JPH0361734U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a block diagram showing how the device of this embodiment is connected to the network, Figure 3 is a waveform diagram of the main parts of the signals in Figure 1, and Figure 4 is the processing of the control/arithmetic circuit in Figure 1. FIG. 5 is an external view of the simple network status monitoring device of this embodiment, and FIG. 6 is a diagram showing the frame structure at the data link layer level. 10...transceiver interface circuit,
15...Timer/counter circuit, 22...Status display circuit, 23...Control/arithmetic circuit, 30...Simple network status monitoring device.

Claims (1)

[Claims for Utility Model Registration] A simple network status monitoring device connected to a network via a transceiver, which generates a carrier detection signal and a collision detection signal from signals sent via the transceiver. means, a carrier counter and a carrier timer which receive the carrier detection signal and the collision detection signal and measure the number of occurrences of the carrier and the period of occurrence of the carrier, respectively; a collision counter and a collision timer that respectively measure the occurrence period of the collision; at least the measured values of the carrier counter and the collision counter are expressed in decimal notation per unit time, and the values are calculated based on the measured values of the carrier timer and the collision timer. What is claimed is: 1. A simple network status monitoring device characterized in that it is portable and includes a status display unit that displays the line usage rate and collision frequency in decimal notation.