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NV-600RI - Industrial VDSL2 CPE Router
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The NV-600LI/RI is our managed industrial Ethernet extension solution using the G.993.2 VDSL2 standard
Flexible Configuration The NV-600RI support two modes, one is Bridge mode, another is Router mode. Bridge mode is easy to install, and features a variety of packet can be directly pass through. Router mode is a router which networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. A data packet is typically forwarded from one router to another through the networks that constitute the internet work until it reaches its destination node.
Interleave delay support Interleave delay function is used in digital data transmission technology to protect the transmission against noise issue and data error.
About harsh environment applications The NV-600LI can used in the harsh environment, such as -20°C ~ 70°C (-4°F ~ 158°F), and metal case compliant with the IP-30 design. The design of the IP-30 can prevent the invasion of small stones within the NV-600LI.
* Specifications are subject to change without prior notice.
1. What is NV-600RI related products?
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. • Power off and re-power on the VDSL bridged. • Verify that the bridge and attached device are power on. • Be sure the cable is plugged into both the bridge and corresponding device. • Check if the proper cable type is used and its length exceed specified limits. • Check the bridge on the attached device and cable connections for possible defects. • Replace the defective bridge or cable if necessary.
4. Why is the VDSL Link cannot be established.
Because VDSL setting failure or phone cable length is over the specification limit. 4.1 Please make sure that the phone wire must be connected between NV-600LI(CO) and NV-600RI(CPE) when both are power on. NV-600LI(CO) will do link speed function depending on phone wire length, therefore if NV-600LI(CO) can’t detect NV-600RI(CPE) over phone wire while both power on, this will cause the link to fail. Note: 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. 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 and CPE within 300 meters RJ-11 phone cable got only less than 10 Mbit/s
Cause:
• Some operating system limited the maximum bandwidth, such as windows series OS. 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. VDSL2 CO router cannot link with CPE router.
9. What is the maximum Ethernet frame MTU for these routers?
NV-600LI/RI maximum ethernet frame MTU is 1536 bytes.
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