 – Custom Version
Three-digit number reserved for product customizations. It is omitted in case
of standard version.
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F. REFERENCES F-1
BeFREE 10 – TECHNICAL OVERVIEW
F. REFERENCES
1. “BeFREE 22” – Technical Overview
2. “BeFREE 20” – Technical Overview
3. “HANDSET” – Technical Overview
4. “SPEAKERBOX” – Technical Overview
5. “BeFREE 15” – Technical Overview
6. “ChangeMe” – User’s Manual
7. “HID API” - Reference Manual
8. “Modularity Demystified” – “Dispatching Hints & Tips” White Paper – Issue No. 001
9. “Hook & PTT in Software” – “Dispatching Hints & Tips” White Paper – Issue No. 004
10. “HID Telephony Interface” – “Dispatching Hints & Tips” White Paper – Issue No. 005
11. “BeFREE 10/20 External Programming” – “Dispatching Hints & Tips” - Issue No. 006
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G. NOTICES G-1
BeFREE 10 – TECHNICAL OVERVIEW
G. NOTICES
G.1. Disclaimer
Information furnished by Tipro is believed to be accurate and reliable. However, Tipro
makes no representations or warranties regarding the accuracy or completeness of the
contents of this document and reserves the right to make changes to specifications and
product descriptions at any time without notice.
G.2. Copyright Notice
2013-2017 Tipro. All rights reserved. Trademarks and registered trademarks are the
property of their respective owners.
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