In our experience with a dozen systems in real world huge events, DD mode is very frustrating to set up, but has remarkable real world performance.? It is a simple Ethernet encapsulated in callsigns.? But it is not plug and play. ??We use dedicated “lab” laptops all stripped down as most security measures will stop the packet flow unless you add these on after it is working J

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A furious blinking of lights and flashing of callsigns (esp. the repeater call sign) on the ID-1 is a good indication, is it usually indicates you have an RF path.? Bad RF hardware (connectors, and those tall consumer grade antennas with the plastic joints) are an extremely common failure mode.? Assume they are bad at all times unless actually tested with a SWR bridge.? They last 2-3 years on commercial sites max.?

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PC – To start with, strip everything down to basics.? Static IP.? Same subnet (but not the same address) and mask as the repeater.? Check your call signs and RPT1, RPT2 etc. settings.? Some of these are case sensitive and character position sensitive.?? No firewall(s). ?NO DHCP. ?Straight piece of wire to the ID-1- no NAT firewalls, routers, hubs, VLANs etc.? No 802.1Q.?? No other traffic on the link or it will saturate.? Turn off ALL other interfaces on the PC- Internet, wireless etc. ??Then reboot the PC to clear the routing tables.? ?I have seen it work with and without a default gateway on the ID-1 interface – but do not have one up to the Internet.?? Double check your settings on ipconfig.? It is interesting when there is a good RF path and the ID-1 can “see” the other end, then and only then does layer 2 come up- all the arps etc.? Usually it is better to just ping the radio, vs devices behind it.?

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