Description
Troubleshooting Common Module Issues
If you encounter issues with the NM-4T Cisco 3600 Series 4 Ports Serial Module, try the following troubleshooting steps:
- Check the module status LED lights: The module should have a green LED light indicating that it is properly installed and a yellow LED light indicating that it is active. If the LED lights are not on, check the module connection and power.
- Check the router configuration: Make sure that the router is configured to recognize the module and its interfaces. Verify that the correct interface type is selected in the configuration.
- Check the cable connections: Verify that the cables are properly connected to the module and that they are the correct type and length. Ensure that the cables are securely fastened and that there are no loose connections.
- Check the interface settings: Verify that the interface settings, such as the speed, framing, and line code, are configured correctly for the specific serial device you are connecting to. Check for any mismatches or errors in the configuration.
- Check for errors or logs: Use the show interface command to check for any errors or logs related to the module or its interfaces. Look for any error messages or drops in packets.
- Perform a loopback test: Perform a loopback test on each interface to check for physical connectivity issues. This involves connecting the transmit and receive pins of the interface with a loopback plug and sending a test signal through the interface.
- Upgrade the software: If none of the above steps resolve the issue, try upgrading the router software to the latest version. This may address any software compatibility issues or bugs related to the module.
Configuring the Serial Interfaces on the Module
To configure the serial interfaces on the NM-4T Cisco 3600 Series 4 Ports Serial Module, follow the steps below:
- Shut down the router and disconnect all cables.
- Locate the network module slot on the router and remove the blank faceplate from the slot.
- Carefully insert the module into the slot, aligning the connector with the slot.
- Push the module firmly into the slot until it clicks into place.
- Reconnect all cables to the module.
- Power on the router.
To configure the serial interfaces, follow the steps below:
- Log in to the router’s command-line interface (CLI).
- Enter the configuration mode by typing “configure terminal.”
- Enter the interface configuration mode by typing “interface serial [interface number]” (replace [interface number] with the number of the interface on the module that you want to configure).
- Configure the interface settings, such as the clock rate, bandwidth, IP address, subnet mask, and default gateway.
- Set up the line configuration settings, such as the encapsulation type, framing, and line code.
- Repeat steps 3-5 for each interface on the module that you want to configure.
- Save the configuration changes by typing “write memory.”
- Verify the configuration by typing “show interface” and “show interfaces status” commands.
Connecting Cables to the Module
To connect cables to the NM-4T Cisco 3600 Series 4 Ports Serial Module, follow the steps below:
- Shut down the router and disconnect all cables.
- Locate the network module slot on the router and remove the blank faceplate from the slot.
- Carefully insert the module into the slot, aligning the connector with the slot.
- Push the module firmly into the slot until it clicks into place.
- Connect the serial cables to the module’s serial ports. Each serial port is labeled 0/0, 0/1, 0/2, and 0/3.
- Use a console cable to connect to the router’s console port.
- Power on the router.
General Information
- Manufacturer: Cisco Systems, Inc
- Manufacturer Part Number: NM-4T
- Brand Name: Cisco
- Product Series: 3600
- Product Name: 3600 Series 4port Synchronous Serial Module
- Product Type: Network Module
Technical Information
- Application/Usage: Data Networking
- Interfaces/Ports Details: 4 x DB-60 Synchronous Serial WAN
- Maximum Data Transfer Rate: 2 Mbit/s
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