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All 3G connections are NATted in Hungary, so thereвЂ™s no external address and connection tracking for the UDP packets, so incoming packets canвЂ™t find a way to the repeater.It doesnвЂ™t care about DHCP lease timeouts, it only asks for an IP address in DHCP mode only when we power it on.

The repeater doesnвЂ™t care about an unplugged Ethernet cable, it wonвЂ™t ask for a new IP address.

When the repeater connects to the master, a voice says on TS2 TG9 that the reflector 4770 got connected.

The blue LED under the D sign is on when the repeater is communicating with the master software.

The latency of our 3G connection is quite high, but the voice communication remained perfect. WeвЂ™ve conducted the tests using a 3G internet connection with an 8 slot length jitter buffer.

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The result is 15-17 kbit/s for both up and download directions, so the bandwidth required is about 35 kbit/sec, if thereвЂ™s someone talking on one timeslot.

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WeвЂ™ve measured the bandwidth required for the repeater to communicate with the DMR master software to transfer one timeslot. IвЂ™ve translated my recent blogpost on ham-dmr.hu, so hereвЂ™s some info about the Hytera RD625 DMR repeater and about setting up VoIP communications. Most of the DMR protocolвЂ™s packets can be decoded and displayed in the log.

Most of the FEC algorithms are used not only for error checking but for error correction too.

This echo test SMS gets sent also after a normal DMRplus echo test sent to TS2/9990. After the echo test ends, dmrshark will send you back your average RSSI and RMS volume values during the echo test.

Echo service is available on 7777, in both timeslots and both private and group calls.

DMR data ack is sent after a successful GPS position packet has been decoded, so the transceivers wonвЂ™t send duplicate position packets unnecessarily. Both time and button triggered Hytera GPS position packets can be decoded.

GPS position decoding and sending to the APRS network.

APRS message sending/receiving to and from APRS-IS.

If you send a message to 7777 with the first word being a callsign and the rest are the message, it will be sent to the APRS-IS system as an APRS message.

If you send the word вЂњinfoвЂќ to 7777 with a callsign or DMR ID as the second word, it will give you info back about the given callsign/ID from the callsign book database.

If you send the word вЂњpingвЂќ to 7777, it will answer with вЂњpongвЂќ.

If the first word of a message to 7777 is an email address, and the other words are the message, dmrshark will send the message as an email to the given destination address.

If you send the message вЂњhelpвЂќ (without quotation marks) to dmrsharkвЂ™s DMR ID (7777), you can get the supported command list in SMS.

If you send an SMS from a Hytera transceiver to a Motorola (or Chinese one), dmrshark detects that the message send was unsuccessful and retries sending your message in the opposite (in this case, Motorola) format.

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Data packet sending and receiving with full FEC encoding/decoding and selective retransmission.

Both Hytera and Motorola formats are supported.

DMR messages can be sent from an external SQL database table (see the Hungarian live status page).

Live streaming via WebSockets or HTTP are now supported.

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Recorded files of the Hungarian network can be downloaded from the archive page.

dmrshark can record decoded voice data to.

Several new columns added to the repeater table.

ThereвЂ™s a circle which varies itвЂ™s color according to the volume and helps setting the correct mic gain.

dmrshark decodes voice calls and calculates their current and average RMS volumes.

The info column shows decoded SMS messages and GPS coordinates.

Most of the improvements can be seen online at the Hungarian networkвЂ™s live status page, or you can check the projectвЂ™s GitHub page. IвЂ™ve been working on dmrshark in the past few months.