RTX RTX725 Series User manual

RTX725x GUIDE 1.0
Proprietary and Confidential
High-End Headset Guide for
RTX725x
Installation & Configuration
Network Deployment
Operation & Management
Technical Reference Document
Version 1.0
© Apr-2020 RTX A/S, Denmark

RTX725x GUIDE 1.0
Proprietary and Confidential
Trademarks
RTX and the combinations of its logo thereof are trademarks of RTX A/S, Denmark.
Other product names used in this publication are for identification purposes and maybe the trademarks of their
respective companies.
Disclaimer
The contents of this document are provided about RTX products. RTX makes no representations with respect to
completeness or accuracy of the contents of this publication and reserves the right to make changes to product
descriptions, usage, etc., at any time without notice. No license, whether express, implied, to any intellectual property
rights are granted by this publication
Confidentiality
This document should be regarded as confidential, unauthorized copying is not allowed
© Apr-2020 RTX A/S, Denmark, All rights reserved
http://www.rtx.dk

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Table of Contents
High-End Headset Guide for RTX725x ................................................................................................................................1
1About This Document.................................................................................................................................................5
1.1 Audience ...........................................................................................................................................................5
1.2 When Should I Read This Guide ........................................................................................................................5
1.3 What’s Inside This Guide...................................................................................................................................5
1.4 What’s Not in This guide ...................................................................................................................................5
1.5 Abbreviations ....................................................................................................................................................5
1.6 References/Related Documentation.................................................................................................................6
1.7 Document History ............................................................................................................................................. 6
1.8 What is new.......................................................................................................................................................6
1.9 Documentation Feedback .................................................................................................................................6
2Package overview ....................................................................................................................................................... 7
2.1 Content..............................................................................................................................................................7
2.2 Damage inspection............................................................................................................................................ 7
3System design.............................................................................................................................................................8
3.1 DECT Registration..............................................................................................................................................8
Handover to VoIP multicell systems .............................................................................................................9
3.2 Bluetooth registration.......................................................................................................................................9
4About the device.......................................................................................................................................................10
4.1 Type of RTX725x headsets ..............................................................................................................................10
4.2 Features of the RTX725x series.......................................................................................................................10
4.3 Headsets overview..........................................................................................................................................12
Ear cushions................................................................................................................................................13
Physical buttons..........................................................................................................................................14
4.4 LED overview...................................................................................................................................................15
LED patterns................................................................................................................................................15
LED indication .............................................................................................................................................15
4.5 Battery.............................................................................................................................................................16
5Features overview ....................................................................................................................................................17
5.1 Eco mode.........................................................................................................................................................17
5.2 Auto answer/mute..........................................................................................................................................17
5.3 BT/DECT call control........................................................................................................................................17
5.4 Headset Music control ....................................................................................................................................17
5.5 Summary .........................................................................................................................................................18
6Regulatory compliances............................................................................................................................................ 20
6.1 Safety & Type approvals.................................................................................................................................. 20
6.2 Environmental compliances............................................................................................................................21
APPENDIX.......................................................................................................................................................................... 22

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7DECT cradle registration ...........................................................................................................................................22

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1About This Document
This document describes the configuration, management, operation and maintenance of the RTX725x headset series
which are part of the range of the DECT system. For customer specific modes, please refer to specific customer
agreements.
1.1 Audience
This guide is intended for everyday users. Furthermore, network administrators, IT support and anyone who wishes to
gain knowledge on the fundamental features of the RTX725x headset series can also benefit from this material.
1.2 When Should I Read This Guide
Read this guide before you install the devices and before setting up the DECT connection.
This manual will enable you to set up components in your network to communicate with each other and deploy a fully
functionally system.
1.3 What’s Inside This Guide
We summarize the contents of this document in the table below:
WHERE IS IT?
CONTENT
PURPOSE
CHAPTER 2
Package overview
Presents the package content and handling
CHAPTER 3
System design
Gives an overview of how RTX725x communicates in the
system
CHAPTER 4
About the device
Provides information on the device specifications and
hardware
CHAPTER 5
Features overview
Introduces the supported features on the headset
CHAPTER 6
Regulatory compliances
Presents the adherence to the laws and regulations
CHAPTER 7
(APPENDIX)
DECT cradle registration
Illustrates the steps behind the process
1.4 What’s Not in This guide
Since the RTX725x series covers 3 different headsets, one of them (RTX7251) will not be covered in detail in this
document. However, in general, it follows the same specification as the RTX7252. More details about the different
headsets can be seen in the beginning of the document.
Furthermore, the paper is not intended as a comprehensive reference to details and specific steps on how to
configure other vendor specific components/devices. For such a reference to vendor specific devices, please contact
the respective vendor for documentation.
1.5 Abbreviations
For this document, the following abbreviations hold:
DECT: Digital Enhanced Cordless Telecommunications
MWI: Message Waiting Indicator
PCBA: PCB Assembled
MFB: Multi-Function Button
BT: Bluetooth

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1.6 References/Related Documentation
PC tool
Base guide
1.7 Document History
REVISION
AUTHOR
ISSUE DATE
COMMENTS
1.0
DKO
07.05.2020
First release
1.8 What is new
What new features have been added.
VERSION
FEATURE
V1.0
First release
1.9 Documentation Feedback
We always strive to produce the best and we also value your comments and suggestions about our documentation. If
you have any comments about this guide, please enter them through the Feedback link on the RTX website. We will
use your feedback to improve the documentation.

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2Package overview
Prior to opening, examine the shipping package for evidence of physical damage. If there is proof of mishandling prior
to opening, you must report it to the relevant support center of the regional representative or operator.
2.1 Content
Make sure all relevant components are available in the package before proceeding to the next step. In principle, every
shipped headset unit package/box contains the following items:
1x headset
1x base station (charger)
1x PSU fixed
1x USB C cable
1x 600mAH Li-polymer battery
1x 1-page A5 double side B/W print
Customer specific changes may occur.
2.2 Damage inspection
The following steps are recommended to be followed for damage inspection:
1. Examine all relevant components for damage
2. Make a “defective on arrival - DOA” report or RMA to the operator. Do not move the shipping carton until it
has been examined by the operator. The operator/regional representative will initiate the necessary
procedure to process this RMA. They will guide the network administrator on how to return the damaged
package if necessary.
3. If no damage is found, then unwrap all the components and dispose of empty package/carton(s) in
accordance with country specific environmental regulations.

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3System design
The high-end headsets support the DECT and BT technology to establish connection with other devices. They are used
with the RTX7451 DECT base and Desk Phone / PC / Laptop/ mobile phones. The selected microphone is balanced
together with the headset filters to reduce the background noise to provide an ultimate understandable and clear
speech. On the other hand, the receivers are balanced to the receiver housing and cushion, so the headset will
provide the user an excellent stereo experience.
The figure below (Fig.1) illustrates the high-level description of the system. It provides the basic understanding of the
environment in which the device needs to interact. Both communication possibilities of the RTX725x are presented in
the drawing below.
Fig.1: System overview
3.1 DECT Registration
The headset is registered to the base (RTX7451) by mounting the headset in the cradle (Fig.2). The registration status
can be seen on the base display and a voice prompt can be activated via the PC tool to inform the end-user. The
headset can also register to the RTX374x DECT dongle by placing both headset and dongle in registration mode. On
the headset, this is done by holding the DECT button for 2 seconds. For further details on the registration process,
please refer to Appendix.
Fig.2 DECT registration and charging

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Handover to VoIP multicell systems
The RTX725x headset and RTX7451 base together can integrate into VoIP multicell and dual cell systems. The headset
base will register on behalf of itself and the headset. The two registrations are independent but will be linked logically
as one unit on the VoIP system. The purpose of this integration is to hand over the user’s calls to the VoIP system for
the user to be flexible in terms of location.
Fig.3 Call Handover
3.2 Bluetooth registration
The headset is registered to a Bluetooth device by holding the BT button for 2 seconds. This will enable pairing mode
for the headset which then allows it to be discovered by other Bluetooth devices. The RTX725x can store up to 4
paired BT devices’ information and remain connected to 2 of them at the same time. In case of reaching the limit and
pairing a new device after the 4 existing ones, the oldest device information will be overwritten by the new agent.
Major mobile platforms are supported, such as iOS and Android.
Fig.4 BT connection

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4About the device
The RTX725x series are wireless DECT+BT headsets. As mentioned before, the headset connects to the DECT base,
which acts as a charger for the headset, via the DECT wireless technology. It can also connect via Bluetooth to
supported devices such as mobile phones and Bluetooth compatible desk phones.
A Busy-light indicator on the headband is used to indicate that the user is busy. The headset also features
Environmental Noise Cancellation (ENC) to suppress unwanted environmental noise for the microphone input and
Active Noise Cancellation (ANC) to suppress the noise towards the user. The headset offers DSP assisted echo
cancelling. The length of the headband is adjustable to suit the head-shape of different users and the tilting angle of
the boom can be adjusted to fit the position of the mouth of different people.
The DECT base / charger connects to the PC/laptop. It can access Skype for Business and a defined range of soft call
clients from external vendors, as well as a defined range of desk phones via EHS interface. Call control can be
managed via the base, attached desk phones, soft call clients on the PC or via the buttons on the left earcup of the
headset. A conferencing feature allows up to 4 headsets to connect to the same base –users may be added / removed
from the conferencing call on the fly.
The primary application of the RTX725x is within call centers and office environments allowing the user to access the
internet/VoIP calls and music playback via the PC/BT.
4.1 Type of RTX725x headsets
The headset auto-configures the DECT setup when connecting to the base, thus no country specific variants exist. As
mentioned earlier, the RTX725x series covers 3 different headsets:
Model
Product
Country Variant
RTX7251
DECT Mono high-end
Headset
World wide
(Taiwan, EMEA, Brazil & Uruguay, LATAM, Argentina,
Chile, USA, Canada)
RTX7252
DECT Stereo High-end
Headset
World wide
(Taiwan, EMEA, Brazil & Uruguay, LATAM, Argentina,
Chile, USA, Canada)
RTX7254
DECT Stereo High-end
Headset ANC
World wide
(Taiwan, EMEA, Brazil & Uruguay, LATAM, Argentina,
Chile, USA, Canada)
4.2 Features of the RTX725x series
The features of the above-mentioned headsets are summarized and listed in the table below:
Main headset
features
RTX7251 Mono
RTX7252 Stereo
RTX7254 Stereo ANC
Fold flat design
Yes, 2-way
Ear cup
Ear pads material
Fabric and PU Leather
Ear pads
attachment
Detachable
Over the ear
No
Yes
Yes
On ear
Yes
Yes
Yes

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Ear cup movement
2-axis
Flexible boom
Bendable
Boom movement
270°rotation
Headband material
Plastic and silicone
Headband rachet
30mm±2mm
Ratchet marking
indication (on head
side)
No
Busy light
Integrated on boom arm multi-color LED
Proximity sensor
(Auto Hook off)
Yes
Noise cancellation
ENC
Yes –DSP assisted
ANC
No
No
Yes –DSP assisted
Echo Cancelling
Yes –DSP assisted
No. of
microphones
2
2
6
No. of receivers
1
2
2
No. of buttons
5
6
6
Scroll wheel for
volume control
Yes
Support for Voice
Prompts
Yes
Voice prompt
language
Configurable via PC Tool
English
Included
Call control
Vol+
Scroll wheel up
Vol-
Scroll wheel down
MFB
Answer/end call, etc
DECT
Yes
Conference calls
(supervisor)
4 users
Bluetooth
Yes, BT4.2
Adaptive Power
Control (DECT)
Yes
Handover to VoIP
multicell systems
Yes
Firmware update
support
Via PC Tool
Call status LED
Integrated on boom arm multi-color LED
Narrow band Audio
G726, BV16
Wide band Audio
CELT, G.722, BV32
Super wide band
Yes
Acoustic shock
protection
Yes
UCB C Connector
Yes

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4.3 Headsets overview
The following section aims to give an overview of the headsets and the available buttons. The following drawings
illustrate the dimensions of the RTX725x series headsets.
Fig.5: Dimensions of RTX7251
Fig.6: Dimensions of RTX7252
Fig.7: Dimensions of RTX7254

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The images below represent the styling of all 3 headsets from the RTX725x series. By default, the color is grey, and
the devices have removable ear cushions.
Fig.8: Styling of RTX7252 and RTX7254 Fig.9: Styling of RTX7251
Ear cushions
The cushions of the headsets are removable and replaceable. There are two types of ear cushions –on-ear and over-
the-ear (Fig.7 Ear cushions). The only headset that supports the two types is the RTX7254. A sensor in the headset
detects which type of cushion is used and adapts the audio tuning accordingly in order to get the optimal noise
reduction. The other two devices (RTX7251 and RTX7252) only support the on-ear cushion solution.
Fig.10: Ear cushions

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Physical buttons
The headset is operated using the buttons on the earcup with boom arm. The ANC button is located on the opposite
earcup as ANC is not available for Mono headsets.
Fig.11: Double Bottom view
Fig.12: One-sided view
Fig.13: Back side view

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The following table represents the functions of the buttons seen on the figures above
Input
Functions
Power slider
Power the headset on and off
Scroll wheel with an
integrated key
Increase volume
Decrease volume
Play/Pause music
Skip to next track
Multi-Function Button
Answer call
End call
Reject call
Trigger AI voice assistant
Toggle busy
Mute key
Toggle mute
Announce battery level
DECT key
Enter DECT pairing mode
Reset settings
BT key
Toggle Bluetooth
Enter Bluetooth pairing mode
ANC key
Toggle ANC
4.4 LED overview
The headset has a single tricolor LED on the tip of the boom-arm, which is a combination of 3 LEDs –red, green and
blue. All visual indications are disabled if “eco mode” is enabled.
LED patterns
The LED supports 3 different kinds of patterns. The definitions of each pattern can be seen in the table below:
LED pattern
Definition
Blink
ON-OFF
Breathing
One color that slowly becomes brighter until it reaches full brightness and then
dimmers until fully dimmed. It is a repeated cycle.
Alternating
Alternating between two colors
LED indication
The table below presents the LED indication depending on the status of the headset.
Function
Status LED color Pattern
System
Reset setting started
Purple
Blink 3 times
Bluetooth registration
Registration, In progress
Blue, red
Alternating
Registration, Success
Green
Blink 3 times
Registration, Failed
Red
Blink 3 times

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DECT registration
Registration, In progress
Blue, red
Alternating
Registration, Success
Green
Blink 3 times
Registration, Failed
Red
Blink 3 times
Battery status
No battery
Cyan
Blink
Fully charged
Green
ON
Charging
Green
Breathing
Low
Red
Breathing
Busy mode
Busy enabled or call
active
Red
ON
4.5 Battery
The headsets use 600mAH Li-polymer battery, which is easily replaceable after removing the battery lid, as illustrated
on the image below.
Fig.14: Battery lid removed
The RTX725x can be charged in 2 ways. One of the options is placing the headset in the cradle of the base, which
displays the charging status. Another way to charge the device can be with the use of a USB cable, where the status
will be shown on the boom-arm LED. For more details about the battery LED indications, please refer to the previous
section 4.4.2 LED indication. The battery performance can be seen in the summary table of features in section 5.5.
Summary.

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5Features overview
This section aims to introduce you to the available features of the headset series RTX725x. Some of the features will
be briefly described through the sections below, whereas the main highlights will be presented via a table with
function descriptions.
5.1 Eco mode
RTX725x headsets support ECO mode which increases the talk time to 12 hours. This is done by limiting some of the
features, such as power consumption of the LED indication and audio codec selection. This means that the BV16
narrowband codec is used during ECO mode and the LED is be dimmed or turned off to save power.
5.2 Auto answer/mute
The RTX725x series uses a proximity sensor to detect when the user is wearing or removing the headset. This means
that the sensor is used to trigger two events:
Auto answer of an incoming call when user places the headset on the head
Auto mute/unmute a call when user removes/places back the headset on the head
These two settings can be managed in the “Device settings” of the PC setup tool software. The user should bear in
mind that even if these settings are enabled, the user’s actions will dominate. This means, for example, if the user
enables the auto mute feature and then mutes the call while the headset is on their head, the call will remain muted
even if the user removes and places back the headset on the head.
5.3 BT/DECT call control
The following table illustrates the headset key functionalities and the related call control events when pressed.
Key button
Press
Double Press Long Press
Multi-Function
Accept/End call
Reject call
Hold/Resume call
Volume Roll Up
Increase the volume
-
-
Volume Roll Down
Decrease the volume
-
-
Mute
Mute/Un-mute
-
-
BT
Toggle BT on/off
-
BT pairing mode
The RTX725x supports 2 active calls, meaning that the 3rd incoming call will be rejected or ignored. If during a call the
user receives an incoming call, the call can be rejected by double pressing the Multi-Function key or accepted by long
pressing the same key. The long press will answer the incoming call and put on hold the current one.
5.4 Headset Music control
The user can control the music features by pressing the available keys on the headset. Volume control is supported in
smartphones with operating system older than 6.0 for Android and 5.0 for iOS. The volume levels will be synchronized
between the headsets and the audio device. The keys will trigger the following events presented in the table below:
Key button
Press
Double Press Long Press
Mute
Play/Pause music
Skip to next track
-
Volume Roll Up
Increase the volume
-
-
Volume Roll Down
Decrease the volume
-
-
BT
Toggle BT on/off
-
BT pairing mode

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5.5 Summary
The table below presents a summary of the features available in the headsets.
Input
Functions
DECT frequency bands:
1880 –1895 MHz (Taiwan)
1880 –1900 MHz (EMEA)
1910 –1920 MHz (Brazil & Uruguay)
1910 –1930 MHz (LATAM, Argentina, Chile)
1920 –1930 MHz (USA, Canada)
Narrowband Audio:
G.726, BV16
Wideband Audio (HD):
G.722, BV32
Music
128 kbit/s CELT
LED Indicator
Status LED
Tri color
Visibility
Mic boom tip
Hardware Features
Battery type
Lithium Polymer, replaceable
Battery capacity
600 mAh
Microphones
2 for talk (ENC) and 4 for ANC
Headset interface
USB to connect to the RTX7451 base
Charging terminals
Using USB
Operating conditions
-0 ⁰C to 45⁰C
Battery Performance
Talk time DECT
Up to 20 hours
Talk time BT
Up to 10 hours
Standby time DECT only:
Up to 100 hours
Standby time DECT+BT:
Up to TBD hours
Charge time (0% - 90%)
3 hours
Quick charge
25% in 30 minutes
Charge stop temperature
Low temperature stop charge: 5⁰C
High temperature stop charger: 40⁰C
Audio Features
Earpiece volume
See volume table
Coverage warning
On/Off
Language
Supported:
English (Voice prompts)
Call features
Call waiting
Yes
Hold / Retrieve
Yes
No. of simultaneous calls
2, only one on hold
Call Conference
Yes
Call Swap
Yes
DECT
Output Power
250 mW
140 mW (Uruguay, Canada, US, Malaysia, Jordan)
22 dBm (Chile, Australia)
Sensitivity
-92 dBm
Antenna
2 for fast antenna diversity

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Range (max)
200m outdoor
Security
Class C
Standard DECT interface
Yes
Handover to VoIP multicell
systems
Yes
Software Update
Downloadable
Yes
Air-interface
Yes
Bluetooth
No. of pairings
4
BT Version
4.2 Classic
Frequency
2401 MHz –2480 MHz
Sensitivity
Better than -92 dBm @ DH1, measured at
antenna
Output power
Class 2, 2,5mW (4dBm)
Range
10 meters in free line of sight measured outsight
Antenna
The antenna performance should be designed to
have a return loss of < -5dB in the relevant
frequency band
Simultaneous connections
2
Profiles
-A2DP
1.2 Advanced Audio Distribution Profile
-Hsp
1.2 Headset Profile
-HFP
1.6 Handsfree Profile
-DIP
1.3 Device ID Profile
-AVRCP
1.4 Audio/Video Remote Control Profile
Codec
-SBC
For stereo streaming of music
-mSBC
For wideband audio
-CVSD
For narrowband audio
Audio Codec
BV16
G.726
BV32
G.722
CELT48
Class of device
0x200404 Headset device
0x200418 Headphones
Bluetooth device address
The address is stored in non-volatile memory
Bluetooth device name
The product shall use the name “XXXXXXXX” *
Encryption
Default 128-bit encryption
Pairing mode
Discoverable only by user request and limited time 1 minute
Automatic connect
An already paired Bluetooth device will automatically connect to the headset.
Others
HAC compliant
Yes

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6Regulatory compliances
6.1 Safety & Type approvals
The regulatory compliance and measurements reports required are:
Approval
Standard
GENERAL SAFETY
Safety
CB IEC62368, EN62368, IEC60950, EN60950
Including the country deviation to US/CA,
AU/NZ and EU
Safety
UL62368, and NRTL for US and CA
Safety
CB Scheme Certificate
US
FCC
FCC Part 15B
FCC
FCC Part 15D
FCC
FCC Part 15.247
FCC
FCC SAR evaluation
FCC
FCC ID
CANADA
IC
ICES-003 Issue 6, 2016
IC
IC RSS-213 Issue 3,March 2015
IC
IC RSS-102 issue 5 SAR evaluation
IC
IC RSS-247
IC
IC REL Cert and registration
IC
ISED ID
EUROPEAN
CE
EN55032:2015 EMC-EMI&EMS
EN55024:2010
EN55035
CE
EN62479:2010
CE
EN301489-1 V2.2.0 (2017-03)
EN301489-6 V2.2.0 (2017-03)
EN301489-17 V3.2.0 (2017-03)
CE
IEC61000-4-2 Level 3
EN61000- 4-3 Level 3
CE
EN301406V2.2.2(2016-09)
EN300328V2.1.1(2016-11)
CE
SAR-EN62209-1:2006/EN62209-2:2010 ;
EN50360 :2001+A1:2012 EN 50566:2013/AC:2014
CE
AOC certificate
AUSTRALIA/NZ
RCM
AS/NZS CISPR 32:2015
RCM
EMC-AS/NZS CISPR 22:2009+A1:2010
RCM
RF-AS/NZS 4268:2017
RCM
SAR-AS/NZS 2772.1; AS/NZS 2772.2:2011
RCM
Acoustic AS/CA S004
RCM
HAC AS/ACIF S040