Cisco CP-PWR-8821-NA Power Supply AC Adapter
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Why CP-PWR-8821-NA Cisco Ip Phone 8821 Power is the best?

Availability: In Stock
Part Number#: CP-PWR-8821-NA
3% Discount on Checkout

Short Description:
CP-PWR-8821-NA Wireless Ip Phone 8821 Power Supply For AC Adapter | Made by Cisco | Refurbished

Interface Types of This Product: AC Adapter

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
We are giving specifications below, why one should consider procuring Cisco AC Adapter Power Supply features, a general overview, description, performance specification, relevant images, a competitive price infographic, and technical information about the CP-PWR-8821-NA model with compatibility.

Power output and compatibility of AC Adapter

The CP-PWR-8821-NA is a power supply specifically designed for use with the Cisco IP Phone 8821. It has an output of 12V DC, and is rated at 1.5A. This power supply is compatible only with the Cisco IP Phone 8821 and not with any other models of Cisco IP Phones.

Installation and setup of Power Supply

  • Unpack the Power Supply: Carefully unpack the power supply and check that all the components are present and in good condition.
  • Connect the Power Supply: Connect the power supply to a power outlet using the included power cord.
  • Connect the Phone: Connect the phone to the power supply using the included power cord.
  • Power On: Turn on the power supply and the phone. The phone will begin to boot up.
  • Configure the Phone: Follow the on-screen instructions to configure the phone. This may include setting up the network settings, configuring the phone's IP address, and setting up voicemail.
  • Test the Phone: Test the phone by making a call to ensure that it is working properly.
  • Finalize the Setup: Once the phone is configured and working properly, finalize the setup by securing the power supply and phone in a safe and secure location.
  • To ensure proper functioning and performance, it is recommended to use Cisco power supply units and power cords.
  • Keep the phone away from the direct sunlight, high humidity, and high temperatures.
  • Keep the power supply away from the sources of electrical noise such as radio transmitters, motors, and fluorescent lights.
  • Always use the power supply that is rated for the specific phone model.
  • When disconnecting the power supply, always unplug it from the wall outlet first before disconnecting it from the phone.

Troubleshooting and maintenance

Troubleshooting the Power Supply of the CP-PWR-8821-NA Cisco IP Phone 8821 Power Supply involves identifying and resolving issues that may prevent the device from providing power to the IP phone. The following steps can be taken to troubleshoot power supply issues:

  • Check the power cord and outlet: Ensure that the power cord is securely plugged into the outlet and that the outlet is functioning properly.
  • Check the voltage: Verify that the voltage at the outlet is within the range specified for the power supply (100-240 VAC).
  • Check the power supply: Inspect the power supply for any signs of damage or wear, such as bent or broken pins, or visible damage to the casing.
  • Check the IP phone: Verify that the IP phone is properly connected to the power supply and that the power indicator light is on.
  • Check the power supply settings: Verify that the power supply settings are configured correctly, such as the input voltage and current.

Maintenance of the Power Supply of the CP-PWR-8821-NA Cisco IP Phone 8821 Power Supply involves regular cleaning and inspections to ensure that the device is functioning properly and to prevent potential issues. The following steps can be taken to maintain the power supply:

  • Clean the power supply: Use a dry cloth to wipe down the power supply, removing any dust or debris that may have accumulated.
  • Inspect the power supply: Check for any signs of wear or damage, such as bent or broken pins or visible damage to the casing.
  • Check the power supply settings: Verify that the power supply settings are configured correctly, such as the input voltage and current.
  • Update the firmware: Ensure that the latest firmware is installed on the power supply to ensure optimal performance and to fix any known issues.
  • Test the power supply: Perform regular tests to ensure that the power supply is providing the correct voltage and current to the IP phone.

General Information

  • Manufacturer Cisco Systems, Inc
  • Manufacturer Part Number CP-PWR-8821-NA
  • Brand Name Cisco
  • Product Name AC Adapter
  • Packaged Quantity 1
  • Product Type AC Adapter

Technical Information

  • Device Supported IP Phone

Power Description

  • Input Voltage 120 V AC


  • Package Contents
  • AC Adapter

About Refurbished Products

Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.

AC power adapters are external power supplies for portable computers such as laptops and tablets. As the name suggests, they convert AC power from the mains supply to a stable DC power that the computers require. Each Ac adapter has an output power rating depending on the device it is intended for. An external power supply has made it possible to design slimmer and more portable PCs.

Highly Efficient AC Adapters

When buying a new AC adapter, you need to consider its efficiency. Just as a reminder, this is the ratio of output power and input power. An efficient AC adapter reduces power wastage and generates less heat, a characteristic of almost all AC adapters. They depend 100% on the natural flow of air for cooling because of the less heat generated.

Ultimate Protection from Power Surges

Voltage spikes are rare, but when they occur, they can cause damages. AC power adapter is designed with protection features for over-voltage, over-current, short circuit, and over-temperature. Under no circumstance will your system be affected when there is a power problem on the mains. The over-temperature protection prevents the damage of the adapter itself, which should automatically recover when the condition is removed. Some adapters may require the disconnection of input power to the adapter.

Excellent Power Output

The AC power adapters here are all switch-mode power supplies. They can deliver more power than linear regulated power supplies for a given size and cost. It will not cost you as much as it would if you choose the linear regulated power supplies. SMPS are also known for high efficiency and reliability.

Buying the Right AC Adapter

First, define the intended use for your AC power adapter because every power supply is designed for a specific computer model or brand. For example, 609947-001 HP 90 Watt power supply is for HP ProBook computers, and 332-1829 Dell 130 Watt Ac power adapter is for Precision Mobile Workstation. As you can notice, different ac adapters have varying output power and voltage rating. Using the wrong adapter can destroy your computer! If concerned about the harmonics, then you can choose an external power supply with power factor correction.

Shopping for these external power supplies can be a daunting task because of the many variants on the market. You will have a better experience shopping for ac adapters at ALLHDD because we offer technical support to our customers. We also guarantee quality products and the package delivered on time.

Here, you can check more available conditions of your desired product CP-PWR-8821-NA 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.


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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.
Final Sale items are non-returnable/refundable in any situation. Any question? please ask our team before the shipment.

Important notes:

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