NM-CEM-4SER Cisco 4 Ports Network Module Refurbished

The NM-CEM-4SER Cisco 4 Ports Expansion module is a network module designed to provide additional serial connectivity to Cisco 2800, 3800, 2900, and 3900 series routers. Here are the key design features of this expansion module:

• Compact size: The NM-CEM-4SER expansion module is a compact and lightweight module that easily fits into the network module slot of Cisco routers. Its small size makes it ideal for deployment in branch offices, remote sites, and other locations with limited space.
• Four serial ports: The expansion module provides four additional serial ports that support asynchronous communication at speeds of up to 115.2 kbps. This provides reliable and flexible connectivity options for a wide range of devices and applications.
• High-speed data transfer: The expansion module supports High-Level Data Link Control (HDLC), Point-to-Point Protocol (PPP), and Frame Relay protocols, allowing for high-speed data transfer between connected devices. This ensures efficient data transmission and reduces the likelihood of network congestion.
• Compatibility: The NM-CEM-4SER expansion module is compatible with Cisco 2800, 3800, 2900, and 3900 series routers, providing seamless integration with existing network infrastructure.
• Plug-and-play functionality: The expansion module has plug-and-play functionality that eliminates the need for complex software installation and configuration. The module can be easily installed and configured using the Cisco IOS command line interface (CLI).
• LED indicators: The expansion module has LED indicators that provide visual status information on the module's activity and connectivity. This allows for easy monitoring and troubleshooting of the module's performance.

The performance of the NM-CEM-4SER Cisco 4 Ports Expansion module can be evaluated based on the following factors:

• Data transfer rate: The expansion module supports asynchronous communication at speeds of up to 115.2 kbps, which ensures high-speed data transfer between connected devices. The data transfer rate can be evaluated by testing the module's throughput under different network conditions and comparing it with the expected performance.
• Compatibility: The NM-CEM-4SER expansion module is compatible with Cisco 2800, 3800, 2900, and 3900 series routers. The compatibility can be evaluated by testing the module's interoperability with different router models and verifying its seamless integration with existing network infrastructure.
• Reliability: The expansion module provides reliable connectivity options for a wide range of devices and applications. The reliability can be evaluated by testing the module's stability under different network conditions and verifying its ability to handle large volumes of data traffic.
• Ease of installation and configuration: The NM-CEM-4SER expansion module has plug-and-play functionality that eliminates the need for complex software installation and configuration. The ease of installation and configuration can be evaluated by testing the module's ability to quickly and easily integrate with the router's existing software environment.
• LED indicators: The expansion module has LED indicators that provide visual status information on the module's activity and connectivity. The LED indicators can be evaluated by testing their accuracy and reliability in providing real-time status information on the module's performance.

The NM-CEM-4SER Cisco 4 Ports Expansion module is primarily designed to provide additional serial connectivity to Cisco routers, and as such, it does not have any security features of its own. However, it is important to note that the module is designed to be used in conjunction with Cisco routers that have robust security features built-in.

Here are some of the security features that can be used in conjunction with the NM-CEM-4SER expansion module to ensure the security of network data:

• Access control: Cisco routers have access control features that allow network administrators to define access policies that control who can access the network and what resources they can access. These access control features can be used to limit access to the serial ports provided by the expansion module.
• Authentication: Cisco routers support a range of authentication protocols, including Password Authentication Protocol (PAP), Challenge Handshake Authentication Protocol (CHAP), and Remote Authentication Dial-In User Service (RADIUS). These protocols can be used to ensure that only authorized users are able to access the network and the devices connected to it.
• Encryption: Cisco routers support a range of encryption protocols, including Secure Sockets Layer (SSL) and Internet Protocol Security (IPsec). These protocols can be used to ensure that network data is encrypted and secure from unauthorized access.
• Firewall: Cisco routers have built-in firewall features that can be used to block unwanted traffic and protect the network from external attacks. These features can be used to protect the serial ports provided by the expansion module from unauthorized access and attacks.

General Information

• Manufacturer: Cisco Systems, Inc
• MPN: NM-CEM-4SER
• Product Name: 4-Port Serial CEoIP Network Module
• Product Type: Network Module
• Device Type: Expansion module
• SKU: NM-CEM-4SER

Technical Information

• Application/Usage: Data Networking

Interfaces/Ports

• Interfaces/Ports Details: 4 x Synchronous Serial

Media & Performance

• Maximum Data Transfer Rate: 2 Mbit/s

Dimensions & Weight

• Height: 1.6 Inch
• Width: 7.1 Inch
• Depth: 7.2 Inch

Miscellaneous

• Additional Information-
• Optional serial control lead transport
• Optional extended serial control lead support
• Configurable serial control lead sampling
• Serial control lead programming
• Optional data strobe configuration
• Configurable clock mode for each port
• Configurable clock source for each port
• Asynchronous data support with over-sampling
• Emerging standards-based CEoIP based on Vainshtein draft with enhancements
• Configurable using Cisco IOS software
• Interworking between the T1/E1 and serial network modules
• Bit-transparent data transport
• Protocol-independent data transport
• IP transport using Real-Time Transport Protocol (RTP) and UserDatagram Protocol (UDP) protocol stack
• Configurable payload size
• Optional payload compression
• Optional data protection
• Adaptive clock synthesis
• Configurable egress de-jitter buffers up to 500 milliseconds
• Configurable idle pattern
• Overall network module status LEDs
• Per-port status LEDs

Compatibility-

• Cisco 2610XM-2651XM
• Cisco 2691
• Cisco 2811, 2821, 2851
• Cisco 3660
• Cisco 3725 , 3745
• Cisco 3825, 3845