The cable is like the cable in the picture:
FTP CAT 5E
The switch is Cisco 2960 Poe with fast ethernet interfaces.
The end device is Teletonika 3G router RUT230.
The speed hm I forgot to try to set the different speeds.
The port of cisco switch is Fast Ethernet.
The lan port of Teletonika 3G router RUT230 is with these parameters:
1 x LAN port, 10/100 Mbps, comply IEEE 802.3, IEEE 802.3u standards, supports auto MDI/MDIX.
I am not sure what is wrong,
The cable is okay I tested it with fluke.
I crimped two sides of the cable with standard B.
And I tested the cable with wire map testing.
And everyting is okay with wire map tests.
I start to think about the cable cat 5E is the problem.
Because this cable travels 100 metres with more other network cables before reach the telecomunication room, before reach the Cisco switch.
If Layer 1makes problems then I can't see mac address in layer 2 and Ip address in layer 3 right?
But the port of Cisco switch is up and link is up and status is connected?