Modules
for
DHR-800 / DHR-800P
Installation Guide
DHR-8TP / DHR-BRG /DHR-4ST
DHR-4SC / DHR-1 ST / DHR-1SC
1. Hardware Description
The following sections describe the hardware function, and usage of the four
different modules
1. 8-Port 10/100Base-TX Dual-Speed Module
DHR-8TP
LINK ACT LINK ACT LINK ACT LINK ACT LINK ACT LINK ACT LINK ACT LINK ACT
1 2 3 4 5 6 7 8
The front panel of DHR-8TP
This module provides two different running speed – 10Mbps and 100Mbps and
automatically distinguish the speed of incoming connection and group the same
speed of ports in same network segment, i.e., each port has auto-negotiation Nway
function.
The following sections describe the function of LEDs on the front panel of module.
Port’s Link/Act
Color: Green
Label: Link/Act
Function: Each RJ45 station port on the module is assigned two LEDs for
monitoring port “Good Link” and data traffic. The LEDs are normally “Off” after
the power on operation. The left LED will light up steadily to show “Good Link”
when port is been connected. The right LED will flash rapidly to show data passing
in and out the port.
Port’s Speed
Color: Yellow
Label: 100Mbps
Function: Each RJ45 station port on the hub is assigned an LED on the main panel
of the hub (DHR-800/DHR-800P) following to the slot installed (i.e. slot1, slot2) to
indicate the running speed. The LED is normally in state of “On-Off-On-Off…” at
fixed frequency after power on operation. It means the station port is sensing the
incoming connection will be 100Mbps or 10Mbps device. If the connection is
2
running at 100Mbps, the LED will keep “On”, otherwise, keep “Off” when it is at
10Mbps state. The speed LEDs of module are located at the left side of main panel
of the DHR-800 series labeled with “Slot1” or “Slot2”.
Station Ports
There are 8 RJ-45 jacks on the front panel of the module. Each jack is (MDI-X)
labeled with a port number. All ports' transmit and receive lines are crossed within
the hub. A 10/100Base-TX port must be internally cross-wired to let you connect an
end node using straight-wired cabling.
2. 3-Port 10/100Base-TX Dual-Speed and 1 port
100Base-FX Optic Fiber Module
DHR-1SC/DHR-1ST
LINK
ACT
10/100Base-FX
TX RX
LINK ACT LINK ACT LINK ACT
1 2 3
The front panel of DHR-1 ST/DHR-1SC
This module provides two different media – twisted-pair wire and optic fiber. The
TP ports have the same functions as described in above section. The optic fiber port
lets user has the choice to link this hub to optic fiber environment. There are two
kinds of connector -- ST or SC types. This port is running in 100Mbps and half
duplex mode only. The connection rule and limitation are same as normal optic
fiber class II repeater.
The function of LEDs of TP ports and FX port are same as DHR-8TP, 8 port TP
module – Link and Activity. There are only four speed LEDs will display on the
main panel of the hub (DHR-800/DHR800P) – TP ports’ function is same as 8 port
module, and FX port is always “On” because it is running at 100Mbps speed.
3. 3-Port 10/100Base-TX Dual-Speed and One
10/100Mbps port Bridging Module
DHR-BRG
LINK ACT LINK ACT LINK ACT
1 2 3
3
LINK
ACT
100Mbps
FDX
10/100Base-TX
Bridging
The front panel of DHR-BRG
This module provides one special port for extending the cable length to another hub
(10Base or 100Base hub) in 100 meters, this port is a switching port or called
“Bridging Port” .
The main hub basically is a Class II hub, it means the cable length between two
100Base hubs through “Uplink” port is only 5 meters. It is the limitation of
100Base-TX Class II hub. This module not only provide the ability to extending the
cable length, but also the all functions of bridging hub – address learning and
filtering, error packet filtering, store-and-forwarding, CRC checking, separating
collision domain, etc. Another feature is the cabling behavior is similar to 10Base-T
network.
The function of the other 3 ports is same as 8 port dual-speed TP module.
The operating method of extending cable length in 100 meters is by driving one end
of 100 meters cable to extend port and the other end of cable to another hub’s
normal station port. Because the extending ports’ transmit and receive signals are
not cross over (MDI-II), therefore the cable between two hubs is straight-through
TP wires.
The functions of LEDs of extending port – Link, Activity, Speed, and Full Duplex.
4. 4-port 100Base-FX Optic Fiber Module
DHR-4SC/DHR-4ST
1
2
3
4
LINK ACT
1 2 3 4
TX RXTX RX TX RXTX RX
The front panel of DHR-4ST/DHR-4SC
This module provides 4 port SC or ST type optic fiber ports. All the functions are
same as the optic fiber port’s in “3 TP + 1 Optic Fiber” module. Please refer to the
section above, DHR-1 ST/DHR-1SC.
Notice that all four ports are running in 100Mbps and half duplex mode and four
speed LEDs will display on the main panel of the hub (DHR-800/DHR-800P).
4
2. Installation
111 meters (if with 5 meters cable
cascade with another class II hub)
1. Module installation
1. Turn main hub off.
2. Remove the “Blank” bracket with label – Expansion Slot
3. Lift the handles, and let both edges of PCB following the “Plastic Guide”
slide into the end of slot, then the surface of front panel of
module will fit into the slot exactly
4. Fasten the screws
5. Turn main hub on
2. Connection Guide
The maximum connection length allowed between two nodes:
Ports Cable Distance
10/100Base TX ports
(Station Port, MDI-X)
10/100Base-FX Multi-mode 62.5/125 fiber
10/100Base-TX Bridging
ports (MDI-II)
UTP or STP straight-through
cable
optic cable
UTP or STP straight-through
cable
5
100 meters to a PC
208 meters (stand alone)
100 meters to another hub
3. SPECIFICATION
DHR-4ST/SC
Model DHR-8TP DHR-BRG DHR-1SC/ST
Standard
Network
Standard
Connector
LED Indicators
Dimension
Temperature
Humidity
IEEE802.3/IEEE802.3u IEEE802.3u
100Base-TX: UTP/STP category 5 cable
10Base-T: UTP/STP category 3 or 5 cable
100Base-FX: Multi-mode 62.5/125 micron fiber optic cable
8 STP RJ-45
ports for
10/100Mbps
Link, Activity Link, Speed,
Operating: 0 to 50 degree C
Storage: 20 to 70 degree C
Operating: 10% to 90% RH
Storage: 10% to 90% RH
4 STP RJ-45
ports for
10/100Mbps
Activity, FDX
125mm (W) x138mm (L) x34mm (H)
3 STP RJ-45
ports for
10/100Mbps,
1 SC/ST optic
fiber connector
Link, Activity, Link, Activity
4 SC/ST optic
fiber connector
Input Power
Requirement
Registrations
EMDHR-M
6
5V, 1.5A max.
FCC Part 15 Class A, CE
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