Cisco C2921-CME-SRST/K9 3 Port Networking Router 10-100-1000
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C2921-CME-SRST/K9 Cisco 2921 Integrated Services Router Refurbished

Availability: In Stock
Part Number#: C2921-CME-SRST/K9
List Price was: $1142.31
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Short Description:
C2921-CME-SRST/K9 2921 Integrated Services Router (ISR) Voice Bundle With PVDM3-32F | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

Introduction to the Service Router

The Cisco 2921 Integrated Services Router (C2921-CME-SRST/K9) is a powerful and versatile device designed for small to medium-sized businesses and enterprise branch offices. It is built on the Cisco Unified Computing System (UCS) platform and offers advanced security and voice capabilities.

The router comes with a built-in Cisco Unified Communications Manager Express (CME) feature, which is a software-based IP telephony solution that provides call processing, voicemail, and automated attendant capabilities. It also has a Survivable Remote Site Telephony (SRST) feature, which is a failover solution that allows remote sites to maintain basic voice communication in the event of a WAN failure.

The C2921-CME-SRST/K9 offers a wide range of security features, including a firewall, VPN, and intrusion prevention capabilities, to protect the network from potential threats. Additionally, it provides a variety of connectivity options, including Gigabit Ethernet and serial interfaces, to support different types of network devices and services.

Configuration and Management

The configuration and management of the Cisco 2921 Integrated Services Router (C2921-CME-SRST/K9) can be done through several methods, including the command-line interface (CLI), the web-based graphical user interface (GUI), and the Cisco Configuration Professional (CCP) software.

  • Command-line Interface (CLI): The CLI is the primary method of configuring and managing the router. It allows users to enter commands and view the router's configuration and status. The CLI can be accessed through a console or remote connection using Telnet or SSH.
  • Web-based Graphical User Interface (GUI): The web-based GUI, also known as Cisco SDM, allows users to configure and manage the router through a web browser. It provides a user-friendly interface for tasks such as configuring network interfaces, setting up security policies, and monitoring the router's status.
  • Cisco Configuration Professional (CCP): The Cisco Configuration Professional (CCP) software is a graphical management tool that simplifies the configuration of Cisco routers and switches. It provides wizards and templates to help users quickly and easily configure the router, including the setup of basic network settings, security policies, and voice features.

In general, the configuration and management of the Cisco 2921 Integrated Services Router (C2921-CME-SRST/K9) can be done through a combination of command-line, web-based GUI, and the Cisco Configuration Professional (CCP) software, depending on the user's preference and level of expertise.

Quality of Service (QoS) Capabilities

The Cisco 2921 Integrated Services Router (C2921-CME-SRST/K9) has a range of Quality of Service (QoS) capabilities that can help manage and prioritize network traffic. These capabilities include:

  • Class-Based Weighted Fair Queuing (CBWFQ): This is a queuing technique that assigns a specified amount of bandwidth to different traffic classes based on their priority level. This helps to ensure that critical traffic such as voice and video is given priority over less critical traffic such as file transfers.
  • Low Latency Queuing (LLQ): This is a queuing technique that prioritizes delay-sensitive traffic such as voice and video over other types of traffic. It uses a strict priority queue to ensure that delay-sensitive traffic is not held up by other types of traffic.
  • Class-Based Marking (CB Marking): This is a technique that allows users to mark packets with a specific value, such as a Differentiated Services Code Point (DSCP) or a Class of Service (CoS) value, to indicate the priority level of the packet.
  • Traffic Shaping: This is a technique that regulates the rate at which traffic is sent to ensure that it does not exceed the available bandwidth. This helps to prevent congestion and ensure that traffic is sent at a consistent rate.
  • Link Fragmentation and Interleaving (LFI): This is a technique that breaks large packets into smaller ones, and interleaves them with other packets to reduce the impact of large packets on delay-sensitive traffic such as voice and video.
  • Congestion Management: The router uses a variety of congestion management techniques such as tail drop and random early detection (RED) to help ensure that the network does not become congested and to prevent any packet loss.

All these QoS capabilities, when properly configured, help to ensure that the network's bandwidth is used efficiently and that delay-sensitive traffic is given priority over other types of traffic.

General Information

  • Manufacturer: Cisco
  • Manufacturer Part Number: C2921-CME-SRST/K9
  • Product Series: 2900
  • Product Model: 2921
  • Product Name: 2921 Integrated Services Router
  • Product Type: Router

Interfaces / Ports

  • Total Number of Ports: 3
  • USB: Yes
  • Management Port: Yes
  • Number of Broadband (RJ-45) Ports: 3

I/O Expansions

  • Number of Total Expansion Slots: 12
  • Expansion Slot Type: HWIC
  • Expansion Slot Type: PVDM
  • Expansion Slot Type: SFP (mini-GBIC)

Network & Communication

  • Network Technology: 10/100/1000Base-T
  • Ethernet Technology: Gigabit Ethernet


  • Standard Memory: 512 MB
  • Maximum Memory: 2.50 GB
  • Memory Technology: SDRAM
  • Flash Memory: 256 MB
  • Memory Card Supported: CompactFlash (CF) Card

Power Description

  • Input Voltage: 110 V AC
  • Input Voltage: 220 V AC
  • Power Source: Power Supply
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days

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.

Please choose your location for calculate shipping cost.


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:

We can provide additional warranty service/support for any product you purchase from us if you need additional warranty coverage before finalizing the order from ALLHDD.Com. You need to ask in live chat/help or call us for more information.

Individual product warranty mentioned on each item product description page/detail page.

Free Technical support on purchased items, our expert consultancy over the phone, by email, by live chat, or by remote login.


Shipping Options and Estimated Delivery Time

UPS Shipping Options:

FREE UPS® Ground (Free shipping to all orders for 48 states!)
Estimated delivery time: 4-7 business days

UPS 3 Day Select®
Estimated delivery time: 3 business days

UPS 2nd Day Air®
Estimated delivery time: 1-2 business days, Delivery by 10:30 AM or 2:00 PM

UPS Next Day Air® Standard Overnight
Estimated delivery time: Overnight 2-5 PM, Standard Overnight Delivery.

UPS Next Day Air® - Priority Overnight
Estimated delivery time: Overnight Delivery (Next Business Day) Delivery by 10:30 AM or 12:00 PM

UPS Next Day Air® First Overnight - Early A.M
Estimated delivery time: Overnight 8:00 AM, Early morning, overnight delivery for your time-critical shipments.

UPS® First Overnight - Saturday
Estimated delivery time: Overnight 8:30 AM – Saturday

FedEx Shipping Options:

FedEx Ground®
Estimated delivery time: (4–7 business days in the contiguous 48 states)
*For residential delivery via FedEx Ground use FedEx Home Delivery®
Estimated delivery time: 4−7 business days, based on the distance to the destination.

FedEx Express Saver®
Estimated delivery time: 3 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states (except Hawaii and Alaska)

FedEx 2Day®
Estimated delivery time: 2 business days (by 4:30 PM to U.S. businesses; by 8:00 PM to residences)
Available throughout all 50 states

FedEx Standard Overnight®
Estimated delivery time: Next-business-day (by 4:30 PM to U.S. businesses and by 8:00 PM to residences)
Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
Estimated delivery time: Next-business-day (by 10:30 PM to U.S. businesses, noon to most residences)
Available throughout all 50 states

FedEx First Overnight®
Estimated delivery time: Next-business-day (by 8:30 or 9 AM to most areas)
Available throughout all 50 states

Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

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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  • If you have any specific delivery time requirements, please contact our customer support and someone from our customer service team will be able to help you.
  • You can estimate the shipping cost from the products detail page, also available on the checkout page
  • The shipping cost depends on box dimensions, weight, and zip/postal code
  • To get a FedEx® delivery service you need to mention it on the checkout page notebox.
  • For urgent shipments, please contact our customer service.
  • Shipping cut off 4:00 PM (Monday-Friday) and available blind drop shipment.