Specifications

Summit WM series switch WM200/2000 Hardware maintenance
Summit WM Series WLAN Switch and Altitude Access Point Software Version 4.1 Technical Reference Guide
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The NP 4000 card has with the following main components:
● Network processor unit
● 256MB of RDRAM
● 32MB of QDR SSRAM
● Non-transparent PCI bridge (Intel 21555) to provide 33/66MHz 32/64-bit PCI bus connectivity
between NPU PCI interface and cPCI backplane
● 12-port SPI4.2 Gigabit Mac
● 4 x front-accessible Gigabit (data) ports
NOTE
Replacing the NP 4000 alters the MAC addresses of the system data ports. New MAC addresses are advertised
on the network in relation to the system interface IPs. You must ensure that no specific network topology is in
place which can be affected by the MAC address change to the network. The IP addresses for the system do not
change.
Power and maintenance procedures
This section provides procedures to power off and power on the system when performing maintenance.
Using the matrices will help to eliminate system problems.
Tools and equipment required
Use the following tools and equipment to power on the system and verify system power:
● ESD kit
● Phillips screwdriver
Maintaining the ESD wrist strap
The ESD wrist strap and cord must operate properly to guard against ESD damage and electrical
shocks. The wrist strap and cord assembly has a 1-megohm resistor; if the resistor fails, there is no ESD
protection.
NOTE
Check the wrist strap weekly to ensure proper ESD protection.
To test the ESD wrist strap using a DMM:
1 Set the ohmmeter to 2-megohm resistance (see Figure 15).
2 Connect the DMM black lead to the alligator clip at the end of the cord.
3 Contact the DMM red lead to the plate on the inner surface of the wrist strap.