4. LED Description
5. Technical Specifications
Standards
IEEE 802.3 & IEEE 802.3u
Switching Mechanism
Store & Forward
MAC table
1K Entries
Forward & Filter Rate
10Base-T 14,800 pps
(64 Bytes)
100Base-TX 148,800 pps
LED
Power, FDX, TP 100, TP Link/Act,
Fiber 100, Fiber Link/Act
Power
DC 5V, 1.6A
Power Consumption
5W
Weight
0.6 Kg
Dimensions
26 X 71 X 94mm
Temperature
Operating: 0 ~ 50
o
C
Storage: -20 ~ 60
o
C
Humidity
5% ~ 90% RH
Safety
UL, CSA
Emission
FCC/CE Class B
UTP
Cat. 5 UTP cable
Fiber
50/125, 62.5/125, or 100/140
µ
m multimode
8.3/125, 8.7/125, 9/125 or 10/125
µ
m single-mode
6. Rear Panel DIP Switch
Pin 1 Off/On TP Auto-negotiation Enable/Disable
Pin 2 Off/On TP Speed 100M/10M
Pin 3 Off/On TP Duplex Full / Half
Pin 4 Off/On Link-Cross-Check Disable/Enable
Default set OFF from PIN 1 to PIN 4
Please Note - Power-On reset must be performed
after changing the Dip Switch setting.
7. Link-Cross-Check
Link-Cross-Check allow user easily to identify and
diagnose the linking status. If set Link-Cross-Check switch
to Enable, UTP and Fiber port can link up only when both
linking conditions are good. In addition, if any of the fiber or
UTP port link down during operation, the other port will
also turn down link to alert the user and avoid packet loss.
Set Link-Cross-Check switch to Enable provide user
transparent link indication between two network devices
interconnected by GC-H21.
If Disable the Link-Cross-Check, the UTP and fiber port
will link up base on their individual linking condition.
Further, if fiber port link down during operation, it will not
turn down the UTP port link and vice versa.
8. Pure Converter Mode
This converter can also set to operate as a pure converter
without switching function by applying the following
settings:
Connecting to a 100Mbps Full Duplex:
Link-Cross-Check Enable (Pin 4 On)
TP Speed to 100Mbps (Pin 2 Off)
TP Duplex to Full (Pin 3 Off)
Connecting to a 100Mbps Half Duplex:
Link-Cross-Check Enable (Pin 4 On)
TP Speed to 100Mbps (Pin 2 Off)
TP Duplex to Half (Pin 3 On)
Ordering Information
Multi-mode
GC-H21SC:
SC/1310nm/2Km
GC-H21ST:
ST/1310nm/2Km
GC-H21MR: MT-RJ/1310nm/2Km
Single-mode
GC-H21SCS: SC/1310nm/10Km
GC-H21
Fast Ethernet
Switching Converter
User’s Guide
V 2.4
LED
Color
Function
PWR
Green Lit when power is available
FX 100
Green Lit when FX port speed is 100M
FX Link/ACT Green
Blink
Lit when fiber link is up
Blink when traffic present
FDX Green
Lit
when TP port Full Duplex Mode
is enabled
TX 100
Green Lit when TP port speed is 100M
TX Link/ACT Green
Blink
Lit when TP link is up
Blink when traffic present
