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NV-700L - Managed Single Master/Slave LAN Extender

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NV-700L
  Managed Single Master/Slave LAN Extender

 

 

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  • Features
  • Specifications
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NV-700L is a Managed Single Master/Slave LAN Extender, compliant to ITU-T G.993.2 standards. It supports CO/CPE side bridge mode and long distance transmission up to 2.5km. The proper applications are military training systems、train station、MRT、 weather station 、farm、ship、auto control systems、IP Surveillance、amusement park、parking system.

 

 

Flexible Configuration

The NV-700L supports both central office (CO) and customer-premises equipment (CPE) modes selectable through Web config. Customers can do the configuration for different needs adjustment.

 

 

Interleave delay support

Interleave delay function is used in digital data transmission technology to protect the transmission against noise issue and data error.
If during transit more than a certain amount of data has been lost then the data cannot be correctly decoded. Short bursts of noise on the line can cause these data packets to become corrupt and the bridge has to re-request data which in turn can slow down the overall rate at which data is transmitted.
Interleaving is a method of taking data packets, chopping them up into smaller bits and then rearranging them so that once contiguous data is now spaced further apart into a non continuous stream. Data packets are re-assembled by your lan extender.

 


 

 

• Adopts ARM Cortex A9 dual-core processor
• Supports Master/Slave Mode selectable by Web config
• Supports G.998.4 G.INP
• Supports up to 100 Mbps symmetric
• Support 8 bands selectable
• Support USB 2.0 for connecting USB Dongle
• Supports IPv4/IPv6 NTP Client
• Support static routing for IPv4 and IPv6 forwarding
• Mac Address based filtering
• Web-based management
• Support IGMP snooping v2/v3
• Compliant with IEEE 802.3 & 802.3u Ethernet Standard
• Support VLAN Tag pass through
• Compliant with ITU-T G993.2 VDSL2 standard
• Support 8 queue MFC/DSCP both type QoS
• Supports HTTP/HTTPS web management
• Support SSL / SSH security
• Support remote management and monitor
• Support configuration backup and restore
• On board surge protection for Line port
• Supports Dual Firmware Image Backup
• Supports SNMP v1/v2
• On board POTS/ISDN splitter
• Supports TR-069
 
 
 
* Specifications are subject to change without prior notice.

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 Standard Conformance
 Standard:
 IEEE802.3/802.3u standards
 ITU-T G992.1/G992.3/G992.5/G993.1/ G993.2/G998.4 standards

 Regulatory Compliance:

 FCC
 CE

 RoHS compliance

 
 Hardware Specifications
 Physical Interface:

 4 x RJ-45 10/100Mbps auto-negotiation Ethernet port
 1 x RJ-11 / Terminal combo for VDSL2 line port

 1 x RJ-11 connector for POTS/ISDN device

 1 x Reset Button for resetting to factory default

 1 x USB2.0 for connecting USB dongle

 LED indication:

 1 x Power LED
 4 x Link/Active Status for Ethernet port
 1 x Link LED for VDSL2 port

 1 x USB LED

 1 x CO(Master) LED

 Switch method:
 Store and forward
 Flow control:
 Full duplex: IEEE 802.3x
 Half duplex: Back pressure
 Typical Power Consumption:
 4.4 W(Full load)
 Power Supply:
 Input Voltage: 12 VDC (Commerical-grade power adapter)
 Operating Temperature:
 0°C ~ 50°C (32°F ~ 122°F) Fanless, free air cooling
 Storage Temperature:
 -20°C ~70°C (-4°F ~ 158°F)
 Humidity:
 10 to 90% (non-condensing)
 Dimensions:
 184 x 146 x 40 mm (7.2" x 5.74 " x 1.57")
 Weight:
 approx. 0.4 kg
 EMC Certification:
 EMI Compliant: FCC

 EMS Compliant: CE mark

 

* Specifications are subject to change without prior notice.

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LAN Distance Extension
First a quick overview on a complete setup of LAN extender Master/Slave LAN extender.

NV-700L is a LAN extender leverages the extraordinary bandwidth promise of VDSL2 technology

(max. 100Mbps Symmetric)

 

 
 

 

 

 

Release Date
File
Version
Download
Jan, 2018
  Datasheet
N/A
Aug, 2018
  User's manual
B2

 

 

 

1. What is NV-700L related products?

 

NV-700L can fully compatible with NV-600A, NV-720D, NV-720R, NV-720S

 

2. POWER indicator does not light up (green) after power on.

 

Check the power plug by plugging in another that is functioning properly. Check the power cord with another device. If these measures fail to resolve the problem, have the unit power supply replaced by a qualified distributor.

 

3. Link indicator does not light up (green) after making a connection.

 

Network interface (ex. a network adapter card on the attached device), network cable, or switch port is defective.

• Verify that the switch and attached device are power on.

• Be sure the cable is plugged into both the bridge and corresponding device.

• Verify that the proper cable type is used and its length does not exceed specified limits.

• Check the modem on the attached device and cable connections for possible defects

• Make sure that the phone wire must be connecting NV-700L first, when powered on

• Replace the defective modem or cable if necessary.

• Or try to change band profile as 17a for getting long reach

 

4. Why is the VDSL Link cannot be established.

 

  1. VDSL setting failure or phone cable length is over the specification limit.
  2. Solutions:
  3. 3.1 Please make sure that the phone wire must be connected between NV-700L(CO) and NV-720R(CPE) when both are power on. NV-700L(CO) will do link speed function depending on phone wire length, therefore if NV-700L(CO) can’t detect NV-720R(CPE) over phone wire while both power on, this will cause the link to fail.
    3.2 Please check phone wire, we recommend use 24-26 gauge with twisted pair and without rust.
    3.3 Please reinsert power when change cable length or link time over 3 minutes.
  4. 3.4 Or try to change band profile as 17a for getting long reach
  5. Note:
  6. Phone wire must meet CAT 3 standard or above and without clustering, otherwise will cause more cross talk issue to reduce DSL power driver.

 

5. What is VDSL2?

 

Very-high-speed digital subscriber line 2 (VDSL2) is an access technology that exploits the existing infrastructure of copper wires that were originally deployed for traditional telephone service. It can be deployed from central offices, from fiber-optic connected cabinets located near the customer premises, or within buildings. It was defined in standard ITU-T G.993.2 finalized in 2005.
VDSL2 was the newest and most advanced standard of digital subscriber line (DSL) broadband wireline communications. Designed to support the wide deployment of triple play services such as voice, video, data, high definition television (HDTV) and interactive gaming, VDSL2 was intended to enable operators and carriers to gradually, flexibly, and cost-efficiently upgrade existing xDSL infrastructure.

The protocol was standardized in the International Telecommunication Union telecommunications sector (ITU-T) as Recommendation G.993.2. It was announced as finalized on 27 May 2005,[1] and first published on 17 February 2006. Several corrections and amendments were published in 2007 through 2011.

VDSL2 is an enhancement to very-high-bitrate digital subscriber line (VDSL), Recommendation G.993.1. It permits the transmission of asymmetric and symmetric aggregate data rates up to 200 Mbit/s downstream and upstream on twisted pairs using a bandwidth up to 30 MHz.

VDSL2 deteriorates quickly from a theoretical maximum of 250 Mbit/s at source to 100 Mbit/s at 0.5 km (1,600 ft) and 50 Mbit/s at 1 km (3,300 ft), but degrades at a much slower rate from there, and still outperforms VDSL. Starting from 1.6 km (1 mi) its performance is equal to ADSL2+.

ADSL-like long reach performance is one of the key advantages of VDSL2. LR-VDSL2 enabled systems are capable of supporting speeds of around 1–4 Mbit/s (downstream) over distances of 4–5 km (2.5–3 miles), gradually increasing the bit rate up to symmetric 100 Mbit/s as loop-length shortens. This means that VDSL2-based systems, unlike VDSL1 systems, are not limited to short local loops or MTU/MDUs only, but can also be used for medium range applications.

 

6. What is SNR(Signal-to-Noise)

 

Signal-to-noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power. A ratio higher than 1:1 indicates more signal than noise. While SNR is commonly quoted for electrical signals, it can be applied to any form of signal (such as isotope levels in an ice core or biochemical signaling between cells). The ratio is usually measured in decibels(dB)

The signal-to-noise ratio, the bandwidth, and the channel capacity of a communication channel are connected by the Shannon–Hartley theorem.

In digital 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.

 

7. Connected the Co Modem with CPE Modem within 300 meters RJ-11 phone cable got only less than

10 Mbit/s

  1. Cause:
  2. • Some testing program which is base on TCP/IP protocol such as FTP, Iperf, NetIQ, the bandwidth of testing outcome will be limited by TCP window size.

     

    Solution:

    We recommend to test VDSL2 bandwidth best by Smartbit equipment (Packet generator), if you don't have Smartbit, we recommend test that by IPERF program, and TCP window size must be setted max. 64k, the parameter as iperf –c server IP address –i 1 –t 50 –w 65535 for client side.

8. We need to set up a default gateway on a NV-700L pair which are in Bridge mode, as they want to manage the units from a different network.

 

When the application is used within the LAN, the switch(bridged) mode is not necessary to set up a gateway .However, if the application crosses various network segments (LAN to WAN or WAN to LAN), you must set up a gateway to connect different network segment.
Regarding how to configure a default gateway at switch(bridged) mode for crossing various network segments.
Configuration gateway example from static routing:
Destination LAN IP: 0-0-0-0
Subnet Mask: 0-0-0-0
Gateway:  255-255-255-0

Note: Static Routing functionality is used to define the connected Gateway between the LAN and WAN.

 

9. What can I do if I forgot my password?

 

If you forgot your password, you must reset your router. This process will change all your settings back to the factory default. To reset the router, locate the reset button on the rear panel of the unit. With the router powered on, use a paperclip to hold the button down for over 5 seconds. Release the button and the modem will go through its reboot process. The default IP is 192.168.16.249. When logging in, the default username and password are both “admin”.

 

10. What is the maximum Ethernet frame MTU for these modems?

 

NV-700L maximum Ethernet frame MTU is 1522 bytes.