NBDMR Repeater Group - TG 3029 YSF 53710

Inside look at IPSC2

Today we are taking a bit of a deeper look into how IPSC2 works. IPSC2 allows many different IP connections, it accepts the following types of connections:
– Hotspots
– Motorola Repeaters (Master and Peers)
– Hytera Repeaters
– cBridge CC-CC links
– XLX Reflectors
– OpenBridge (for interfacing to Brandmeister)
– Interlink (to interface to other IPSC2 servers)

Typically in our current configuration, its only Hotspot and cBridge CC links that are used. This software is linux based and our installation is operating from the same data center the Canadian cBridge does in Covey Hill, Quebec.

Lets look at the dashboard that’s available online at ipsc2.can-trbo.ca
This simple web interface displays all the connected stations, their talkgroup routing, and any active network traffic. There are no configurable settings in the dashboard, it just displays what the program is doing.

We are often asked what does this number or that number mean on the dashboard. If you refer to the image above we can see the following (click the photo to enlarge)

1- Anything in this top section of the main status page indicates active network traffic, in this case VE1RMJ is actively transmitting on TG3029.

2- The mysterious number beside your location that seems to randomly fluctuate, this is actually the Keep Alive Timer. Any hotspots or network connections have a 30 second keep alive timer, where UDP packets are sent back and forth to verify the device is still connected. It will start at 30 and count down, usually not going below 20, when the packet is received, it resets to 30. If no keep alive packet is received for 30 seconds IPSC2 declares the device disconnected and removes it from the dashboard.

3- If you see a number in brackets in the TS1 column beside a talkgroup number this indicates the talkgroup is not set as static and the user has PTT activated it. It will count down from 10 minutes, if there is no further local RF activity on the talkgroup it will disconnect.

4- The talkgroups entered in the TS1 and TS2 columns here indicate the user has set them as static talkgroups in their hotspot. In this example 302 Canada Wide is static on TS1, and Ontario, BC, NB, and New England are static on TS2.

5- Occasionally you may see a talkgroup in red, this happen on non-duplex hotspots operating in DMO mode when it receives traffic for one timeslot when the other is already in transmit. It is first come first serve with no priority available.

At the bottom of the status page in the list of connections will be the network connections that direct the inbound and outbound traffic to other networks. In the above photo you can see the YSF2DMR gateway that links our YSF Reflector “CA Maritimes” to TG3029. Below that are CC-CC (Control Center to Control Center) links that interface with cBridges. Currently there are 3 cBridges connected, Can-Trbo for the Canadian talkgroups and two New England cBridges for New England Wide and the New England Statewides we carry.

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