DSL (Digital Subscriber Line) technology is a type of internet connection that uses existing telephone lines to provide broadband internet access. It works by using a frequency band that is separate from the band used for voice communication, which allows data to be transmitted over the telephone line without interfering with voice calls.
DSL technology supports various protocols, including ADSL (Asymmetric Digital Subscriber Line), VDSL (Very High-Speed Digital Subscriber Line), and DSL Lite. Each protocol has its own set of specifications and can support different data transfer rates and distances.
ADSL is the most widely used DSL protocol and is typically used for residential and small business internet connections. It can support data transfer rates of up to 24 Mbps downstream and 3.3 Mbps upstream, but the actual data transfer rate may vary depending on the distance between the modem and the telephone exchange.
VDSL is a faster and more advanced version of DSL technology that can support data transfer rates of up to 100 Mbps downstream and 50 Mbps upstream over short distances. VDSL is commonly used for high-speed internet connections in large businesses and multi-dwelling units.
DSL modems are devices that connect to a telephone line and convert the digital signal from the internet into an analog signal that can be transmitted over the phone line. They also receive the analog signal from the telephone line and convert it back into a digital signal that can be transmitted over the internet.
Compatibility and InteroperabilityCompatibility and interoperability refer to the ability of different hardware and software systems to work together seamlessly. In the context of networking, it is crucial to ensure that different network devices and software applications are compatible with each other and can interoperate without any issues.
Compatibility refers to the ability of a network device to work with other devices and software applications. For example, a router should be compatible with a modem, a switch should be compatible with a router, and a firewall should be compatible with a network operating system.
Interoperability, on the other hand, refers to the ability of different devices and software applications to work together and exchange information in a standard and consistent way. For example, different routers from different vendors should be able to interoperate with each other and exchange routing information using standard protocols such as OSPF, BGP, or EIGRP.
Ensuring compatibility and interoperability is essential to avoid issues such as network downtime, data loss, and security vulnerabilities. To achieve compatibility and interoperability, it is essential to follow industry standards and best practices and to thoroughly test different devices and software applications before deploying them in a production environment.
Network administrators and engineers should also stay up to date with the latest networking technologies and standards to ensure that their network devices and software applications are compatible and interoperable with the latest technologies and standards.
Quality of Service (QoS)Quality of Service (QoS) is a set of techniques and technologies used to prioritize and manage network traffic to ensure that critical applications and services receive the necessary bandwidth, latency, and other network resources to perform optimally.
QoS allows network administrators to classify and prioritize network traffic based on the type of application, the source and destination of the traffic, and other criteria. For example, video conferencing traffic can be prioritized over email traffic to ensure that the video traffic receives enough bandwidth and low latency to provide a smooth and high-quality user experience.
QoS can be implemented using various mechanisms such as packet classification, traffic shaping, congestion avoidance, and queue management. These mechanisms work together to manage network traffic and ensure that the most critical applications and services receive the necessary network resources.
Packet classification involves identifying different types of traffic and assigning them to specific QoS classes or queues. This is done using various techniques such as Deep Packet Inspection (DPI), Differentiated Services (DiffServ), and Class of Service (CoS).
Traffic shaping is a technique used to control the rate of traffic sent to the network to prevent congestion and ensure that the available bandwidth is used efficiently. Congestion avoidance mechanisms such as Random Early Detection (RED) and Explicit Congestion Notification (ECN) are used to prevent network congestion and ensure that traffic is managed appropriately.
Queue management is the process of managing traffic queues to ensure that the most critical traffic is given priority. This is done using various queuing mechanisms such as First-In-First-Out (FIFO), Priority Queuing (PQ), Weighted Fair Queuing (WFQ), and Class-Based Queuing (CBQ).
Overall, QoS is essential for ensuring that critical applications and services receive the necessary network resources to perform optimally, while less critical traffic is managed appropriately to avoid network congestion and ensure efficient use of network resources.
General Information
- Manufacturer: Cisco Systems, Inc
- MPN: NIM-VA-B
- Brand Name: Cisco
- Product Name: Multi Mode VDSL2/ADSL/2/2+ NIM Annex B
- Device Type: DSL modem
- SKU: NIM-VA-B
- Form Factor Internal
Modem
- Bus: Network Interface Module (NIM)
- Connectivity Technology: Wired
- Processor: Broadcom
- Digital Signaling Protocol: ADSL over ISDN, ADSL2, ADSL2+, VDSL2
- Protocols & Specifications: ITU G.992.1 (G.DMT) Annex B, ITU G.993.2, ITU G.992.5 Annex B, ITU G.992.3 Annex B
Expansion / Connectivity
- Interfaces: 1 x VDSL2 - RJ-11
Dimensions & Weight
- Width: 3.5 Inch
- Depth: 7.2 Inch
- Height: 1.3 Inch
- Weight: 6.38 Oz
Compatibility
- Cisco 4451-X, 4451-X Application Experience, 4451-X Integrated Services Router, 4451-X Integrated Services Router Security Bundle, 4451-X Integrated Services Router Voice and Video Bundle, 4451-X Integrated Services Router Voice Security Bundle ¦ Cisco ISR 4321, 4331, 4351, 4431
Here, you can check more available conditions of your desired product NIM-VA-B at a competitive price. We are trying our best to meet your needs on the enterprise-level computer, server, data centre, and networking hardware. You are welcome to ask our live chat or get live representative support over the phone.
Other Available Conditions for this Part
Other Available Categories For - Networking - Expansion Module
Warranty
ALLHDD guarantees that the products will not have defects in material that will affect the product's functionality during the Standard Warranty Period. The warranty period starts when the merchandise/items from our warehouse.
What does ALLHDD.Com warranty cover?
30-days to 3 years warranty:
Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.
What is not covered by our warranty?
The reason why our warranty does not cover any problem caused by the following conditions:
(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;
(b) any misuse outside the instructions in the user manual for any specific product;
(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.
What is the Manufacturer/Brand Warranty?
In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).
For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
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Important notes:
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Individual product warranty mentioned on each item product description page/detail page.
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Delivery
Shipping Options and Estimated Delivery Time
UPS Shipping Options:
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UPS 3 Day Select®
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FedEx Shipping Options:
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Available throughout all 50 states (Hawaii is outbound only)
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Available throughout all 50 states
FedEx First Overnight®
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Available throughout all 50 states
Worldwide Shipping Options:
UPS®/FedEx® International Economy
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UPS®/FedEx® International Priority
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UPS®/FedEx® Ground Shipping Canada
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Important notes:
- The processing of orders with Ground Shipping can take up to 24-48 hours. But we try to process all orders the same day.
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- Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.
