Cisco NM-2CT1-CSU 2 Ports Network Module
If you need a large quantity of NM-2CT1-CSU product - call us through our toll-free number at (800) 675 5044 or request a quote at live chat and our sales manager will contact you shortly.
Looking for assistance? Connect with one of our experts
+1 (800) 675 5044 (Toll-Free)
FREE Shipping. We are accepting NET 30 Days Purchase Orders. Get a decision in seconds, without affecting your credit.
5 of 9

Cisco NM-2CT1-CSU 2 Ports Network Module Channelized T1 ISDN Refurbished

Availability: In Stock
Part Number#: NM-2CT1-CSU
List Price was: $557.69
Your Price:
You Save: $412.69 (74% off)


Short Description:
NM-2CT1-CSU 2600 and 3600 Series Router Expansion Slots Ethernet Channelized T1/ISDN-PRI with CSU Internal 2-Ports Network Module | Made by Cisco | Refurbished
Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
Product Details of the Cisco NM-2CT1-CSU 2 Ports Network Module

One such offering is the Cisco NM-2CT1-CSU, designed specifically for the 2600 and 3600 Series Routers. This network module stands out for its capabilities in supporting Ethernet, Channelized T1, and ISDN-PRI with CSU, making it a versatile expansion slot option for users seeking enhanced connectivity. This 2 ports expansion slot is engineered to accommodate diverse networking needs, offering a seamless blend of Ethernet, Channelized T1, and ISDN-PRI support.

Compatibility with 2600 and 3600 Series Routers

The NM-2CT1-CSU is specifically crafted to complement the 2600 and 3600 Series Routers from Cisco. This ensures a high level of compatibility, allowing users of these router series to expand their networking capabilities seamlessly. Whether it's the robust features of the 2600 Series or the advanced functionalities of the 3600 Series, the NM-2CT1-CSU caters to the diverse requirements of these routers.

Key Features of Expansion Slots Network ModuleInternal 2-Ports Design

The Internal 2-Ports design of the NM-2CT1-CSU emphasizes its compact form factor, making it an ideal choice for users with space constraints or those seeking a streamlined networking setup. The internal placement of the ports adds to the module's aesthetic appeal and ensures a neat and organized networking infrastructure.

Ethernet Support

One of the standout features of the Cisco NM-2CT1-CSU is its support for Ethernet connectivity. Ethernet, being a widely adopted networking standard, is crucial for facilitating high-speed data transfer and communication between devices. The inclusion of Ethernet support in the NM-2CT1-CSU enhances the router's capabilities, enabling users to build efficient and reliable networks.

Channelized T1

The Channelized T1 capability of the NM-2CT1-CSU is a significant asset for users requiring dedicated and segmented channels for their data transmission. T1 lines are widely used for their reliability and consistent performance. With channelized T1 support, the NM-2CT1-CSU allows users to allocate specific channels for different purposes, optimizing the utilization of their network resources. T1 lines are widely used for high-speed data and voice communication. The channelized T1 feature allows users to divide the T1 line into multiple channels, each capable of carrying different types of data. This flexibility is crucial for organizations with diverse communication requirements.


Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) is another feature that adds versatility to the NM-2CT1-CSU. ISDN-PRI is a robust communication protocol that supports voice, data, and video services over a digital network. The inclusion of a Channel Service Unit (CSU) further enhances the reliability of the connection, ensuring a stable and secure network environment.

Internal Network Module Design

The internal design of the NM-2CT1-CSU is a key factor in its seamless integration with Cisco 2600 and 3600 Series routers. Being an internal network module means that it resides within the router chassis, eliminating the need for external devices or additional rack space. This design choice not only enhances the aesthetics of the network setup but also contributes to a more compact and organized infrastructure.

Extraordinary Performance

The NM-2CT1-CSU is designed to provide exceptional performance when it comes to handling T1 ISDN PRI connections on Cisco 2600 and 3600 series routers.

One of the key features that contribute to its performance is the use of channelization. Channelization divides the T1 lines into individual channels, which allows for more efficient use of bandwidth and enables the simultaneous use of multiple calls or data transmissions on the same line.

Additionally, the module includes a Channel Service Unit (CSU) which provides link-level error detection and correction. This helps to ensure that any errors or issues on the physical layer of the connection are quickly identified and corrected, which can help to minimize disruptions to the network.

Furthermore, the module supports up to 23 voice channels and one data channel on each T1 line. This allows for the module to handle a large number of simultaneous voice and data transmissions, which can be beneficial in busy enterprise and service provider networks.

Advantages of the Cisco NM-2CT1-CSU Network Module
  • Versatility in Connectivity: The Cisco NM-2CT1-CSU's support for both Ethernet Channelized T1 and ISDN-PRI offers a versatile solution for networking needs. This flexibility ensures that the network module can adapt to different communication requirements, making it suitable for a wide range of applications.
  • Streamlined Setup with Internal CSU: The integration of a Channel Service Unit within the network module simplifies the installation process. Users benefit from a streamlined setup that eliminates the need for external CSU equipment, reducing complexity and potential points of failure.
  • High-Speed Data Transfer with T1 Support: The T1 support provides high-speed data transfer capabilities, crucial for applications that demand rapid and reliable data communication. The channelized feature further optimizes bandwidth utilization, making it an efficient solution for data-intensive tasks.
  • ISDN-PRI for Multimedia Communication: The inclusion of ISDN-PRI support broadens the Cisco NM-2CT1-CSU's capabilities to include multimedia communication. This is particularly advantageous for scenarios where voice, video, and data need to be transmitted simultaneously over digital lines.
  • Compact Design with Internal Ports: The internal 2-ports network module contributes to the overall compact design of the Cisco NM-2CT1-CSU. This feature is beneficial for environments with limited space, allowing for efficient utilization of networking resources.
Interface Provided for Digital Workplace

The model can be used to provide T1 ISDN PRI connectivity for a digital workplace. A digital workplace refers to an environment where employees can work remotely or from different locations, and still have access to the same resources and tools as they would in a traditional office setting.

The NM-2CT1-CSU can be used to connect Cisco 2600 and 3600 series routers to T1 ISDN PRI lines, which provide digital telephone connections that can transmit data at a rate of 1.544 Mbps.

By using the ISDN PRI service, the module provides multiple "channels" for voice and data transmission, which can be used to support remote workers with phone and internet connectivity. Additionally, the module's channelization feature allows for more efficient use of bandwidth, which can help to ensure that remote workers have sufficient bandwidth to support their activities.

The module also includes a Channel Service Unit (CSU), which provides link-level error detection and correction, which can help to ensure that network disruptions are kept to a minimum.

Main Information for the Cisco NM-2CT1-CSU Network Module
  • Manufacturer: Cisco
  • Part Number or SKU# NM-2CT1-CSU
  • Product Type: Network Module
Technical Information of Expansion Slot(s) Module
  • Number of Network Port(s): 2
  • Form Factor: Internal
  • Data Link Protocol: Ethernet
  • Ports Type: Expansion Slot(s)
Interfaces / Ports
  • Interfaces/Ports Details: 2 x RJ-48 Channelized T1/ISDN PRI WAN

In short, the Cisco NM-2CT1-CSU proves to be a valuable addition to the 2600 and 3600 Series Routers, offering a comprehensive solution for Ethernet, Channelized T1, and ISDN-PRI connectivity. Its internal 2-ports design, coupled with a range of features, makes it suitable for diverse use cases, from small businesses to branch offices and remote access solutions. By following a systematic installation and configuration process, users can unlock the full potential of this network module, ensuring a reliable and efficient networking infrastructure steps provide a practical guide for addressing common issues, further enhancing the user experience with the Cisco NM-2CT1-CSU on the 2600 and 3600 Series Routers.

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.

Here, you can check more available conditions of your desired product NM-2CT1-CSU 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.


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.
  • We are not responsible for weather problems that may affect the delivery of goods by carriers. We cannot guarantee the exact delivery time, regardless of the carriers' claims.
  • 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.