DRG-Series. Digital Radio Gateway. Hytera DMR IP (Tier-2) Digital Radio Supplement

Transcription

1 DRG-Series Digital Radio Gateway Hytera DMR IP (Tier-2) Digital Radio Supplement

2 DRG-Series Digital Radio Gateway Hytera DMR IP (Tier-2) Digital Radio Supplement 2017 Omnitronics Pty Ltd. All rights reserved. ABN: Product Notice No part of the contents of this publication may be reproduced or transmitted in any form or by any means without the prior written consent of Omnitronics. Information contained in this document is provided solely to enable use of Omnitronics products. Omnitronics assumes no liability whatsoever for neither technical or editorial errors that may appear in this document nor does it make a commitment to update the information contained herein. Omnitronics retains the right to make changes to this information at any time and without notice. Trademarks Hytera is a trademark of Hytera Communications Corp Ltd. DRG100, DRG200i, Alto, RediTALK, and the Omnitronics name and logo are trademarks of Omnitronics Pty Ltd. All other brand names are the property of their respective owners. Technical Support If you require additional information or assistance with installation or configuration of this product, please contact our technical support at support@omnitronics.com.au or your local sales representative at the appropriate telephone number shown below. When contacting Omnitronics for support, please have your Omnitronics product serial number, system hardware, and system software versions available. Head Office: Omnitronics Pty Ltd 27 Sarich Court Osborne Park, WA 6017 Australia PH: FAX: main@omnitronics.com.au International Sales Office: Omnitronics Pty Ltd 301 Coronation Drive Milton, QLD 4064 Australia PH: FAX: sales@omnitronics.com.au North America Office: Omnitronics, Inc Cypress Plaza Drive, Suite 103 Jacksonville, FL USA PH: +1 (904) FAX: +1 (904) sales@omnitronicsworld.com Documentation Feedback Spot an error in this document or have a suggestion for improving it? Omnitronics welcomes your feedback regarding this manual. To provide feedback, please your comments to documentation@omnitronics.com.au. Be sure to include the Omnitronics product name and version with your correspondence. Omnitronics will carefully consider all feedback for future improvements to Omnitronics documentation and software. Date: April 2017 Document Number: MNL ii

3 Document Revision History Issue Date Description /2017 Original publication Please report any errors or omissions in this document to Omnitronics so that such errors or omissions may be corrected in later issues (see Documentation Feedback on page ii). iii

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5 Contents About this Manual Overview... vii Intended Audience... vii Related Documentation... vii Capabilities Supported... viii Chapter 1 Configuration 1 Viewing the System Status...2 Viewing the Hytera DMR IP Status...3 Digital Radio Configuration...4 Common Digital Radio Settings...5 Omnitronics Gateway Interface...5 Digital Radio Settings...5 Call Timeouts...6 Hytera DMR IP Interface Settings...8 Hytera Settings...9 Network Settings...9 Heartbeat Services Chapter 2 Diagnostics and Statistics 11 Digital Radio Diagnostics Digital Radio Call Call Setup Busy Activate Channel Change Send Text Message Remote Radio Commands Radio Status vii v

6 Statistics Hytera RTP Statistics Hytera Forwarding Statistics (Slot 2) Omnitronics RTP Statistics Appendix A Interface Information 21 Connecting the DRG Known Issues Notes 23 vi

7 About this Manual Overview The DRG-Series of Digital Radio Gateway devices supports many digital-radio functions. However, not all digital radios support all of these functions. Therefore, the DRG device is programmed at the factory for a particular digital-radio interface depending on the type of digital radio you intend to use. This publication supplements the information contained in the DRG-Series Product Manual supplied with your DRG device. The information presented covers the configuration and diagnostics of the Hytera DMR IP (Tier-2) Digital- Radio Interface implemented in your DRG. This interface is designed to operate with the Hytera RD962/982 portable digital repeater via Ethernet. Intended Audience This supplement is intended for technical support personnel, system and network administrators, who install, configure and maintain the DRG device. Related Documentation In addition to this supplement, the following provides related information. DRG100 Digital Radio Gateway Product Manual (MNL-00106) DRG200i Dual-Channel Digital Radio Gateway Product Manual (MNL-00166) DRG600i 6-Channel Digital Radio Gateway Product Manual (MNL-00169) The following documents define the relevant protocols implemented in the DRG device, which are all available as RFC documents from the Internet Engineering Task Force (IETF): RFC RTP: A Transport Protocol for Real-Time Applications RFC RTP Profile for Audio and Video Conferences with Minimal Control vii

8 RFC RTP Payload for DTMF Digits, Telephony Tones and Signals RFC SIP: Session Initiation Protocol RFC An Offer/Answer Model with the Session Description Protocol RFC SDP: Session Description Protocol Capabilities Supported The capability matrix below lists the features supported by DRG devices implementing the Hytera DMR IP Conventional or Hytera DMR USB Donor Digital Radio Interfaces and how these interfaces compare to the DX- Altus/Alto and RediTALK systems Capability matrix Capability DX-Altus + Alto RediTALK Hytera DMR T2 USB Donor (MD782G) Hytera DMR T2 IP Conv Rptr (RD962/982) Notes Channel Change Individual Call Group Call All Call Default Call Digital Radio Linking Call Alert Console to radio only Individual Text Console to radio only Group Text Console to radio only Emergency Voice Call Radio to console only Emergency Alert Msg Radio Status Msg Poll Radio Status Radio Check Remote Monitoring Radio Disable/Stun Radio Enable/Revive Radio Kill Lone Worker Man Down Scanning Talkgroup Registration NA NA Applicable only to trunk protocols Basic GPS Location Services Advanced GPS Loc Services Request radio GPS location = Supported; = Not supported; = Partially supported (feature not fully tested with third-party radios) NA = Not Applicable viii

9 Chapter 1 Configuration This chapter discusses the configuration of the DRG implementing the Hytera DMR (Digital Mobile Radio) IP (Tier-2) digital-radio interface. All web page images included in this supplement are specific to the DRG100 device; however, the web pages for the other DRG devices will be similar. This chapter includes the following sections: Viewing the System Status on page 2 Viewing the Hytera DMR IP Status on page 3 Digital Radio Configuration on page 4 Hytera DMR IP Supplement 1

10 Chapter 1, Configuration Viewing the System Status Select System Status to display system information about the DRG device. All the values displayed on this page are read-only so you cannot make any changes to these values. Figure 1 shows an example when logged in under the administrator account the technician and limited-user accounts show the same information. Common information Shows status information common to all digital-radio interfaces Interface information Shows status information specific to Hytera DMR-IP digital-radio interface Figure 1. System status page for Hytera DMR IP interface 2 DRG-Series Digital Radio Gateway

11 Most of the information shown on this page is the same for all digital-radio interfaces supported by the DRG for further information, refer to the respective DRG-Series Product Manual. The information that is specific to the Hytera DMR IP Tier-2 interface appears under Digital Radio: Hytera DMR Status and Digital Radio: Hytera DMR Service Status. This is discussed in the following section Viewing the Hytera DMR IP Status on page 3. Viewing the Hytera DMR IP Status Figure 2 shows the typical interface information you will see for a DRG device implementing the Hytera DMR IP interface. Figure 2. System Status page showing Hytera DMR IP Status The information displayed under the Hytera DMR IP Status section includes the following: Radio connection shows the status of the connected radio and whether the DRG is communicating with it correctly. The normal status for the radio is Connected ; otherwise this will show Disconnected. Time since valid RTP packet shows the elapsed time since the last RTP packet was received. The information displayed under the Digital Radio: Hytera DMR Service Status section includes the status of the DMR services together with the ports used and the total number of packets received and transmitted. Hytera DMR IP Supplement 3

12 Chapter 1, Configuration Digital Radio Configuration Select Digital Radio to display the Digital Radio configuration page similar to the one shown in Figure 3. This page allows you to disable some of the digital radio capabilities and is the same in basic and advanced modes. Figure 3. Digital radio configuration page for common settings The settings on this page are common to all digital-radio interfaces and are discussed in the section Common Digital Radio Settings below. 4 DRG-Series Digital Radio Gateway

13 Common Digital Radio Settings The Digital Radio tab includes digital radio settings that are common to all interfaces. Omnitronics Gateway Interface The information displayed under Omnitronics Gateway Interface is the same regardless of the digital-radio interface you are configuring, and includes only the following setting: TCP Port is the port the DRG uses for incoming TCP connections the DRG acts as a TCP server accepting incoming connections on this port from other Omnitronics devices. Digital Radio Settings This group of configuration settings controls whether a specific capability is published to the DX-Altus Server, and therefore visible on an Omnitronics Dispatch Console. Some settings may not be supported by your DRG. Disable Channel Change option allows you to disable the capability to change the channel on the radio (this capability will be preconfigured by software provided by the radio manufacturer). Disable Call Alert option disables the ability for the console operator to send a call alert to a radio requesting that the radio operator call back the console operator (the radio operator acknowledges the alert by pressing PTT). Disable Individual Call option disables the ability to initiate an individual call from a console. Disable Individual Call Timeout option disables individual-call timeouts. Individual Call Timeout is the time (in seconds) that the DRG will wait for individual call activity before it cancels the individual call and reverts to broadcast mode. This timeout is only used when the Disable Individual Call Timeout option is not selected. Disable Group Call option disables the ability to initiate a group call from a console to a group of radios. Disable Group Call Timeout option disables group-call timeouts. Group Call Timeout is the time (in seconds) that the DRG will wait for activity before it cancels the group call and reverts to broadcast mode. This timeout is only used when the Disable Group Call Timeout option above is not selected. Hytera DMR IP Supplement 5

14 Chapter 1, Configuration Disable All Call Timeout option disables the All Call timeout and allows the console operator to immediately setup a new call without the need to wait or cancel the All Call. If this option is not selected (i.e., the timeout is enabled), console operators will have to wait for the timeout before a new call setup is allowed. All Call Timeout is the time (in seconds) that the DRG will wait for activity to cease before it cancels the All Call and reverts to broadcast mode. This timeout is only used when the Disable All Call Timeout option is not selected. Call setup timeout is the timeout applied to call setup when the console operator does not PTT within a reasonable time (see Figure 4 on page 7). The Alto console operator can send a request to set up a specific call type. If the operator presses PTT within the specified timeout, the DRG will set up this call type. However, if no PTT is received during this timeout, the DRG will revert to its default call state. If an incoming call is received during this timeout, the DRG will accept the incoming call and it will void the operator s original request. In this case, the operator will have to request the call type again after the incoming call is terminated. Disable Emergency option disables access to the Emergency feature from the DRG and any connected dispatch consoles such as Alto. Disable Text Messaging disables the ability to send a text message to a specific radio or to a group of radios. Disable GPS disables the ability to forward GPS information received from the radio to consoles (assuming the radio is configured to forward GPS information). Disable Radio GPS Request Update disables the ability for a console to request the GPS location of a specific radio matching the Radio ID supplied by a console. Disable Monitor Radio disables access to the Monitor Radio feature from the DRG and any connected dispatch consoles such as Alto. Call Timeouts Call timeouts applicable to the digital-radio interface are illustrated in the timing diagram depicted in Figure 4. The purpose of a call timeout is to ensure the connection (call type and recipient) is maintained during overs so that the call is not prematurely disconnected. 6 DRG-Series Digital Radio Gateway

15 If no further activity (BUSY/PTT) is detected during the time specified by the call timeout, the call will automatically disconnect. The timeouts for each call type (IND, GRP, ALL) can be enabled or disabled, and configured independently. If the call timeout associated with a particular call is not disabled, the DRG will maintain the connection (call type and recipient), and reset the call timer after every over. If the call timeout occurs (no one pressed PTT within the timeout), the DRG will revert to the default call type. This means that the next PTT will then set up an All call. If the timer expires while a BUSY/PTT is active, the timer restarts. If the call timeout associated with a particular call is disabled, the DRG will apply the default call configuration (All call). Keep in mind that the radio itself may have similar timers that cannot be interrogated by the DRG, and if these timers clash with those on the DRG, the DRG will not behave as expected. It is advisable that you always set the DRG timers greater than the actual radio timers. Figure 4. Digital radio timing diagram showing call timeouts Hytera DMR IP Supplement 7

16 Chapter 1, Configuration Hytera DMR IP Interface Settings Select Digital Radio under the Configuration menu, and then select Hytera DMR to display the configuration page similar to the one shown in Figure 5. This page shows the digital-radio configuration for the Hytera DMR IP digital radio interface the same settings are available in both Basic and Advanced modes. The term radio is used in the following discussion to mean the Hytera DMR radio repeater or base station. Figure 5. Digital radio configuration for Hytera DMR IP 8 DRG-Series Digital Radio Gateway

17 Hytera Settings Transmit Gain is the gain (-10dB to +10dB) applied to the digital audio sent to the Hytera DMR-IP base station. Receive Gain is the gain (-10dB to +10dB) applied to the digital audio received from the Hytera DMR-IP base station. Network Settings Slot Mode specifies the type of radio timeslot mode implemented by the DRG. The Hytera DMR IP T2 proprietary interface can be configured for a specific slot mode, and supports audio, radio control, text messaging, and location services for both timeslots. DRG A Slot1 This mode is the default mode and Slot 1 will be utilised by the local DRG to connect to the radio. The local DRG in this mode is the primary DRG. DRG A Slot2 DRG A Slot1 Forward Slot2 to DRG B Slot 2 will be utilised by the local DRG to connect to the radio. The local DRG in this mode is the primary DRG. Slot 1 will be utilised by the local DRG to connect to the radio. The local DRG in this mode is the primary DRG. All packets received on Slot 2 from the radio will be forwarded to the secondary DRG, which in this case is DRG B. This allows forwarding of all audio, call control, GPS locations, and Text messaging to DRG B. DRG B Slot2 Slot 2 will be utilised by the local DRG to connect to another primary DRG. The local DRG in this mode is the secondary DRG. This mode requires the remote primary DRG to be configured with mode DRG A Slot 1 Forward Slot2 to DRG B (where DRG B connects to this DRG). Radio ID is the unique identity assigned to the radio, and should match the one programmed into the radio. Radio IP address is the IP address of the radio. The radio interface provides different services on specific ports (see Services on page 10). Hytera DMR IP Supplement 9

18 Chapter 1, Configuration DRG A IP address is the IPv4 address of the primary DRG Slot 1. DRG B IP address is the IPv4 address of the secondary DRG Slot 2. Heartbeat Heartbeat Interval is the interval in seconds that the DRG will send a heartbeat to the radio to keep the connection open. The radio should respond accordingly within a reasonable time; otherwise the DRG will send another heartbeat at the next interval. Heartbeat lost count is the maximum number of lost heartbeats that the DRG will send to the radio before the connection is considered to be disconnected. The DRG will terminate the connection locally and report the radio is disconnected. Maximum number of retries is not used in this implementation. Services The following properties will be enabled or disabled depending on which Slot Mode is configured. Each service requires a UDP port to be associated with a particular slot, and it must be the same for transmit and receive. GPS Slot1 port is the UDP port used for connecting to the radio s GPS Location Service on Slot 1. GPS Slot2 port is the UDP port used for connecting to the radio s GPS Location Service on Slot 2. TMS Slot1 port is the UDP port used for connecting to the radio s Text Messaging Service on Slot 1. TMS Slot2 port is the UDP port used for connecting to the radio s Text Messaging Service on Slot 2. Call Control Slot1 port is the UDP port used for connecting to the radio s Call Control Service on Slot 1. Call Control Slot2 port is the UDP port used for connecting to the radio s Call Control Service on Slot 2. Voice Service Slot1 port is the UDP port used for establishing RTP connections to send and receive voice on Slot 1. Voice Service Slot2 port is the UDP port used for establishing RTP connections to send and receive voice on Slot DRG-Series Digital Radio Gateway

19 Chapter 2 Diagnostics and Statistics In this chapter, we discuss the diagnostic features of the DRG and how to use these features with the Hytera DMR digital-radio interface. This chapter includes the following topics: Digital Radio Diagnostics on page 12 Statistics on page 16 Hytera DMR IP Supplement 11

20 Chapter 2, Diagnostics and Statistics Digital Radio Diagnostics Select Digital Radio under Diagnostics to view the Digital Radio Diagnostics page similar to the one shown in Figure 6. This page is used for performing basic diagnostics and troubleshooting of the digital-radio interface. If you have disabled some of the capabilities, the number of options available on this page will be reduced. For instance, if Text Messaging is disabled, the fields related to the Text Messaging capability will not be visible. Figure 6. Viewing the digital radio diagnostics page for Hytera DMR IP interface 12 DRG-Series Digital Radio Gateway

21 Digital Radio Call The Digital Radio Call section includes several diagnostic tools as discussed below. Call Setup Use the tools in this section to set up and test a particular call type. Call Type determines the type of digital radio call to make. Depending on the call type, it may occur as soon as you click Setup Call or it may occur on the first Push-To-Talk request after you click Setup Call. The types available will depend on the capabilities and configuration of the radio but may include: Default Call Type Next radio call will be the default for this radio. Individual Call Group Call All Call Call Alert A call to a single radio. A call to all radios in a particular group. Calls all radios on the network. Sends an alert to one radio. This is sent immediately without waiting for a the next Push To Talk request. Some of these call types may not be available depending on whether the corresponding call-type option is disabled on the Digital Radio page. For further information about these options, refer to Common Digital Radio Settings in Chapter 1, Configuration on page 5. Destination: Radio ID or Group ID is the identity of the radio or group of radios to which you want to send the message. To set up a particular call to a radio, or group of radios, select the call type from the Call Type dropdown, type the numerical destination into the Destination: Radio ID or Group ID text box, and then click Setup Call to send the request to the radio this may occur as soon as you click the button or it may occur on the first Push-to-Talk. The call type should appear next to the Call Type under the Radio Status section (see Radio Status on page 15). Hytera DMR IP Supplement 13

22 Chapter 2, Diagnostics and Statistics Busy Activate Toggle Busy allows you to simulate and test the busy signal on this DRG. This is useful when you suspect the busy signal from the repeater/base station is not detected. To simulate and test the busy signal, click Activate Busy. This should send a busy indication to the dispatch console so you can check whether the busy indication operates as expected. You should also see the busy indication under Radio Status section (see Radio Status on page 15). When you are done, click the button again to stop the test. Channel Change You can use this section to change the channel of the radio. Channel Number is the number of the radio channel to select. Type the channel number into the Channel Number text box, and then click Set Channel to send the channel-change request to the radio. This changes the channel on the radio to that specified by the Channel Number setting. This section may not be visible depending on whether the option to disable channel change is selected (see the Disable Channel Change option on page 5). Send Text Message You can use this section to send a text message to the specified radio or group of radios. Message Type allows you to select the type of message to send, which can be Individual or Group. Destination: Radio ID or Group ID is the identity of the radio, or the group of radios, to which you want to send the message. Type your text message into the text box and click Send Text to send the message. Remote Radio Commands You can use this section to send commands to the remote radio. Command is the command you want to send to the radio. 14 DRG-Series Digital Radio Gateway

23 The commands available will depend on the capabilities and configuration of the radio but may include: Radio Check Stun Radio Revive Radio Monitor Radio Sends a message to a particular radio ID to determine whether the radio is powered on and receiving. Sends a message to a radio terminal that will temporarily disable the radio. Sends a message to a radio terminal that has previously been stunned to revive the radio. Sends a message to radio terminal and places the radio into monitor mode. Some of these commands may not be available depending on whether the corresponding command option is disabled on the Digital Radio page. For further information about the command options, refer to Common Digital Radio Settings in Chapter 1, Configuration on page 5. Destination Radio ID is the identity of the radio to which you want to send the command. To send a command to the radio, select the command from the Command dropdown list, type the numeric radio identity into the Destination: Radio ID text box, and then click Execute to send the command. Radio Status The Radio Status section displays the current status of the digital radio connected to the DRG. The contents depend on the functionality of the radio and firmware, and may include the following: Communication Status indicates the current communication state of the link between the DRG and the connected digital radio. It shows OK if the communication link is good or failed if the link is not working Push To Talk indicates whether the radio is currently transmitting (ON) or not transmitting (OFF). Busy indicates whether the radio is currently receiving (ON) or not receiving (OFF). Call Type indicates the current active call type, which can be: All Call, Group Call, or Individual Call. Radio ID indicates the identity of the radio that is receiving or transmitting. Channel Number indicates the currently selected radio channel. Hytera DMR IP Supplement 15

24 Chapter 2, Diagnostics and Statistics Statistics Group ID indicates the currently active group (transmitting or receiving). Last Text Message Received shows the last text message received from a radio. Last Text Message Sent shows the last text message sent. Select Statistics under the Diagnostics menu to display the Statistics page similar to the one shown in Figure 7. The page is the same in both basic and advanced modes, and provides statistics about the operation of the DRG. Figure 7. Viewing the Statistics page for the Hytera DMR IP interface 16 DRG-Series Digital Radio Gateway

25 Hytera RTP Statistics This section shows the statistics for the VoIP packets that flow between the DRG and the Hytera DMR interface. Hytera RTP receive total packets shows the total number of Hytera RTP packets received. Hytera RTP receive valid packets shows the number of valid Hytera RTP packets received from the remote device. Hytera RTP receive invalid packets shows the number of packets received via the Hytera interface that do not contain valid RTP formatting. Hytera RTP receive valid bytes shows the total number of bytes received via the Hytera RTP interface. Hytera RTP receive sequence errors shows the number of packets that either were not received or which arrived out of order. If this value is large, it indicates that the network is experiencing packet loss or excessive network jitter. Hytera RTP receive packets too late shows the number of Hytera RTP packets arriving too late. If this value is large, it indicates excessive and changing network propagation delays. Hytera RTP receive MULTICAST packets shows the number of Hytera RTP packets received from a multicast address. Hytera RTP transmit packets shows the number of complete network (UDP) VoIP packets sent, but does not include other packets such as web server data or SNMP packets. Hytera RTP transmit bytes shows the total number of RTP data bytes sent, and includes the payload data, but does not include network overhead packets. Hytera Forwarding Statistics (Slot 2) If a DRG device is in slot mode DRG A Slot1 Forward Slot 2 to DRG B, you will see an additional RTP statistics section: Hytera RTP Forwarding Statistics (Slot2). This is the RTP statistics for Slot 2 RTP data forwarded to the secondary DRG (DRG B). The other slot modes do not have this additional Forwarding information. Hytera DMR IP Supplement 17

26 Chapter 2, Diagnostics and Statistics Omnitronics RTP Statistics Under Omnitronics RTP Statistics, you can view the various counters and other useful information, which includes the following: RTP receive total packets is the total number of RTP packets received. RTP receive valid packets the number of valid RTP packets received from the remote device. RTP receive invalid packets is the number of packets received that do not contain valid RTP formatting. If this number is very large, it may indicate that this port is being used by some other network protocol. RTP receive valid bytes is the total number of bytes received via RTP. RTP receive sequence errors indicates the number of packets that either were not received or which arrived out of order. If this value is large, it indicates that the network is experiencing packet loss or excessive network jitter. RTP receive packets too late indicates that a packet containing audio arrived at the DRG after it should have been played. If this value is large, it indicates excessive and changing network propagation delays. RTP receive STUN packets indicates the number of value STUN messages received. Some VoIP clients send STUN messages on the RTP port to help determine network configuration. RTP receive MULTICAST packets is the number of packets received from a multicast address. RTP transmit packets is the number of complete network (UDP) VoIP packets sent, but does not include other packets such as web server data or SNMP packets. RTP transmit bytes is the total number of data bytes sent, and includes the payload data, but it does not include the overhead due to Ethernet protocol. Current transmit bytes per second is an estimate of the current bandwidth usage for VoIP. This will display a non-zero value only if the DRG is currently transmitting audio information. Time since valid RTP packet is the time in milliseconds since the last RTP packet was received. RTCP receive total packets is the total number of RTCP packets received. 18 DRG-Series Digital Radio Gateway

27 RTCP receive valid packets is the number of valid RTCP packets received from the remote device. RTCP receive invalid packets is the number of invalid RTCP packets received from the remote device. If this number is very large, it may indicate that this port is being used by some other network protocol. RTCP receive valid bytes is the total number of bytes received via RTCP. RTCP transmit packets is the number of complete network (UDP) VoIP control packets sent, but does not include other packets such as web server data or SNMP packets. RTCP transmit bytes is the total number of control bytes sent, and includes the payload data, but it does not include the overhead due to Ethernet protocol. Time since valid RTCP packet is the time in milliseconds since the last RTCP packet was received. Hytera DMR IP Supplement 19

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29 Appendix A Interface Information This appendix discusses some important interface information about your DRG device, and includes the following topics: Connecting the DRG Known Issues Connecting the DRG The information in this section includes details about the interface connection requirements. You will need the following hardware to connect the DRG to the Hytera RD962 portable digital repeater: Suitable DC power supply: DRG100: 12V@300mA DRG200i: 12V@700mA Ethernet network connection Known Issues At the date of publication, no known issues reported. Hytera DMR IP Supplement 21

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31 Notes Hytera DMR IP Supplement 23

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36 DRG-Series Digital Radio Supplement for Hytera DMR IP (Tier-2) Copyright 2017 Omnitronics Pty Ltd MNL /17