Cisco NM-1A-OC3MM Networking Network Module ATM
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NM-1A-OC3MM Cisco 1 Port ATM Oc-3 Network Module Refurbished

Availability: In Stock
Part Number#: NM-1A-OC3MM
List Price was: $192.31
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Short Description:
NM-1A-OC3MM 1 Port ATM Oc-3 Mile Multi-mode Fiber (Mmf ) Network Module For 2691 3600 3725 | Made by Cisco | Refurbished

Interface Types of This Product: Network Module ATM

Product Condition:
Warranty provided by ALLHDD.COM:
90 Days
We are providing specifications below to explain why you should consider purchasing the Cisco ATM Network Module Networking, including a general overview, performance specifications, relevant images, media files, and technical information about the NM-1A-OC3MM compatibility.

Maximizing Network Performance

Maximizing network performance of the NM-1A-OC3MM Cisco 1 Port ATM Oc-3 Network Module involves several steps that aim to improve the speed, efficiency, and stability of the network. Here are some tips on how to maximize its performance:

  • Firmware Update: Ensure that you have the latest firmware version installed on the module. This will help fix any bugs, improve performance, and add new features.
  • Quality of Service (QoS): Implement QoS on the network to prioritize network traffic, ensuring that important data such as voice and video are given priority over less critical data.
  • Network Configuration: Properly configure the network to reduce the amount of broadcast traffic, reduce collisions, and increase the speed of communication.
  • Cable Management: Use high-quality cables that are properly terminated and managed to reduce the amount of signal loss and improve network performance.
  • Load Balancing: Implement load balancing on the network to distribute the load evenly, reducing the chance of overloading any one component.
  • Monitoring and Maintenance: Regularly monitor and maintain the network to detect and resolve any issues that may be affecting performance.

Enhancing Network Security

The NM-1A-OC3MM Cisco 1 Port ATM Oc-3 Network Module is a crucial component in enhancing the security of a network. To enhance the security of this module, the following measures can be taken:

  • Authentication: Implementing strong authentication protocols such as CHAP, PAP or RADIUS can prevent unauthorized access to the network module.
  • Encryption: Implementing encryption protocols such as IPSec, SSL or TLS can protect sensitive data from being intercepted and read by unauthorized parties.
  • Firewall: Installing a firewall between the network module and the rest of the network can prevent unauthorized access and prevent malicious attacks from spreading.
  • Access control: Implementing access control measures such as access control lists (ACLs) can prevent unauthorized users from accessing sensitive data or performing harmful actions on the network.
  • Intrusion Detection System (IDS): Implementing an IDS can detect any suspicious network activity and alert network administrators of potential threats.
  • Virtual Private Network (VPN): Implementing a VPN can provide secure remote access to the network and protect sensitive data from being intercepted.
  • Regular software updates: Regularly updating the software of the network module can prevent vulnerabilities from being exploited by attackers.

By implementing these measures, the security of the NM-1A-OC3MM Cisco 1 Port ATM Oc-3 Network Module can be greatly enhanced and protected against potential threats.

Troubleshooting and Maintenance


  • Link Down: If the link is down, check the cable connections, cable type, and cable length. If the cable is okay, then check the configuration of the ATM Oc-3 Network Module and the device it is connected to.
  • Configuration Issues: If the module is not properly configured, the link may not come up. Check the configuration of the module and make sure it matches the device it is connected to.
  • ATM Cell Loss: If there is ATM cell loss, check the traffic rate and the amount of buffer memory available. If the traffic rate is too high, the module may be dropping cells.


  • Regular Inspection: Inspect the module regularly to ensure that it is free of dirt, dust, and other contaminants.
  • Firmware Upgrade: Regularly upgrade the firmware of the module to ensure that it is running the latest version.
  • Cleaning: Clean the module regularly to ensure that it is free of dirt, dust, and other contaminants.
  • Backups: Regularly back up the configuration of the module to ensure that it can be easily restored in case of a failure.
  • Replacements: If a module fails, replace it immediately to ensure that the network remains operational.

Detail Description

  • Manufacturer: Cisco Systems, Inc
  • Type: Networking
  • Sub-Type : Network Module
  • Manufacturer Part Number: NM-1A-OC3MM
  • Brand Name: Cisco
  • Product Name: Network Module
  • Product Type: Network Module


  • Interfaces/Ports: 1 x OC-3c/STM-1 WAN
  • Interfaces/Ports Details: 1 x SC Duplex Connector OC-3c/STM-1 WAN

Media & Performance

  • Connectivity Media: Multi-mode Fiber OC-3c/STM-1
  • Distance Support: 1.24 Mile Multi-mode Fiber
  • Data Transfer Rate: 155Mbps OC-3c/STM-1

Management & Protocols

  • Management:
  • CiscoWorks2000 and CiscoWorks network management integration
  • Enhanced setup configuration
  • Text-based command-line interface (CLI)
  • CiscoWorks2000 and CiscoWorks network management integration
  • Enhanced setup configuration
  • Text-based command-line interface (CLI)


  • Status Indicators:
  • Enabled - Network module is seated correctly and is communicating to the bus
  • RCLK - Carrier detect
  • FERF - Far end Rx failure
  • OOF - Out of frame error condition
  • AIS - Alarm indication
  • Enabled - Network module is seated correctly and is communicating to the bus
  • RCLK - Carrier detect
  • FERF - Far end Rx failure
  • OOF - Out of frame error condition

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.

Network Module

The network interface module integrates state-of-the-art designs with different hardware and software components for a completely flexible subsystem. The modules can work on several interfaces, and they are compatible with a wide range of networking devices. They provide services for the processing of events and access from related devices.

The network module can also run on central servers, depending on the network availability and resilience. Users can also distribute most of the module options to different sites for extra system resilience.

They help connect and transfer data between networking devices and the central server or controller. An ethernet cable and IP/TCP are employed for effective connection.

They deliver a great level of flexibility of deployment in data centers, branch offices, service providers, and more. Their integration into different switch and router families is seamless while offering quality and cost-effective solutions.

The network module options include tools that help manage and provide network nodes. The tools also assist in designing policies for applications. Users can configure the application policies in various sequences as needed. Software development kits and API are also available to enable flexibility of extension to custom environments.

A wide range of network interface modules is available for use. These include the management modules, which helps to control and monitor network communications. This range of products also provides users with more comprehensive remote monitoring and efficient configuration functions for real-time management.

The voice WAN Card is a flexible solution that supports multiple voices and data applications. This facilitates the movement of channeled voice and data for simplified deployment, sparing, and management.

The fabric module delivers value and offers support for advanced network connection. It enables enhanced network services without compromising performance. There are durable options that deliver outstanding bandwidth as well as improved performance and advanced services. These options are available in a wide range of port options ranging from 1 port to 20 ports and more.

Another reliable network module is the firewall. The firewall helps users filter the traffic that enters and leaves their private networks. Thus, there's adequate protection from viruses, hackers, and other threats. Firewalls are easy to use, often coming with only two options to allow or disallow network access. Therefore, users can be sure of the security of sensitive operational data.

Other network accessories ensure fast and effective transmission of data over the network. Some options transmit up to 40 Gigabit of data per second. Many options also work with a 10-100-1000 Mbps network for versatile business and personal use. These are robust, durable, and efficient network interface module options that users can only get at AllHDD.

Network Module Key Features

  • Controls the controllers at a single network site or across multiple network sites
  • Retains a subset of databases that are relevant to the network site being controlled
  • Communicates with the central server to discover and correct networking issues
  • Air-cooled with no moving parts for improved reliability and durability during application

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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:

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:

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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®
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Available throughout all 50 states

FedEx Standard Overnight®
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Available throughout all 50 states (Hawaii is outbound only)

FedEx Priority Overnight®
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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
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