
Hardware Installation and Reference Guide Product Overview
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1.4 Module
The RG-S7800C switch adopts the module-based design. Compliant with industry standards, the design divides modules
and integrates module interfaces to ensure the switch system's functioning and independence of various function
modules.
The modules of the RG-S7800C switch provide 10/100/1000M auto-sensing Ethernet copper ports, 1000 Mbps/100 Mbps
SFP (single-mode/multi-mode) optical fiber interfaces and 10G/40G optical fiber interfaces.
1.4.1 M7800C-CM
M7800C-CM is the supervisor module of the RG-S7808C series switches and is designed with management and
switching functions.
Module Appearance
Figure 1-16 Appearance of the M7800C-CM Module
External Port
The M7800C-CM module provides three external ports:
Universal Serial Bus (USB) port: By connecting to the USB port, the USB storage devices can store logs, host
version, alarms and other diagnosis information, facilitating online upgrade of switch software and storage of logs.
To secure data and prevent damage to the device, it is recommended to use high-quality flash disks produced by
reliable manufacturers. The USB port is compatible with most USB controllers but may be unable to identify some
USB disk models.
Console port: As a serial communications port, it uses the RS-232 interface level and standard RJ-45 connector.
This port is used to connect the device to serial ports of background terminal computers to perform tasks including
system commissioning, configuration, maintenance, management, and host software loading.
10/100/1000M MGMT port: As the 10/100/1000BASE-T Ethernet port, it uses the RJ-45 connector. This port can be
used to connect the device to the Ethernet port of the background computer to load programs. Use the standard
cable to connect the device to the Ethernet port of the background computer.
Button
The M7800C-CM module provides a Reset button, which is used to reset the system. If the button is held for less than five
seconds, it is a short press; if the button is held for five seconds or longer, it is a long press.
In case of a short press, the Status LED flashes in green, and the device resets within five seconds after the press. In
case of a long press, the Status LED flashes in green and then flashes in red; the device resets within five seconds
after the press.
Press the button, and the system starts to collect information, during which the device will not restart. After the
collection is complete, the device restarts automatically. Hold the button for a while and release it, the device restarts
automatically in five seconds.
LED
Identification
on the panel
The module is NOT receiving power.
Initialization is in progress. Continuous blinking indicates
errors.
The module is operational.
Primary/standby supervisor
module LED
The module acts as the standby supervisor module.
The module acts as the primary supervisor module.
The system fails, interrupting functioning of the whole
system or a module; the device may be damaged if it
continues operating.