Ethernet over VDSL2 Converter
DCE 2178HSEE / HSEE4
User’s Manual
FCC Warning
This equipment has been tested and found to comply with the
regulations for a Class A digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment
is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with this user’s guide, may
cause harmful interference to radio communications. Operation
of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct
the interference at his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this
product may cause radio interference, in which case the user
may be required to take adequate measures.
WEEE Warning
To avoid the potential effects on the environment and
human health as a result of the presence of
hazardous substances in electrical and electronic
equipment, end users of electrical and electronic
equipment should understand the meaning of the crossed-out
wheeled bin symbol. Do not dispose of WEEE as unsorted
municipal waste and have to collect such WEEE separately.
Revision
Ethernet over VDSL2 Converter User’s Manual
For Models: DCE 2178HSEE
Rev 1.0 (October, 2009)
Part No.: DCE 2178HSEE
Table Of Contents
1. Introduction .....................................................................5
1.1 Checklist ....
................................................................5
1.2 Introduction to Ethernet over VDSL2 Bridge ....
..............5
1.3 Key Features ....
..........................................................9
1.4 Specications ....
.......................................................10
2. Hardware Description ......................................................12
2
.1 Front Panel ....
........................................................... 12
2.1.1 LED indicators for DCE 2178HSEE.....................13
2.1.2 LED indicators for DCE 2178HSEE4...................14
2.2 The Rear Panel ......................................................... 16
2.2.1 MODE
DIP Switch ............................................. 16
2.2.2 DC po
wer jack .................................................18
3. Installing and Using VDSL Converter ...............................19
3
.1 Install the Ethernet Over VDSL2 Converter ....
.............19
3.1.1 2178HSEE / HSEE4 LAN to LAN connection ........20
3.1.2 2178HSEE / HSEE4 Connect to Multi-Port Master 21
3.2 Connecting DCE 2178HSEE / 2178HSEE4 ...................22
3.2.1 Connecting Standalone PC ................................22
3.2.2 Conne
cting Multiple PCs to an Ethernet LAN ....... 23
3.3 Chassis Installation and Rack Mounting (2178HSEE)....25
4. Power Information .......................................................... 26
5.
Troubleshooting ..............................................................27
6.
FAQ ...............................................................................28
5
1. Introduction
1.1 Checklist
Check the contents of your package for following parts:
DCE 2178HSEE / DCE 2178HSEE4
Splitter (2178HSEE only)
Power Adapter
RJ-11 Telephone line
User’s Manual
If any of these pieces are missing or damaged, please contact
your dealer immediately, if possible, retain the carton including
the original packing material, and use them against to repack
the product in case there is a need to return it to us for repair.
1.2 Introduction to Ethernet over VDSL2 Bridge
Data Connect's state-of-the-art ethernet-over-VDSL2 products are
based on two core networking technologies: Ethernet and
VDSL2 (Very-high-data-rate Digital Subscriber Line 2). This
technology offers the absolute fastest possible data transmission
speeds over existing copper telephone lines without the need for
rewiring.
The 2178HSEE & HSEE4 Ethernet over VDSL2 Converter / Bridge
has switching architecture with RJ-45 10/100Mbps Ethernet port
and one symmetric Ethernet over VDSL port (symmetry means
upstream and downstream rate are the same or similar) – the
VDSL port can beRJ-11connectors. The 2178HSEE & HSEE4 can
be set to CO mode or CPE mode via a DIP switch, when the
2178HSEE / HSEE4-COisusedto connecttotheother 2178HSEE /
HSEE4 CPE as a standalone pair, up to 100/100Mbps symmetric
data rate within 300m and up to 50/2Mbps asymmetric data
l
l
l
l
l
6
rate at 1.4km. This capability is ideal for use as an Ethernet
extender for your existing Ethernet network.
Data Connect's VDSL2 Converter solution provides a much cheaper
replacement and smooth migration for existing Long Reach
Ethernet (LRE) networks.
The cable specications of the connection are listed as following:
10Base-T, Category 3, 4 or 5 UTP
100Base-TX, Category 5 UTP
Ethernet over VDSL, Twisted-pair telephone wires
The two drawings listed below are typical application for the
Ethernet over VDSL2 Converter.
Note
Slave device (CPE) must connect to Master device
(CO) through the telephone wire. Slave cannot
connect to Slave and Master cannot connect to
Master. To definethe2178HSEE / HSEE4 to CO or
CPE, please refer to section 2.2.1 for more detail.
l
l
l
7
LAN to LAN Connection
Telephone wire
100Base-TX UTP
VDSL2
VDSL2
Ethernet Telephone Network
Main office/PBX,
Telco CO,
wire closet
VDSL2
Telephone wire
Up to 1.4km
VDSL2
Telephone wire
Ethernet over VDSL2 and Telephone Network
Main office/PBX,
Telco CO,
wire closet
LAN1
LAN2
DCE 2178HSEE4/CO DCE 2178HSEE4/CPE
Up to 1.4km
VDSL2
Telephone wire
Ethernet over VDSL2 and Telephone Network
Main office/PBX,
Telco CO,
wire closet
/$1
/$1
DCE 2178HSEE/CO DCE 2178HSEE/CPE
Splitter Splitter
8
Multi-LAN Connection
Telephone wire
100Base-TX UTP
VDSL2
VDSL2
UP to 1.4km
VDSL2
LAN2
Router
LAN1
Ethernet over VDSL2 and Telephone Network
Main office/PBX,
Telco CO,
wire closet
VDSL2 Switch
(Multi-port CO)
Internet
Telephone wire
DCE 2178HSEE4/CPE
DCE 2178HSEE4/CPE
UP to 1.4km
LAN2
Router
LAN1
Ethernet over VDSL2 and Telephone Network
Main office/PBX,
Telco CO,
wire closet
VDSL2 Switch
(Multi-port CO)
,QWHUQHW
Telephone wire
2178HSEE/CPE
2178HSEE/CPE
Splitter
Splitter
Ethernet Telephone Network
Main office/PBX,
Telco CO,
wire closet
Telephone wire
VDSL2
VDSL2
VDSL2
VDSL2
VDSL2
VDSL2
VDSL2
9
1.3 Key Features
The Ethernet over VDSL2 Converter provides the following key
features:
Cost-effective VDSL2 CO/CPE bridge solution
One box design, CO/CPE selectable via DIP Switch
Denes prole 17a band plan for the long distance transmis-
sion of upstream and downstream signals
Denes prole 30a band plan for the short distance transmis-
sion of upstream and downstream signals
Complies with IEEE 802.3, IEEE 802.3u and IEEE 802.3x
standards
DMT (Discrete Multi-Tone) line coding
Half duplex Back pressure and IEEE 802.3x Full Duplex Pause
frame ow control
Built-in POTS splitter to share voice and data (HSEE4 only)
Voice and data communication can be shared on the existing
telephone wire simultaneously
Hardware IGMP Snooping for Multimedia service (HSEE4 ONLY)
Support up to 1536 bytes packet size, 802.1Q VLAN tag
transparent
VDSL2 stand-alone transceiver for simple bridge modem appli-
cation
Selectable target prole and target SNR margin
Support extensive LED indicators for network diagnostics
l
l
l
l
l
l
l
l
l
l
l
l
l
l
10
1.4 Specications
Product 2178HSEE 2178HSEE4
Hardware Specication
Ports
10/100Base-TX
1 RJ-45, Auto-negotiation
and Auto-MDI/MDI-X
4 RJ-45, Auto-negotiation
and Auto-MDI/MDI-X
VDSL 1 RJ-11, female Phone Jack
PHONE
Additional Splitter for
POTS connection
1 RJ-11, Built-in splitters
for POTS connection
DIP Switch &
Functionality
4 position DIP switch
• CO / CPE mode select
• S
elect
able fast and interleaved mode
• Select
able target 17a / 30a proles
• Select
able target SNR mode
Encoding
• VDSL-D
MT
- ITU-T G.993.1 VDSL
- ITU-T G.997.1
- ITU-T G.993.2 VDSL2 (Prole 17a/30a Support)
LED Indicators
• One Power • One Power
• 3 for RJ-11/VDSL2: • 3 for RJ-11/VDSL2:
• 2 for per RJ-45
10/100Base-TX port
• 1 for per RJ-45
10/100Base-TX port
Cabling
Ethernet
• 1
0Base
-T: 2-pair UTP Cat.3,4,5 up to 100m (328ft)
• 100Base-TX: 2-pair UTP Cat.5, up to 100m (328ft)
VDSL
Twisted-pair telephone wires (AWG24 or better) up
to 1.4km
Performance*
(Down Stream /
Up Stream)
17a prole
300m -> 86/65Mbps
400m -> 86/52Mbps
600m -> 81/36Mbps
800m -> 72/19Mbps
1000m -> 60/9Mbps
1200m -> 59/6Mbps
1400m -> 50/2Mbps
300m -> 99/70Mbps
400m -> 99/60Mbps
600m -> 90/45Mbps
800m -> 50/28Mbps
1000m -> 40/12Mbps
1200m -> 20/7Mbps
1400m -> 20/4Mbps
11
30a prole
300m -> 100/100Mbps
400m -> 90/90Mbps
600m -> 61/40Mbps
800m -> 54/8Mbps
300m -> 100/100Mbps
400m -> 90/90Mbps
600m -> 69/55Mbps
800m -> 48/9Mbps
Power Requirement 5V DC, 2A
Dimension (W x D x H) 97 x 70 x 26 mm 155 x 86 x 26 mm
Weight 199g 368g
Operating Temperature 0~50ºC
Storage Temperature -25~70ºC
Operating Humidity 10% to 90%, relative humidity, non-condensing
Storage Humidity 10% to 90%, relative humidity, non-condensing
Switch Specication
Switch Processing
Scheme
Store-and-Forward
Address Table 1K entries 2K entries
Flow Control
Back pressure for half duplex
IEEE 802.3x Pause Frame for full duplex
Switch fabric 0.2Gbps 0.8Gbps
Throughput
(packet per second)
0.14Mpps 0.59Mpps
Network cables
10/100Base-TX:
2-Pair UTP Cat. 3,4, 5 (100meters, max.)
EIA / TIA-568 100-ohm STP (100meters, max.)
Standard Conformance
Regulation Compliance FCC Part 15 Class A, CE
Standards Compliance
IEEE 802.3 10Base-T
IEEE 802.3u 100Base-TX
ITU-T
● G
.993
.1 (VDSL)
● G.997.1
● G.993.2 VDSL2 (Prole 17a/30a)
* The performance data above is for reference only, the actual
data rate will vary on the quality of the copper wire and environment factors.
12
2. Hardware Description
The 2178HSEE provides 1 RJ-11 port for VDSL2 connection, for
both VDSL2 connection and voice connection service operate at
the same time. The additionalsplitterfrompackageof 2178HSEE
can help 2178HSEE work in this way easily.
The2178HSEE4 provides 2 RJ-11 ports for voice connection (like
telephone) and for network line connection.
The2178HSEE provide1 RJ-45portand2178 HSEE4 provide4 RJ-45
ports for two different running speed –10Mbps, 100Mbps, in the
same converter / bridge and automatically distinguish the speed
of incoming connection.
This section describes the hardware features of the Ethernet
over VDSL2 Converter / Bridge. For easier control of the
converter / Bridge, familiarize yourself with its display indicators,
and ports. Front panel illustrations in this chapter display the
unit LED indicators. Before connecting any network device to the
converter / Bridge, read this chapter carefully.
2.1 Front Panel
The units’ front panel provides a simple interface monitoring the
Ethernet over VDSL2 Converter.
n DCE 2178HSEE Front Panel
Figure 2-1: '&(+6(( front panel
13
n DCE 2178HSEE4 Front Panel
Figure 2-2: '&(+6(( front panel
2.1.1 LED indicators for DCE 2178HSEE
The rich diagnostic LEDs on the front panel can provide the
operating status of individual port and whole system.
n System
LED Color Function
PWR Green
Lit
Lights to indicate that the VDSL
Converter has power.
Off
Indicate that the VDSL Converter has no
power.
n VDSL
LED Color Function
VDSL Green
Lit
Indicate that the VDSL link is
established.
Fast
Blink
Indicate that the VDSL link is at training
status (about 10 seconds).
Slow
Blink
Indicate that the VDSL link is at idle
status.
CO Green Lit
Indicate the VDSL Converter is running
at CO mode.
CPE Green Lit
Indicate the VDSL Converter is running
at CPE mode.
14
n 10/100Base-TX Port
LED Color Function
LNK/
ACT
Green
Lit Indicate that the port is link up.
Blink
Indicate that the VDSL Converter is
actively sending or receiving data over
that port.
Off Indicate that the port is link down.
100 Green
Lit
Indicate that the port is operating at
100Mbps.
Off
Indicate that the port is link down or
10Mbps.
2.1.2 LED indicators for DCE 2178HSEE4
The rich diagnostic LEDs on the front panel can provide the
operating status of individual port and whole system.
n System
LED Color Function
PWR Green
Lit
Lights to indicate that the VDSL
Bridge has power.
Off
Indicate that the VDSL Bridge has
no power.
15
n VDSL
LED Color Function
VDSL Green
Lit
Indicate that the VDSL link is
established.
Fast
Blink
Indicate that the VDSL link is at training
status (about 10 seconds).
Slow
Blink
Indicate that the VDSL link is at idle
status.
CO Green Lit
Indicate the VDSL Bridge is running at
CO mode.
CPE Green Lit
Indicate the VDSL Bridge is running at
CPE mode.
n 10/100Base-TX Port
LED Color Function
LNK/
ACT
Green
Lit
Indicate that the port is link up at
10/100Mbps.
Blink
Indicate that the VDSL Bridge is actively
sending or receiving data over that
port.
Off Indicate that the port is link down.
16
2.2 The Rear Panel
The rear panel of the Ethernet over VDSL2 Converter is shown
as below.
n DCE 2178HSEE Rear Panel
1 2 3 4
Figure 2-3: '&(+6(( rear panel
n DCE 2178HSEE4 Rear Panel
1 2 3 4
Figure 2-4: '&(+6(( rear panel
2.2.1 MODE DIP Switch
The Ethernet over VDSL2 Converter provides 4 selective
transmission modes. By switching the transmission modes,
you can obtain a best transmission mode to suit with phone
line quality or distance of connectivity. The following is the
summary table of transmission setting, bandwidth and distance
extensibility tested for AWG 24 (0.5mm) twisted-pair without
noise and cross talk.
DIP-1 DIP-2 DIP-3 DIP-4
Mode Channel Prole SNR
OFF CO Interleave 17A 9dB
ON (default) CPE Fast 30A 6dB
17
n DIP-1: Mode (CO/CPE)
CO (Central Ofce) – the Master device mode, usually the CO
device will be located at the data center of ISP or enterprise
to link to the backbone.
CPE (Customer Premises Equipment) – the Slave device
mode, usually the CPE device will be located at branch ofce,
home or remote side as the long reach data receiver. The CPE
can be connecting to the PC, IP Camera or Wireless Access
Point or other network devices.
Note
When the Ethernet Over VDSL2 Converter operates at CPE mode, the DIP switch 2, 3, 4 is no
function.
n DIP-2: Channel (Fast and Interleave mode)
Fast mode guarantees a minimum end-to-end latency less
than 1 ms.
Interleaved mode provides impulse noises protection for any
impulse noise with a duration less than 250 us. Interleaved
mode has a maximum end to end latency of 10m sec.
n DIP-3: Prole (17A/30A)
User has the ability to select prole. When 30a is selected
that provides better downstream/upstream performance in
short distance, when 17a is selected that provides longer
distance link capability. Refer to section 1.4 specication for
details.
n DIP-4: SNR (9dB/6dB) Target SNR (Signal Noise Ratio)
Margin
When SNR margin is selected, the system provide 9dB/6dB
SNR margin for across all usable loop length.
l
l
l
l
l
l
18
Note
1. By default, the four DIP switch are at “ON”
position that will operate as “CPE”. For operate
as “CO”, please adjust the DIP 1 switch at
“OFF” position. Then adjust other DIP switch
accordingly to fulfill different network application demand.
2. Please power off the Ethernet over VDSL2
Converter, before making any transmission
mode adjustment.
2.2.2 DC power jack
2178HSEE / 2178HSEE4 require 5V DC 2A power input. It will
conform to the bundled AC adapter. Should you have the
issue to make the power connection, please contact your
local sales representative.
Note
1. The device is a power-required device, it
means, it will not work till it is powered. If
your networks should active all the time, please
consider using UPS (Uninterrupted Power
Supply) for your device. It will prevent you from
network data loss or network downtime.
2
. In so
me area, installing a surge suppression
device may also help to protect your Ethernet
Over VDSL2 Converter / Bridge from being
damaged by unregulated surge or current to
the Ethernet Over VDSL2 Converter / Bridge or
the power adapter.
19
3. Installing and Using VDSL Converter
3.1 Install the Ethernet Over VDSL2 Converter
The Ethernet over VDSL2 Converter / Bridge does not require
any software conguration. Users can immediately use any
feature of this product simply by attached the cables and plug
power on. There is some key limitation on the Ethernet over
VDSL2 Converter / Bridge. Please check the following items:
The device is used for Point-to-Point connection only (Master
device to Slave device) and allows data and voice work on
the same telephone lines.
2178HSEE provides one RJ-11 connector for VDSL port and
the port can build VDSL2 connection easily. For voice device
connection, the additional splitter from 2178HSEE package is
an idea choice.
2178 HSEE4 provides two RJ-11connectors for VDSL port. One
for voice device connection (like telephone) and the other one
for network link connection.
Depending on the quality of telephone line, the maximum
distance of one VDSL segment is 1.4km (4593ft) with AWG
24 telephone wires. The distance could vary by the quality of
telephone wires or the installed environment.
l
l
l
l
20
3.1.1 2178HSEE / 2178HSEE4 LAN to LAN connection
Two sets of the Ethernet over VDSL2 Converters / Bridge
could be used to link two local Area networks that are located
in different place. Through the normal telephone line, it could
setup a 100/100Mbps symmetric backbone, but one Ethernet
over VDSL2 Converters / Bridge must be Master (CO mode) and
the other one is Slave (CPE mode).
Telephone wire
100Base-TX UTP
VDSL2
VDSL2
Phone
VDSL2
2178HSEE/CO 2178HSEE
/CPE
Internet
PSTN
PBX
Up to 1.4km
Telephone wire
Router
Switch
Figure 3-1: +6(( LAN to LAN connection
Up to 1.4km
VDSL2
Telephone wire
Telephone wire
100Base-TX UTP
VDSL2
VDSL2
Internet
PSTN
Router
VDSL2 CO Bridge
VDSL2 CPE Bridge
PBX
Figure 3-2: +6(( LAN to LAN connection
21
3.1.2 2178HSEE / 2178HSEE4 Connect to Multi-Port Master
In order, to built up a local Internet in apartment, hotel and
campus and hospitality environment.
The Multi-port Master (for example, 5208-SW / 5224-SW VDSL2
Switch) need to be placed in the wiring center (MDF room) and
connect to the telephone line system, on the other hand, need
to install a Slave (2178HSEE / HSEE4) Converters / Bridge on
the individual client side and connect to the Multi-port Master
through the telephone lines.
When deciding where to put the converter then you must
ensure:
It is accessible and cables can be connected easily.
Cabling is away from sources of electrical noise such as
radios, transmitters and power lines and uorescent lighting
xtures.
Water or moisture can not enter the Converters / Bridge.
Air ow around the unit and through the vents in the side
of the case is not restricted (company recommend that you
provide a minimum of 25mm inch clearance).
To prolong the operational life of your units:
Do not place objects on top of any unit or stack.
l
l
l
l
l
22
3.2 Connecting 2178HSEE / 2178HSEE4
3.2.1 Connecting Standalone PC
Refer to the following procedures to setup the 2178HSEE
to a standalone PC.
1.
Setthe 2178HSEE to beCO mode or CPE modefromtheDIP
switch at the rear panel.
2.
Power on the 2178HSEE by connecting its power source.
3. Power LED will illuminate.
4. Use one RJ-11 wire and make a connection between 2178HSEE
and “Line” port of splitter from 2178HSEE package.
5.
Connect VDSL line from another VDSL device to DSL port of
the splitter that connects to 2178HSEE VDSL port.
6.
LNK LED will from blinking to illuminate.
7. Connect telephone to the PHONE port of the splitter that
connects to 2178HSEE VDSL port.
8.
Connect 2178HSEE Ethernet port to PC Network Interface Card
(NIC) via regular Cat. 5 cables.
Telephone wire
100Base-TX UTP
2178HSEE
Phone
RJ-11 Phone Jack
PC
Splitter
RJ-11 Line Cord
RJ-11 Line Cord
Phone
RJ-45 Cat.5
Twisted Pair Cable
VDSL
TP
Figure 3-3: Connecting Standalone PC
23
3.2.2 Connecting Multiple PCs to an Ethernet LAN
Refer to the following procedures to setup the 2178HSEE /
2178HSEE4 to an Ethernet LAN.
1.
Set the 2178HSEE / HSEE4 to be CO mode or CPE mode from
the DIP switch at the rear panel.
2.
Power on the 2178HSEE / HSEE4 by connecting its power
source.
3.
Power LED will illuminate.
4. Useone RJ-11wire and make a connection between 2178HSEE
and “Line” port of splitter from 2178HSEE package.
5.
Connect VDSL line from another VDSL device to DSL port of
the splitter that connects to 2178HSEE VDSL port.
6.
Connect VDSL line from another VDSL device to VDSL port of
the 2178HSEE4.
7.
LNK LED will illuminate.
8. Connect telephone to the PHONE port.
9. 2178HSEE:Connect Ethernet port to Ethernet Switch(or Broad
band Router)via regular Cat.5 cable. 2178HSEE4:Connect per
Ethernet port to each network device via regular Cat 5. cable
24
RJ-11 Line Cord
RJ-11 Line Cord
Phone
RJ-11 Phone Jack
RJ-45 Cat.5
Twisted Pair Cable
IP Cam
IP TV
Wireless
Switch
Laptop
PC
Telephone wire
100Base-TX UTP
2178HSEE4
Phone
RJ-11 Phone Jack
RJ-11 Phone Wire
IP Cam IP TV Wireless LaptopPC
1 2 3 4
RJ-11 Phone Wire
Telephone wire
100Base-TX UTP
Figure 3-4: Connecting Multiple PCs to an Ethernet LAN
Note
Please refer to your Ethernet device User’s Manual
for the device’s set up information.
25
3.3 Chassis Installation & Rack Mounting (2178HSEE)
To install the Ethernet over VDSL2 Converter in a 10-inch or 19inch Converter Chassis with standard rack, follow the instructions
described below.
Step 1: Place y
our 2178HSEE on a hard at surface, with the
front panel positioned towards your front side.
Step 2: C
areful
ly slide in the module until it is fully and rmly
tted into the slot of the converter chassis.
Figure 3-5: Insert a VDSL2 converter into an available slot
Step 3: Attach
a rack-mount bracket to each side of the
Converter Chassis with supplied screws attached to
the package.
Step 4: A
fter t
he brackets are attached to the Converter
Chassis, use suitable screws to securely attach the
brackets to the rack.
Step 5: C
onnect
one end of the power cable to the 10-inch or
19-inch Converter Chassis.
Step 6: C
onnect
the power plug of the power cable to a
standard wall outlet then power on the 10-inch or 19inch Converter Chassis, the PWR LED should light on.
Caution
You must use the screws supplied with the
mounting brackets. Damage caused to the parts
by using incorrect screws would invalidate your
warranty.
26
4. Power Information
The power jack of 2178HSEE / HSEE4 is with 2.5mm in the central
post and required +5VDC power input. It will conform to the
bundled AC-DC adapter and Planet’s Media Chassis. Should you
have the issue to make the power connection, please contact
your local sales representative.
Please keep the AC-DC adapter as spare parts when your
2178HSEE is installed to a Media Chassis.
2.5mm
DC Receptacle 2.5mm
+5V for each slot
DC receptacle is 2.5mm wide that conforms to and
matches the VDSL2 Converter 2.5mm DC jack’s central
post. Do not install any improper unit, model of the
Ethernet Over VDSL2 Converter.
27
5. Troubleshooting
SYMPTOM:
VDSL LNK LED does not light after wire is connected to the
VDSL port.
CHECKPOINT:
1.
Verify the length of the wire connected between two 2178HSEE
and 2178HSEE4 is not more than 1.4km. Please also try to adjust
the DIP switch or 2178HSEE / 2178HSEE4 to other SNR mode.
2.
Please note you must use one 2178HSEE / HSEE4 with CO
mode and the other 2178HSEE / HSEE4 with CPE mode, connect
to each other to make it work.
SYMPTOM:
TP LED does not light after cable is connected to the port.
CHECKPOINT:
1
.
Verify you are using the Cat.5 or better cable with RJ-45
connector to connect to the port.
2.
If your device (like LAN card) supports to Auto-Negotiation,
please try to manual set at a xed speed of your device to
solve this issue.
3.
The Converter / Bridge and the connected device’s power are
on or not.
4.
The port’s cable is rmly seated in its connectors in the switch
and in the associated device.
5.
The connecting cable is good and with correct type.
6. The connecting device, including any network adapter is func
-
tional.
28
6. FAQ
Q1: What voltage that 2178HSEE / HSEE4 used?
A1: 5V DC, 2A
Q2:
What is VDSL2?
A2: V
DSL2 (Very High-Bit-Rate Digital Subscriber Line 2),
G.993.2
is the newest and most advanced standard of
xDSL broadband wire line communications.
D
esigned
to support the wide deployment of Triple Play
services such as voice, data, high denition television
(HDTV) and interactive gaming, VDSL2 enable operators
and carrier to gradually, exibly, and cost efciently upgrade
exiting xDSL-infrastructure.
Q3: W
hat is the best distance for 2178HSEE / HSEE4?
A3:
In order to guarantee the stability and better quality of
network
, so we would suggest the distance in 1.4 kilometer
is the best for 2178HSEE / HSEE4.
Q4: What is the best date rate for 2178HSEE / HSEE4?
A4:
We provide the data rate of the 2178HSEE / HSEE4 is up
to 100M
bps/100Mbps (downstream / upstream) in 200
meters.
Q5: Are VDSL1 modems compatible with 2178HSEE / HSEE4?
A5:
Currently NO. Although 2178HSEE / HSEE4 (Prole 17a/30a)
are base on ITU-T G.993.2 VDSL2, but with different Proles,
so far they are not compatible with each other.
Q6:
W
hat is SNR and what’s the effect?
A6:
In analog and digital communications, Signal-to-Noise
29
Ratio, often written SNR, is a measure of signal strength
relative to background noise. The ratio is usually measured
in decibels (dB).
I
n di
gital communications, the SNR will probably cause a
reduction in data speed because of frequent errors that
require the source (transmitting) computer or terminal to
resend some packets of data. SNR measures the quality of
a transmission channel over a network channel. The greater
the ratio, the easier it is to identify and subsequently isolate
and eliminate the source of noise.
G
ener
ally speaking, the higher SNR value gets better line
quality, but lower performance.
Q7: W
hat is prole and what’s the benet?
A7: V
D
SL2 denes multiple band plans and conguration modes
(pro
les) to allow asymmetric and symmetric services in
the same binder (by designated frequency bands) for the
transmission of upstream and downstream signals. User
has the ability to select xed band plan. When 17a prole
is selected that provides long distance transmit with similar
performance, when 30a prole is selected that provides
short distance transmit with wire speed performance.
This page is intentionally left blank
This page is intentionally left blank
This page is intentionally left blank
Loading...