Download CoaxData SECTION_ENG.indd

2012
COAXDATA
COAXDATA

CONTENTS
1.
Ethernet coaxial adapter.
1.1
Coaxdata homeplug.
1.2
Physical description.
2.
Home networking.
3.
Home networking - Examples of application.
3.1
Home networking.
3.2
PLC option.
3.3
Hybrid option.
4.
Shared distribution networks.
5.
Coaxial network checking.
6.
Coaxial network checking steps.
7.
Shared distribution networks - Examples of applications.
7.1
Small/Medium shared distributions networks.
7.2
Using several master modem at the headend.
7.3
Making individual installations of home-networking in a number of
dwellings of a building.
7.4
Establishing AVLNs.
8.
Professional and special applications.
9.
Shared distribution networks - line amplifiers.
10. System management.
11. Coaxmanager software.
12. Snmp (simple network management protocol) with web interface.
2 Coaxdata
COAXDATA
The bandwidth of the coaxial cable allows to multiplex a number of services other than
televison.
Coaxdata is a state-of-the-art system that converts a television coaxial network into a high
speed local network. By means of Coaxdata, sharing resources (computers, printers, an
internet connection, etc) does not need any additional cable.
COAXDATA

ETHERNET COAXIAL ADAPTER
Coaxdata Homeplug
The Coax Data 200 Mbps-HDTV adapter makes the
transmission of data possible over the existing electrical
and/or coaxial distribution. The use of the already existing
coaxial network infrastructure allows for a rapid, easy and
economic installation of the system, without the need for
construction.
▶ Transfer of up to 200 Mbps, ideal for uses such as VoIP,
telephony, Internet TV, VoD, shared access to Internet
and IP data communications in general.
▶ Integrated quality of service (Quality of Service, QoS)
for prioritisation of the data. All this guaranteeing ideal
transmission and maximum safety by means of the
128bit AES coding.
▶ Flexible and upgradable solution for the construction
of segments of up to 253 devices. In the MDU/MTU
mode over coaxial alone, there is the possibility of
using up to 4 Masters in the same frequency band
(1012 slaves).
▶ No changes are necessary in the topology of the
coaxial network to coexist with existing TV services.
Coaxial cable high attenuations (~85dB) are supported.
Coaxial cable lengths up to 800m are supported as
well as power line lengths up to 200m .
▶ Remote management is possible by means of the Coax
Reference
Connectorization
Ethernet interface
Coaxial interface
Data coaxial interface
Bandwidth
Output level
Min. power spectral density
Output impedance
TV coaxial interface
Bandwidth
Through losses
Return losses
Output impedance
Power/Temperature
Mains voltage (50/60 Hz)
Max. consumption
Operating temperature
Firmware
Max. number of slaves
Max. length
data network
of Coax cable
Power line
Users per slave

Manager Software included in the CD and Control
Access Software.
▶ This allows configuring the devices with the parameters
that the installer may require:

Operating mode [Home Networking or MDU
(Multi Dwelling Unit) / MTU (Multi Tenant Units)]

QoS parameters

Access code to the network

And many other possibilities of adjustment.
▶ User Manual is included in the CD which comes with
the product.
MDU/MTU
7689
type
2 × RJ45
2 × F(TV+data)
MHz
dBμV
dBm/Hz
ohm
2-30
130
-135
75
MHz
dB
dB
ohm
57-2150
2
> 10
75
Vac
W/mA
ºC
100-240
4.6 / 45
-10 to +45
master
85 dB
85 dB
85 dB
85 dB
slave
slave
slave
m
no.
253 (1012 using 4
masters)
800
200
2
85 dB
85 dB
85 dB
85 dB
Multipoint-To-Multipoint
4 Coaxdata
slave
Point-To-Multipoint
Home Networking with automatic configuration master/slave
There is no conection between slaves
85 dB
no.
7689
COAXDATA
ETHERNET COAXIAL ADAPTER
Physical description
Coax / Hybrid
Coaxial cable
Electric cable
Coaxial Link Status
TV + data
TV
120 Mbps < throughput
70 Mbps < throughput < 120 Mbps
Ethernet 10/100 Mbps
0 Mbps < throughput < 70 Mbps
factory
reset
Medium connectivity switch
Coaxial & Electric cables
Coaxial cable only
Examples of application - Home Networking
BASIC INSTALLATION
Coaxial option.
One of the most typical applications
of the CoaxData-200Mbps-HDTV
modem, is used to share the services
of your Internet provider at home.
Ref. 7654
Using the modem, you will get access
to the services provided by your ISP
such as the Internet access, video
streaming or VoIP throughout the
home without requiring additional
infrastructure.
The following diagram shows a
prototype facility in which a user
can access the different services
provided by the Internet, anywhere
in the house.
You can also share printers and
media servers located in other
rooms of the same.
5 Coaxdata
the Internet
Share printer, NAS Media Server, the Internet, ... on the same network
COAXDATA

HOME NETWORKING
Examples of application - PLC option
BASIC INSTALLATION
The Coax Data 200Mbps-HDTV adapter
is factory configured to be able to
perform a Home Networking plugand-play installation. This allows for the
creation of an LAN, where all the devices
communicate with each other (peer-topeer).
MAINS
In this application it is used the electric
network infrastructure of the house for
data trnasmission (PLC).
The main benefit of this application
is based on the fact that the electrical
network reaches every corner of the
home.
the Internet
Examples of application - Hybrid option
BASIC INSTALLATION
The Coax Data 200Mbps-HDTV adapter
is factory configured to be able to
perform a Home Networking plugand-play installation. This allows for the
creation of an LAN, where all the devices
communicate with each other (peer-topeer).
MAINS
In this application it is used both coaxial
cable and electric infrastructures of the
house for data trnasmission (COAX +
PLC).
the Internet
In other words, whichever electric or
coaxial outlet can be a LAN point.
6 Coaxdata
COAXDATA
SHARED DISTRIBUTION NETWORKS
Coaxial network checking
Before to enface any shared distribution network to be equipped
with the capability for distributing data using the modem ref.
7689, it is nesessary to know if that particular network has its
return path in conditions to distribute data.
Some test equipment is necessary to carry out this job:
•
Field Strength Meter, with good specifications as to
measure the noise in the return path like our H45.
•
Return path simulator ref. 7637
•
Diplexer filters ref. 7654.
Our Field Strength Meter H45 meets all the requirements to do
this job.

H45
Simulador canal de retorno
0 1
7
6
2
3
5 4

7637
The first step is check the output of the Return Path Simulator
with the H45 Meter and record it a a reference for further
measures.
Simulador canal de retorno
0 1
7
6
7 Coaxdata
2
3
5 4
Set operating
mode to 7

7654
COAXDATA

SHARED DISTRIBUTION NETWORKS
Coaxial network checking steps
PWR
CTRL
Ref. 7654
Ref. 7654
The aim of all these steps is checking the status of the return path and
determine if it is in conditions to transmit data information.
1st STEP
Disconnect the output of the Headend and check the quantity of noise
generated by it in the return path 5-30 MHz
By means of the meter H45 it can be measured and must be equal or less
than 50 dBμV.
2nd STEP
Next, make the same measure but this time for the distribution network.
It is performed by connecting the H45 to the input of the distribution
network and checking that the noise generated by all its elements into the
return path 5-30 MHz never exceeds 25 dBμV.
3rd STEP
Check the attenuation of the distribution network for the return path
between the input of the distribution network and the worst case for
conecting a modem 7689. It must be equal or less than 80 dB.
PWR
CTRL
Ref. 7654
Ref. 7654
Simulador canal de retorno
0 1
7
6
2
3
5 4
Ref. 7654
Ref. 7654
Ref. 7654
is
Ref. 7654
Ref. 7654
on
Ref. 7654
Ref. 7654
Ref. 7654
8 Coaxdata
COAXDATA
SHARED DISTRIBUTION NETWORKS
Examples of applications
master
slave
Small/Medium shared distributions
slave
slave
slave
master
These type of networks used to work having
a master to control the rest of modems.
The Coax Data 200Mbps-HDTV adapter is
an ideal device for Networking country
Houses and small Hotels, where a master
is controlling the streaming of information
between the different slaves.
slave
This way it can be enabled/disabled any of
the CoaxData adapters by using a software
of control.
slave
Using several master modem at the headend
When there are several downlead coaxial sections, as it
happens in most of the large multi-dwellings buildings, you
can install several masters at the headend of the coaxial
distribution network. Each master serving an independent
coaxial downlead.
• In this case, we must note that there are several differences
with respect to facilities in which are established several
AVLN.
• The installation of several masters at the headend increases
the effective data-rate that the network is able to support,
slave
slave
where each data network is created in a independent coaxial
distribution, which increases the total system capacity by
facilitating the development of video streaming or IPTV.
• The master modems installed at the headend do not have
to be configured with different network password since they
operate separately on each coaxial distribution networks.
• To increase the isolation between these master modems, use
the filter diplexer ref. 7654 for mixing TV signals and data.
• In this type of schemes is also necessary to take into account
the losses suffered by the TV signal in the process for
multiplexing TV+Data signals; this is so because of the need
to chose the right type of taps for the distribution network.
Internet
Ref. 7654
9 Coaxdata
Ref. 7654
Ref. 7654
Ref. 7654
COAXDATA

SHARED DISTRIBUTION NETWORKS
Examples of applications
Making individual installations of homenetworking in a number of dwellings of a building.
Even though the outlets shall be properly isolated to prevent
that each one of the dwellings interfere with each other in
TV services and data, depending on the conditions of its
installation, they may not be adequately isolated; and then the
data networks installed at the dwellings of the building will
get interferences with each other.
In this case, you must install a diplexer filter 7654 at the
entrance of each dwelling coaxial network in order to avoid
that each of the nearby networks interfere with each other,
and that the noise of the head interferes with the quality of
the links.
The installation of these diplexers allow to determine the
perimeter in which the master serves a data network and
allows installation of multiple networks within a building or
dwelling.
Additionally, if it is not possible to install the filter, or suspect
that your system is being affected by a close network and
interfering with the quality of links, firmware 7689 provides a
mechanism
called additional mitigation that detects nearby networks and
adjusts its transmit power and receiver sensitivity to reduce
the effect that networks have with each other.
To do this, by running the CoaxManager program, you
can configure coaxData devices to detect nearby devices
belonging to another different network, what is known as
mitigation.
Of course, the CoaxManager program must be enabled (☑)
Network 1
diplexer ref. 7654
master
tap
slave
slave
slave
slave
ref. 7654
tap
Network 2
master
diplexer ref. 7654
slave
ref. 7654
tap
10 Coaxdata
slave
slave
slave
COAXDATA
SHARED DISTRIBUTION NETWORKS
Examples of applications
Establishing AVLNs
by setting MDU/MTU as the operating mode of the modem.
The ref. 7689 allows the installation of up four masters at the
headend, which increases the potential number of modems
that can be installed, but at the expense of total bandwidth
to share. Each of the networks created by a master is called
AVLN (AV logical network) and is established using different
Network Passwords.
The password must be different in each of the masters, and
each slave must be programmed with the master password
with which the slave wants to communicate.
This password is set by means of the CoaxManager program,
There is a limit to the maximum number of modems that can
manage an AVLN (1 Master + 253 Slaves).
By using 4 master modems, it can be increased the limit of
slave modems up to 4x253 = 1012 slaves.
Masters
AVLN _I
AVLN _II
AVLN _III
AVLN _IV
master
slave
router
slave
slave
slave
Internet
Headend
diplexer ref. 7654
Ref. 7654
TV
switch with port isolation
data
CoaxManager program
Control Access
4 way splitter
tap
Slave AVLN _III
Slave AVLN _I
tap
Slave AVLN _IV
Slave AVLN _II
Up to 1012 slaves working on the same coaxial distribution network.
When carrying out the installation of multiple masters
consider the following:
•
Always use the diplexer ref. 7654 for TV and data signals,
in order to ensure that the noise introduced by the
headend in the return channel does not affect the quality
of links.
•
Do not forget to schedule different passwords on each of
the masters to create different AVLNs.
•
Do not forget to program the password of each one of
11 Coaxdata
the slaves with the corresponding one to each of the
masters. If the slaves are not programmed with the
appropriate password, they will not able to communicate
with any master.
•
You can check the status of each of the networks by
running the CoaxManager program. To do this, you have
to communicate with each one of the masters modem
and verify the attenuation and the payload by simply
connecting a laptop to the switch and running the
program CoaxManager on each of the masters modem.
COAXDATA

SHARED DISTRIBUTION NETWORKS
Professional and special applications
Systems like these will need a support engineering for the design
and installation, for example:
•
MATV/SMATV large distributions
•
small/medium CATVs
•
small/medium HFCs
•
and, in general terms, distributions over coaxial cable in
buildings, medium and large hotels, housing management
companies, residential homes, schools, hospitals, cruise
ships, safety technology.
The system uses the return channel coaxial passive network,
and a determining factor is a
maximum attenuation of 85 dB
between points.
headend elements with high output signal levels, such as
channel processors, modulators, etc .... The existence of
these elements would cause that, if they are poorly filtered,
can add noise in the return channel of the network, thus
affecting the master modem operation and leading to
lower links quality.
A professional network is differentiated by the need to use the
management application/CoaxManager control included with
the product. This software must be installed to adjust the product
to certain characteristics that are out of the factory settings.
For setting up these professional
systems it is necessary to keep
in mind a number of common
characteristis to guarantee the
success of the job.
•
•
•
The presence of line
amplifiers to re-amplify
the TV signal
The data transmission
system on which is based
the ref. 7689 technology
works in the frequency
range 2-30 MHz, and is a
bidirectional system since
it generates signals coming
either from the slaves
connected to the outlets or
from the master located at
the headend.
This implies that the return
channel line amplifiers
should be passive in
order to ensure the
bidirectionality of the
return channel.
It will be exposed an installation scheme on which are
used two modems (ref. 7689) in a configuration called
“Repeater” which allows propagate and regenerate the
data signal.
Large number of users and outlets
The existence of a large number of outlets generates an
increasing of the interfering noise in the return channel.
This noise may appear in the outlets to a lesser degree,
and decisively at the headend, because, being a tree
configuration, the headend will add noise in each of the
branches.
Headend elements
CATV networks are characterized by the existence of
12 Coaxdata
The mode MDU/MTU (Multi-Dwelling/Multi-Tenant Unit) for
complex installations, allows the use of the adapter 200 Mbps
Coax-Data-HDTV in any coaxial network topology.
This mode implements communication over a coaxial network
in buildings, houses, hotels ..., establishing point to multipoint
communication.
To make these complex systems to work, the device must be
configured either as master or as slave. Both functions can play
the ref. 7689.
Master is the element that is usually installed in the distribution
headend to manage all network elements. Can be connected to
an ISP (Internet Service Provider) to provide Internet access.
A Slave is the element that provides the access point to the user.
COAXDATA
SHARED DISTRIBUTION NETWORKS
Example of a professional application
The figure below illustrates a typical distribution of a complex
consisting of bungalows spreaded over an area of 375×375
square metres approximately.
The challenge is just to desing a network in such a way that the
maximum attenuation in the worst case never will be higher
than 85 dB between the master and any of the slaves all along
the network.
This represents a professional solution to deliver at eact
bungalow a complete menu of services:
•
TV broadcast (QAM, COFDM)
•
IPTV
•
the Internet
•
Video-On-Demand (VoD)
•
Triple Play (VoIP)
Data transmission is performed making use of the PASSIVE
return path of the network (2-30 MHz).
This case study considers a network of 130 bungalows. That is,
130 units of the reference 7689 working as slaves of the master
unit located in the headend. The master unit can handle
up to 253 slave units, so the system could be significantly
larger, always subject to the condition of 85 dB of maximum
attenuation.
The router is located at the Headend, where a master modem
ref. 7689 controls the rest of modems that are operating as
slaves.
12 4
124
A1
HEADEND
T1
T1
12
25
25
T4
123
23
126
12
126
13
130
30
T10
T5
T9
12
29
29
127
12
27
2
128
12
1
2
122
122
22
T2
T3
T8 T7
104
10
104
04
121
121
12
116
T6
115
1
11
15
120
120
12
1 7
11
117
118
11
18
8
105
119
1
119
114
1
11
14
T18
106
06
113
3
112
2
10
1
107
0
07
75
75
T11
T12
10 3
10
103
111
1
108
108
8
74
74
T17
1
110
S1
10
09
9
83
83
73
3
102
10
1
02
84
T16
Sv2
85
5
8
81
T15
80
80
10
101
01
79
T47
72
2
100
1
00
82
T43
95
86
78
7
8
99
99
T42
66
T14
77
7
T13
T23
96
9
6
94
87
7
65
6
5
62
2
63
3
64
T45
67
7
97
97
98
98
T19
A5
76
6
T27
68
S5
A3
A2
88
88
93
9
3
T20
T38
61
61
T26
69
69
T21
T22
T24
70
T46
42
T28
92
92
89
89
T25
4
41
40
40
T39
71
71
60
60
S3
90
91
T40
59
5
9
34
4
T41
35
T29
33
3
3
36
52
58
8
37
7
38
38
39
3
9
53
3
51
1
32
2
57
7
31
4
43
30
0
24
24
56
6
29
29
22
22
21
21
T30
27
7
25
T37
26
6
S4
T31
49
9
45
5
A4
46
T33
T36
12
2
17
7
18
13
13
T35
15
5
14
T48
8
5
11
10
0
48
8
47
7
T34
16
16
19
19
9
7
1
6
3
4
13 Coaxdata
50
5
0
44
4
2
28
20
0
T32
54
55
55
23
23
2
COAXDATA

SHARED DISTRIBUTION NETWORKS
Shared Networks - Line amplifiers
In the likely event that there are line amplifiers for signal
reamplification on networks, caused by losses of coaxial
cable and distribution components, it is necessary to
ensure the coexistence of the data network with these
amplifiers.
Many times, line amplifiers tend to be unidirectional, ie
only amplify the TV signal from the headend to the outlet
of the user (forward channel).
PWR
The Internet
CTRL
This fact prevents data communications, since this is a
bidirectional system, and we need a communication
between the headend and the outlet, and vice versa.
Diplexer
TV - DATA
Master
To overcome this problem, the are several proposals that
will be exposed in next paragraphs and illustrations. Let
us review all possible situations as well as the procedure
to solve them.
Slave
Ref. 7654
Slave
Ref. 7654
Passive return channel inside the amplifier.
The first task will be always make tests to be sure
that the network is ready to accept the installation of
CoaxData modems; as it has been explained previously,
making use of a professional Field Strength Meter like
our H45, diplexers, Return Channel Simulator device
and the corresponding CoaxManager software.
Line amplifier with the possibility
of changing its configuration;
ready to be equipped with a
Return Path module.
If the amplifier is featured with the possibility of
inserting a Passive Return Path Module, there is no
nothing more to do. The system will function for both
forward path and return path.
Ref. 7654
Slave
Ref. 7654
14 Coaxdata
COAXDATA
SHARED DISTRIBUTION NETWORKS
Shared Networks - Line amplifiers
Passive bypass by using diplexer filter ref. 7654.
First of all, make tests to be sure that the network is
ready to accept the installation of CoaxData modems.
By using this configuration it is kept the structure
Master-Slave and the Remote Access Management as
well.
PWR
The Internet
CTRL
Diplexer
TV - DATA
Master
Slave
Ref. 7654
Slave
Ref. 7654
Line amplifier with the
possibility of changing its
configuration; ready to be
equipped with a Return
Path module.
Ref. 7654
Slave
Ref. 7654
15 Coaxdata
COAXDATA

SHARED DISTRIBUTION NETWORKS
Shared Networks - Line amplifiers
Bypass using the modem ref. 7689
First of all, make tests to be sure that the network is
ready to accept the installation of CoaxData modems.
The Internet
This configuration allows to reach longer distances
since the use of a new master after the amplifier,
extends again those 85 dB extra attenuation allowed
between the master and the slave.
PWR
CTRL
Diplexer
TV - DATA
Master 1
Slave of Master 1
Ref. 7654
Slave of Master 1
Ref. 7654
Slave of Master 1
The tradeoff is the impossibility of remote managing
since there is a intermediate step to Ethernet.
Master 2
Ref. 7654
Slave of Master 2
Ref. 7654
16 Coaxdata
COAXDATA
SHARED DISTRIBUTION NETWORKS
Shared Networks - Line amplifiers
Bypass by using the modem 7689 and the diplexer
filter ref. 7654.- High isolation.
First of all, make tests to be sure that the network is
ready to accept the installation of CoaxData modems.
PWR
The Internet
In this case it might happen that there were not
enough isolation. Then it could be used the solutions
already seen for cascade.
CTRL
Diplexer
TV - DATA
Master 1
Slave of Master 1
Ref. 7654
Slave of Master 1
Ref. 7654
Slave of Master 1
Master 2
Ref. 7654
Slave of Master 2
Ref. 7654
17 Coaxdata
COAXDATA

SYSTEM MANAGEMENT
CoaxManager Software
This CoaxManager Software tool allows setting the operating
mode and system parametres, as well as check either the
network status or links of each device.
Ad-hoc software development option i.e, management.
Networking or MDU/MTU (Multi Dwelling Unit/Multi-TenantUnit).
▶
Create private networks (encryption).
Scaning & configuration window
▶
▶
▶
▶
QoS parametres configuration.
▶
Firmware updating.
MACs (Media Access Control) limitation per Slave.
IGMP (Internet Group Management Protocol) configuration.
Detailed status link information, i.e SNR attenuation and
tonemap list; allowing to get an itemized view of the
installation performance.
line quality window
network checking window
advanced users QoS window
18 Coaxdata
COAXDATA
SYSTEM MANAGEMENT
SNMP (Simple Network Management Protocol) with Web interface
well as the access to the current state of the network.
Allows the remote magement of professional networks:
▶
Allows to configure the access mode of the coaxial
modems CoaxData 200 Mbps, in such a way that a device
can be enabled/disabled, set the access parameters like
bandwidth and the number of user per modem.
▶
Lets you check the status of a network by determining the
rate estimated between the links of the different devices.
▶
It allows the generation of alarms that alert the user of any
incident like the loss of a device link, its poor quality, as
▶
The system configuration can be accomplished using the
SNMP protocol itself or through a simple Web interface
for users without technical knowledge of this protocol.
To do this it is provided a complete MIB (Management
Information Database) specification that defines all the
SNMP objects implemented by the agent.
▶
Automatic sending of emails for tracking the system and
notifying incidents coming from either the management
system or the devices.
Internet
modem is configured as networking mode, the system
sends an alarm to indicate that the modem is operating in
a wrong way.
Access control setting-up requirements
For the installation of the SNMP access control is necessary a PC
with a Windows operating system NT/2000/XP/Vista/Windows7
and an Ethernet Network Interface.
▶
In the event that multiple masters have been installed on
the network, do not forget to ensure that the insulation
between them in the return channel is greater than 80dB.
If necessary, use the filters diplexers Ref.7654 between each
coaxial networks.
▶
In the event that multiple masters are installed, be sure that
the Switch that interconnects them must have activated
the port isolation feature.
The scheme of installation of the application is shown in the
figure above.
▶
The PC where it is installed the access control must be
connected to the master (s) of the network.
▶
The mode of operation of all installation modems will be
MDU / MTU. If it is installed the access control and some
19 Coaxdata
COAXDATA

SYSTEM MANAGEMENT
SNMP (Simple Network Management Protocol) with Web interface
Description
MAC Address
Master I
00:0E:7C:15:01:CE
Link State
Access State
Enable
Change
configure access
Configure access
Master II
00:0E:7C:15:02:00
Enable
Change
configure access
ROOM 101
00:0E:7C:15:01:ED
Enable
Change
configure access
ROOM 102
00:0E:7C:15:01:3C
Enable
Change
configure access
ROOM 103
00:0E:7C:15:02:66
Enable
Change
configure access
ROOM 104
00:0E:7C:15:02:07
Enable
Change
configure access
ROOM 105
00:0E:7C:15:02:4A
Enable
Change
configure access
ROOM 106
00:B0:52:00:00:17
Enable
Change
configure access
SNMP Agent
The devices menu shows
all modems detected by
the system, indicating their
MAC address and link state,
as well as the possibility
to configure their access
parametres.
Enabling
or
disabling
modems ir performed by
using the Enable/Disable
option. When a modem is
disabled, it is indicaetd by a
red circle.
To Eliminate a modem from
the list just make use of the
option Delete on the Access
Control List
20 Coaxdata
COAXDATA
SYSTEM MANAGEMENT
SNMP (Simple Network Management Protocol) with Web interface
This interface allows configuring the generation of traps to receive mails in a specific mail address. It also allows
activating/deactivating the alarms of the system.
21 Coaxdata
COAXDATA

2012
COAXDATA
Sede Central
Rúa B. de Conxo, 17
15706 Santiago de Compostela (SPAIN)
T. 902 686 400 F. 981 52 22 62
[email protected] - www.televes.com
22 Coaxdata