Open House h638 Guia De Especificação

creates a home network between up to 

eight computers. “Plug and play” installation is easy when using the H628 data 

hub. The H638 is IEEE 802.3u 
100 Base-TX 

Fast 

Ethernet 

compliant, IEEE 802.3 10 Base-T 
compliant and has activity LEDs 
for network status and diagnosis. 
The H638 shares an MDI “uplink” 
port with Port 1 to expand the 
network using additional H638 
units for systems with more than 
eight devices.

Wiring the H638 Switch
•  Use only Category 5e unshielded twisted-pair cable for maximum 

performance.

•  When connecting to an H628 or a network device directly, 

use straight through or crossover RJ-45 cables. All ports will 
automatically detect the cable type.

•  Each run to a network device should be less than 100 meters 

(328 feet).

LED Indicators
•  ACTIVE lights are on when a network device is connected and 

fl ash when data is transmitted or received. The lights are off when 
a port is not connected.

•  FULL DUPLEX lights are on when a port is in full duplex mode. 

The lights are off when a port is in half duplex mode and fl ash 
when a collision occurs. Although some collisions are normal, too 
many collisions may indicate a problem such as a faulty cable or 
connection.

•  100 MBPS lights are on when a port is in 100 Mbps mode. The 

lights are off when the port is in 10 Mbps mode.

IEEE 802.3u
IEEE 802.3

100 Base-TX, 10 Base-T

and N-way auto-negotiation

RJ-45 ports

8

RJ-45 MDI uplink

Port 1

CAT-5e (UTP)

100 meters (328 feet)

each port

ACTIVE, 100 MBPS, FULL DUPLEX

operating temperature

0°C to 55°C

output current

800mA maximum

output voltage

5 VDC

input power

120 VAC

®

8 Port 10/100 Ethernet Switch

ChannelPlus model H638

Use one of the ports on the fi rst H638 and connect to the 
expansion H638 using its MDI “uplink” Port 1. See below for special 
instructions.

Using more than one switch
•  Use only Category 5e unshielded twisted-pair cable for maximum 

performance.

•  When connecting two switches, use a straight through or 

crossover RJ-45 Category 5e cable. Category 5 patch cords may 
be used for short interconnections.

•  The cable length between any two switches cannot exceed 100 

meters (328 feet).

•  Additional switches may be used as long as the path between 

any two network devices does not exceed four switches and fi ve 
cables.

•  All switches used must be powered.

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.  OPERATION IS 
SUBJECT TO THE FOLLOWING TWO CONDITIONS:  (1) THIS DEVICE MAY NOT 
CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY 
INTERFERENCE RECEIVED, INCLUDING  INTERFERENCE THAT MAY CAUSE 
UNDESIRED OPERATION.
This equipment has been tested and found to comply with the limits for a Class B digital 
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable 
protection against harmful interference in a residential installation. This equipment generates, 
uses, and can radiate radio frequency energy and, if not installed and used according to 
the instructions, may cause harmful interference to radio communications. However, there 
is no guarantee that interference will not occur in a particular installation. If this equipment 
does cause harmful interference to radio or television reception, which if found by turning 
the equipment off and on, the user is encouraged to try to correct the interference by one or 
more of the following measures:

•  Reorient or relocate the receiving antenna.
•  Increase the separation between the equipment and receiver.
•  Connect the equipment to an outlet other than the receiver’s outlet.
•  Consult a dealer or an experienced radio/TV technician for assistance.

INSTR,INSTL,H638 - LINEAR P/N: 222317 A - INK: PROCESS COLOR - MATERIAL: 113 GSM WHITE COATED - SIZE: 11.000” X 15.000” - SCALE: 1-1 - FOLDING: 2-FOLD ALTERNATE, 2-FOLD HORIZONTAL INTO THIRDS (FINISH HAS LOGOS SHOWING) - SIDE 1 OF 2