Funk-Electronic Piciorgros GmbH
TGW-100/TGW-100R
V2.71 - Page 49 of 59
4.2
Serial Protocols (RS-232 or RS-485/RS-422)
When setting the TGW as a master unit, it is useful to know what communication
protocol is used. Regarding that, the TGW-100 knows, where inside the data stream the
address byte(s) is (are) located. With that knowledge, the TGW extracts this “logical
address byte” and using the predefined address translation (or routing) table, it can
convert the protocol address into the destination ISSI of the Tetra target device.
Using that technology, in comparison to GISSI (group transmission) the load of the
Tetra network can be reduced enormously.
The outstation devices do not need any routing or address translation table. As these
units usually are used as “polled devices”, they just answer to the polling request ISSI.
The following protocols are supported by the TGW-100
