NM-4T Cisco 3600 Serial Module - 4 Ports

Highlight Cisco NM-4T 4-Port Serial Module

The Cisco NM-4T 4-Port Serial Network Module is engineered to deliver reliable wide-area connectivity for enterprise and branch office environments. Designed for modular Cisco routers, this versatile module enhances WAN performance and supports multiple synchronous serial interfaces for diverse networking applications.

General Information

• Manufacturer: Cisco Systems
• Part Number: NM-4T
• Device Category: Network Expansion Module

Technical Specifications

• Port Count: 4 synchronous serial interfaces
• Connector Type: DB-60 serial connectors
• Supported Protocols: HDLC, PPP, Frame Relay
• Aggregate Throughput: Up to 8 Mbps
• Per-Port Speed: Maximum of 8 Mbps
• Duplex Mode: Full duplex communication
• LED Indicators: Module status, transmit (TX), receive (RX), and port activity
• Hot Swappable: Not supported
• Form Factor: Cisco NM standard module
• Power Source: Supplied by router chassis
• Software Management: Cisco IOS CLI
• Operating Environment: Enterprise WAN and branch office deployments

WAN Technology Support

• Leased Line connectivity
• Frame Relay services
• PPP protocol support
• HDLC transmission

Cable Compatibility

• DB-60 Serial Cables
• Supports V.35, RS-232, RS-449, X.21, EIA-530 standards via appropriate cabling

Compatibility and Integration

Supported Cisco Router Platforms

• Cisco 2600 Series Modular Routers
• Cisco 2600XM Series Routers
• Cisco 3600 Series Routers
• Cisco 3700 Series Routers

Cisco NM-4T 4 Ports Serial 3600 Series Module Overview

The Cisco NM-4T 4 Ports Serial 3600 Series Module is engineered to provide robust serial connectivity for enterprise and service provider networks. This module integrates seamlessly into Cisco 3600 Series routers, delivering flexible WAN connectivity options that support mission-critical applications. Its design emphasizes scalability, reliability, and compatibility with diverse networking environments, ensuring that organizations can extend their infrastructure with confidence.

Port Configuration and Interface

The NM-4T module features four high-speed synchronous serial ports, each capable of supporting a wide range of WAN protocols. These ports are designed to accommodate multiple interface cables, enabling compatibility with standards such as V.35, RS-232, RS-449, X.21, and EIA-530. This versatility allows network administrators to tailor connectivity to specific requirements without compromising performance.

Data Transmission and Speed

Each port supports data rates up to 2 Mbps, ensuring efficient transmission across WAN links. The module is optimized for synchronous communication, which enhances reliability and minimizes latency. By supporting multiple encapsulation types, including HDLC and PPP, the NM-4T ensures interoperability across heterogeneous networks.

Integration with Cisco IOS

The NM-4T is fully compatible with Cisco IOS software, enabling advanced routing, security, and management features. This integration allows administrators to configure WAN links with granular control, implement quality of service policies, and monitor performance metrics in real time. The synergy between hardware and software ensures that the module delivers consistent and predictable results.

Enterprise WAN Connectivity

Enterprises rely on the NM-4T module to establish secure and reliable WAN connections between branch offices, data centers, and headquarters. Its ability to support multiple serial standards makes it ideal for organizations with diverse legacy systems. By consolidating connectivity into a single module, enterprises reduce complexity and streamline network management.

Service Provider Deployments

Service providers utilize the NM-4T to deliver leased line services to customers. The module’s flexibility in supporting different interface types ensures compatibility with customer premises equipment. Providers can leverage its reliability to maintain service-level agreements and deliver consistent performance across wide geographic areas.

Integration with Legacy Systems

Many organizations continue to operate legacy systems that require serial connectivity. The NM-4T provides a bridge between these systems and modern IP networks, enabling gradual migration without disrupting operations. Its support for multiple encapsulation protocols ensures smooth interoperability during transitional phases.

Cisco Router Platforms

The NM-4T is specifically designed for the Cisco 3600 Series routers, including models such as the 3620, 3640, and 3660. These routers provide modular expansion slots that accommodate the NM-4T, allowing organizations to customize their configurations based on evolving requirements.

Extended Series Integration

Beyond the 3600 Series, the NM-4T can also be deployed in compatible platforms that support network modules. This ensures investment protection and provides flexibility for organizations that operate mixed environments.

Software Compatibility

The NM-4T requires Cisco IOS versions that support synchronous serial interfaces. Administrators can leverage IOS features such as access control lists, routing protocols, and traffic shaping to optimize WAN performance. The module’s compatibility with IOS ensures seamless integration into existing network architectures.

High Availability Features

The NM-4T is engineered for reliability, with features such as error detection, loopback testing, and diagnostic capabilities. These features enable administrators to identify and resolve issues proactively, minimizing downtime and ensuring continuous service availability.

Scalability and Flexibility

With four independent serial ports, the NM-4T provides scalability for growing networks. Organizations can expand connectivity incrementally, adding new links as needed without replacing existing infrastructure. This flexibility supports long-term growth and adaptation to changing business needs.

Security Integration

By leveraging Cisco IOS security features, the NM-4T supports secure WAN communications. Administrators can implement encryption, authentication, and firewall policies to protect data in transit. This ensures compliance with industry standards and safeguards sensitive information.

Branch Office Connectivity

Organizations with multiple branch offices can deploy the NM-4T to establish dedicated WAN links. These links provide reliable communication channels for voice, video, and data traffic. The module’s compatibility with diverse serial standards ensures that branches with different infrastructure can connect seamlessly.

Data Center Integration

Data centers utilize the NM-4T to connect to external networks, enabling secure and high-speed communication with remote sites. Its support for synchronous protocols ensures efficient data transfer, which is critical for applications such as backup, replication, and disaster recovery.

Government and Military Applications

Government and military organizations often require secure and reliable WAN connectivity for mission-critical operations. The NM-4T’s robust design and compatibility with secure protocols make it suitable for these environments. Its ability to integrate with legacy systems ensures continuity of operations during modernization initiatives.

Form Factor and Installation

The NM-4T is designed as an internal router network module, installed in the expansion slots of Cisco 3600 Series routers. Its compact form factor ensures efficient use of space while providing robust connectivity options. Installation requires powering down the router, ensuring safe integration into the system.

Connector Types

The module utilizes high-density 60-pin connectors, which interface with various serial cables. These connectors provide secure and reliable connections, minimizing the risk of signal loss or interference. The use of standardized connectors ensures compatibility with a wide range of equipment.

Environmental Requirements

The NM-4T is designed to operate within standard environmental conditions, including temperature and humidity ranges specified by Cisco. Its durable construction ensures reliable performance in diverse environments, from office settings to industrial facilities.

Protocol Support

The NM-4T supports a wide range of WAN protocols, including Frame Relay, X.25, and leased line services. This versatility enables organizations to deploy the module in diverse networking scenarios, ensuring compatibility with existing infrastructure and service provider offerings.

Diagnostic and Monitoring Tools

Administrators can leverage diagnostic tools such as loopback testing and error counters to monitor performance. These tools provide valuable insights into link quality and help identify potential issues before they impact operations. The ability to perform remote diagnostics enhances efficiency and reduces maintenance costs.

Quality of Service Integration

By supporting Cisco IOS QoS features, the NM-4T enables administrators to prioritize traffic based on application requirements. This ensures that critical applications such as voice and video receive the necessary bandwidth, while less critical traffic is managed appropriately.

Investment Protection

The NM-4T provides investment protection by enabling organizations to leverage existing serial infrastructure while transitioning to modern IP networks. Its compatibility with multiple standards ensures that organizations can continue to use legacy equipment without sacrificing performance.

Operational Efficiency

By consolidating multiple serial connections into a single module, the NM-4T reduces complexity and simplifies management. This enhances operational efficiency, enabling administrators to focus on strategic initiatives rather than routine maintenance.

Future-Ready Design

The NM-4T’s flexible design ensures that organizations can adapt to future networking requirements. Its support for diverse protocols and compatibility with Cisco IOS features provides a foundation for long-term growth and innovation.

Comprehensive Connectivity Solution

The Cisco NM-4T 4 Ports Serial 3600 Series Module stands as a comprehensive solution for organizations seeking reliable and flexible WAN connectivity. Its robust design, compatibility with diverse standards, and integration with Cisco IOS make it a valuable asset for enterprises, service providers, and government agencies alike.

Strategic Value for Organizations

By deploying the NM-4T, organizations gain a strategic advantage in managing their WAN infrastructure. Its scalability, reliability, and security features ensure that networks remain resilient and adaptable in the face of evolving challenges. The NM-4T embodies Cisco’s commitment to delivering innovative solutions that empower organizations to achieve their goals.