CTC Union FTH4-1000MS, User Manual

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3.5.4 Port Configuration
This screen is for the configuration of the electrical Ethernet port (TP) and the optical port (FX).
Both the TP and FX Port Active are enabled by default. If a port is disabled, all transmission through this port will be stopped. The device
’s
LAN or Fiber Link LED will be extinguished if the port is made inactive. However, any connected device will still detect an Ethernet link.
The UTP port
Mode supports auto- negotiation per IEEE802.3u as well as manual forced mode setting of Speed and Duplex (Half/Full). In
802.3u, speed can be auto detected, however the Duplex mode MUST be negotiated. When an 802.3u compliant device is configured in auto
negotiation mode, failure to negotiate Duplex (for example, if connected to legacy equipment or to equipment configured in forced mode) will
result in the Auto device assuming a Half-Duplex operating mode. Do not connect forced Full mode Ethernet ports to an auto device as this
will result in a Duplex-Mismatch.
The Gigabit
Media Converter’s FX port will be able to auto detect speed (100M/1000M for Gigabit media converter; 100M for Fast Ethernet
media converter) although there is no standard for fiber speed and duplex negotiation. Therefore, it is important that at least one device on the
fiber link be manually configured for speed. In the example here, the device is manually configured for fiber speed of 100M.
Ethernet
Flow Control (IEEE802.3X) is a mechanism for temporarily stopping the transmission of data on Ethernet family computer
networks. It can work in conjunction with rate limiting to avoid dropped packets from TCP. Flow control should also be used with care and with
full knowledge of its effect when used to pause traffic coming from a switch.
The
rate limiting is adjustable for both ingress (packets received into the TP or FX port) and egress (packets transmitted from the TP or
FX port) in granularity of 64k. By default, rate limiting is disabled. Once enabled, the rate limit can be set in nx64k rates where n=1 to 16000.
Entering an “n” value of zero (0) will again disable the rate limiting.