hermesTRX and MOTOTRBO Enhanced GPS Revert Channel
What is Enhanced GPS? Data transmission on a MOTOTRBO Enhanced GPS slot is managed by the repeater (additional software option!). The repeater assigns transmission slots to the subscribers (transmission slot = window). The size of a window depends on the requested GPS information (latitude+longitued, speed, direction, etc). 5 is the smallest possible size window size. Within a data frame (30 seconds) and the smallest window size of 5 you can have a maximum of 100 transmission windows. The number of windows within a data frame gets smaller as...
read moreHow configure hermesTRX for remote access from the Internet
1. get an DYNDNS account (http://www.dyndns.org) to have a fixed name if you have a dial-in internet connection with dynamic IP addresses 2. configure the DYNDNS account on the router and adjust the firewall/NAT to forward port 80 to hermesTRX’ IP address 3. put the DYNDNS name or the the fixed public IP address into the “Domain” field on the Administration>Network page of hermesTRX 4. make sure all other internal users (PC) resolve the DYNDNS with the internal IP address of hermesTRX
read moreHow to prevent extra copies of hermesTRX in Google Earth
By clicking “Start Google Earth” on the hermesTRX interface, a new KML file will be generated by hermesTRX. The PC usually loads this file directly into Google Earth. This KML file is then stored temporarily into the “TEMP” folder in Google Earth. So far so good. When Google Earth is being closed (program end), Google Earth ask if the new loaded KML file inside the TEMP folder should be stored into the “My Places” folder. By clicking “yes”, the hermesTRX KML reference files is saved permanently...
read moreIP Site connect with Local Area Channels
For example, you have 5 repeaters and all 5 have SLOT 1 configured as a Wide Area Channel. That means that each SLOT 1 on each repeater is merged to ONE SINGLE CHANNEL. So voice and data may be exchanged through this Wide Area Channel using the IP connection between the repeaters. Each second SLOT on each repeaters is configured to a Local Area Channel. Meaning, voice and data will not be forwarded or exchanged to the other repeaters. When a radio is switched on, it sends an ARS (Automatic Registration Service) registration message to the...
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