GarrettCom - Garrett Communications Door 6K16 Manual De Usuario

Magnum 6K16-Series Managed Fiber Switch Installation and User Guide (04/06) 

 

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One frequently-used application for the Managed Magnum 6K16-Series Switch 

copper ports is to connect one of them using a fiber media converter to another Switch in 

the network backbone, or to some other remote 100Mb device.  In this case, it is 

desirable to operate the fiber link at 100Mb speed, and at either half- or full duplex mode 

depending on the capabilities of the remote device.  Standard commercially available 

Fast Ethernet media converters mostly do not support auto-negotiation properly, and 

require that the switched port to which they are connected be at 100Mb fixed speed.  

Attachment to 10/100 auto-negotiation ports typically will not work properly.  The 

6K16-Series Switch’s RJ-45 ports handle this situation by configuring the ports as per 

desire through MNS software port settings and can check the port status of each port 

after the change. 

When Magnum 6K16-Series RJ-45 copper ports are set for auto-negotiation 

and are connected to another auto-negotiating device, there are 4 different speed and F/H 

modes possible depending on what the other device supports.  These are: (1) 100Mb full-

duplex, (2) 100Mb half-duplex, (3) 10 Mb full-duplex and (4) 10 Mb half-duplex. 

The auto-negotiation logic will attempt to operate in descending order and will normally 

arrive at the highest order mode that both devices can support at that time. (Since auto-

negotiation is potentially an externally controlled process, the original “highest order 

mode” result can change at any time depending on network changes that may occur).  If 

the device at the other end is not an auto-negotiating device, the 6K16-Series’s RJ-45 

ports will try to detect its idle signal to determine 10 or 100 speed, and will default to 

half-duplex  at that speed per the IEEE standard. 

 

 

    General information - 

 -- the devices at both ends of the cable are capable of operation at either 10 

Mb or 100Mb speed and/or in full- or half-duplex mode, and can 

send/receive auto-negotiation pulses, and . . .  

 --  the second of the two connected devices is powered up*, i.e., when 

LINK is established for a port, or 

--   the LINK is re-established on a port after being lost temporarily.