The NIM-2FXS/4FXOP (Network Interface Module) is a device used in Cisco Unified Communications Manager (CUCM) to connect analog phones and PSTN (Public Switched Telephone Network) lines to a digital IP-based telephony system.
The model provides 2 FXS (Foreign Exchange Station) ports and 4 FXO (Foreign Exchange Office) ports. FXS ports allow the connection of analog phones or other devices that require a "local loop" connection, such as a fax machine. The FXO ports are used to connect to PSTN lines, such as a traditional telephone line provided by a telephone company.
The "E/DID" in the product name refers to the ability of the FXS ports to support "E&M" signaling, which is used for PSTN trunks, and "DID" (Direct Inward Dial) service, which allows incoming calls to be routed directly to a specific extension without the need for an operator or receptionist to answer the call and transfer it.
The model module is intended to be installed in a Cisco router or switch that is running CUCM software. Once installed, the module will allow the CUCM system to interact with the analog phones and PSTN lines connected to it, allowing for full-featured IP telephony service.
Performance and Reliability
The performance and reliability of the model Network Interface Module will depend on several factors, including the specific hardware and software it is used with, as well as the network infrastructure and configuration.
In general, the model should provide good performance for voice calls. The FXS ports can provide power to the connected devices, and the FXO ports can support a wide range of PSTN line signaling types, allowing for a high degree of compatibility with different types of telephone systems.
The NIM-2FXS/4FXOP also supports various advanced features such as echo cancellation, noise reduction, and automatic gain control, which can improve the quality of the voice calls.
In terms of reliability, the model is typically a reliable module, as long as it is properly installed and configured, and that it is compatible with the other hardware and software in the system. It is also important to keep the model and the router or switch on which it is installed running the latest version of the software to ensure correct operation, performance and security.
It is recommended to have a proper maintenance plan for the device to ensure long term reliability and performance as well as regular monitoring on the interface to detect any issues promptly.
Resiliency and High Availability
Resiliency and high availability are important considerations when designing and implementing a communication system, and the model Network Interface Module can play a role in achieving these goals.
In terms of resiliency, the model can provide some level of redundancy by allowing for the connection of multiple PSTN lines through the FXO ports. In the event that one line goes down, calls can be routed over the remaining lines. Additionally, depending on how the system is configured, if the model module or the device in which it is installed experiences a failure, calls can be rerouted to another device.
To achieve high availability, one can take a more holistic approach that includes redundant hardware, power supplies, and network connections. This way, if one device or component fails, another can take over its duties without interruption. In addition, multiple NIM-2FXS/4FXOP modules can be installed in separate devices, this way if one device fails, the other will keep on providing service.
Cisco Unified Communication Manager (CUCM) provides several high availability options that you can use to improve system availability, such as the use of "hot standby" devices, where a secondary device is configured to take over the functions of a primary device in the event of a failure.
It's essential to note that, high availability and resiliency planning require a thorough understanding of the system requirements and a design that takes into account all possible failure scenarios. It's also a best practice to validate and test the high availability and resiliency design before deployment.
General Information about this Cisco NIM-2FXS/4FXOP
- Manufacturer: Cisco
- Part Number or SKU# NIM-2FXS/4FXOP
- Product Line: Cisco Network Interface Module
- Product Type: Expansion module
- Packaged Quantity: 1
Technical Information of Expansion module
- Total Number of Ports: 6
- Interfaces/Ports Details: 4 x FXO Network
- Interfaces/Ports Details: 2 x FXS/DID Network
- Form Factor: Plug-in module
- Connectivity Technology: Wired
- Network / Transport Protocol: RTP, RTCP
- Remote Management Protocol: SNMP
- Features: Management Information Base (MIB), Echo cancellation
- OS Required: Cisco IOS XE 16.5 and above
- Color Category: Silver
Compliant Standards for Network Interface Module
- KN22, CISPR 22, DR PTC220, EN 300 386 V1.6.1, EN61000-3-2:2006, TIA-968-B, VCCI, EN 55022:2010, AS/ACIF S002, CS-03, ICES-003 issue 5, CISPR 24
- Cisco Integrated Services Router 4221, 4321, 4331, 4351, 4431
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Other Available Categories For - Networking - Expansion Module
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