This document is a hardware installation manual for NetHammer M121&M128&M121-VPN&M128-VPN routers, which mainly introduces the hardware installation, connection and configuration of the routers.
This manual provides a complete overview of the NetHammer M121, M128, M121‑VPN and M128‑VPN network appliances, including hardware description, supported interface cards and system architecture. It details the physical specifications, power requirements and memory configuration of each model.
The guide walks through step‑by‑step installation procedures, hardware configuration, VLAN and FDB management, and command‑line configuration of interfaces such as Ethernet, ISDN, serial, analog and ADSL modules. It also includes troubleshooting commands and system management utilities.