GarrettCom P80F Manual De Usuario

Magnum P80F & P80C Personal Switches                      Installation and User Guide (07/03)

 

 

 

 

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processing resumes.  This flow-control sequence occurs in a small fraction of a second and is 

transparent to an observer.  See Section 4.6 for additional details. 

 

Another feature implemented in Magnum P80 & P80F Personal Switches is a 

collision-based flow-control mechanism (when operating at half-duplex only). When the Switch 

detects that its free buffer queue space is low, the Switch prevents more frames from entering by 

forcing a collision signal on all receiving half-duplex ports in order to stop incoming traffic. 

 

The latency (the time the frame spends in the Switch before it is sent along or 

forwarded to its destination) of the P80 & P80F Personal  Switches varies with the port-speed 

types, and the length of the frame is a variable here as it is with all store-and-forward switches.  

For 10 Mb-to-10 Mb or 10 Mb-to-100Mb or 100Mb-to-10 Mb forwarding, the latency is 15 

microseconds plus the packet time at 10 Mb.  For 100Mb-to-100Mb forwarding, the latency is 5 

microseconds plus the packet time at 100Mb. 

„  100Mb switching services for high performance Ethernet LANs 

Magnum P80 & P80F Switches provide Fast Ethernet switching on all ports.  

They perform high speed filter/forward operations on the traffic, giving each 

port’s segment a full 100Mb (or 10 Mb) of bandwidth.  

„  Option for one “future-proof” fiber ports connector, Model P80F 

 

Built-in fiber ports may be ordered with 100Mb full-duplex mm ST, SC, MTRJ 

and single-mode SC, SSCL-type connectors.  The fiber port can be set as full or 

half-duplex mode by a manual switch selection.  No Media Converter needed. 

 

„  Model P80C with all RJ-45 (copper) ports  

RJ-45 ports provide twisted pair segment connections, with N-way auto-

negotiation to all the ports. All RJ-45 ports are capable of half- or full-duplex. 

„  Top-mounted LEDs for convenient viewing 

 

The LEDs that indicate operating status are on the top of the unit for easy viewing 

in any situation.  For the difficult near-the-floor mounting locations that are 

convenient for keeping the cables out of the way, the LEDs are still easily 

viewed.