Sujoy's Tech Blog: ISDN PRI Troubleshooting and RJ-48 Ethernet Loopback Test on Cisco Router_Primary Rate Interface Problem Fixed_NetworkingTelecom Field Engineer Guide
WLAN-Router Test: Die besten WLAN-Router 2023
AVM FRITZ! Box 7590 WLAN AC + N router (DSL/VDSL, 1.733 Mbit/s (5GHz) & 800 Mbit/s (2.4 GHz), up to 300 Mbit/s with VDSL supervectoring 35b, WiFi Mesh, DECT base, Media Server):
ISDN Ethernet Router with S/T Interface with Built-in 6-port 10Mbps Hub - TRENDnet TW-H6W1IR