ZyXEL Communications IES-1248-51 User Manual (English)

Other manuals for ZyXEL Communications IES-1248-51

Questions and Answers:

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Anthony FoxAug 21, 2025
How to fix ZyXEL Communications Modem if SYS or PWR LED does not turn on?
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  Elizabeth JacksonAug 21, 2025
  If the SYS or PWR LED on your ZyXEL Communications Modem doesn't turn on, first ensure the power wires are properly connected to both the power supply and the modem itself, and that the power supply is working correctly. Verify you're using the correct power source as specified. If the issue persists, the LED or the unit itself may be defective, and you should contact your vendor.
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Ronald LaneAug 25, 2025
What to do if ALM LED is on ZyXEL Communications Modem?
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  Arthur AlexanderAug 25, 2025
  If the ALM LED is on, use the statistics monitor command to identify the alarm's cause. If overheating is the issue, ensure the ZyXEL Communications Modem is in a well-ventilated area, with no obstructions around it, and away from other equipment's exhaust. Confirm the fans are working by checking for a low buzz and airflow. If voltage levels are out of range, capture a screenshot of the statistics monitor command display and contact your vendor.
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Maria LopezAug 26, 2025
Why Ethernet port’s LED is on, but data cannot be transmitted with my ZyXEL Communications Modem?
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  Jonathan DennisAug 27, 2025
  If the Ethernet port LED on your ZyXEL Communications Modem is lit but data transmission fails, verify the Ethernet port has the correct mode setting. Also, ensure that the modem's IP settings are properly configured. Finally, check the VLAN configuration.
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frankrothAug 27, 2025
How to troubleshoot SFP LNK LEDs that do not turn on ZyXEL Communications Modem?
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  Stacey WilsonAug 28, 2025
  If the SFP LNK LEDs on your ZyXEL Communications Modem do not turn on, verify that the Ethernet port’s mode is set to match that of the peer Ethernet device. Check the cable and connections between the SFP slot and the peer Ethernet device. Also, inspect the mini GBIC transceiver. Ensure the peer Ethernet device is functioning correctly. If the issue persists, the SFP slot may be faulty, and you should contact the distributor.
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Cassidy JonesAug 31, 2025
How to fix SNMP manager server if it cannot get information from ZyXEL Communications Modem?
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  lisabryantAug 31, 2025
  If the SNMP manager server cannot retrieve information from the ZyXEL Communications Modem, ping the modem from the SNMP server to check connectivity. If the ping fails, verify the cable, connections, and IP configuration. Ensure the community (or trusted host) setting in the modem matches the SNMP server’s community. If configured, confirm that your computer’s IP address matches a configured trusted host IP address.
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Lisa GrahamSep 1, 2025
Why is there no voice on an ADSL Connection with ZyXEL Communications Modem?
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  Christopher DavisSep 1, 2025
  If there is no voice on an ADSL connection with your ZyXEL Communications Modem, ensure the subscriber has a POTS splitter properly installed. Check the ADSL line pin assignments. Verify the telephone wire connections between the subscriber and the MDF(s), between the MDF(s) and USER port(s), and between the MDF(s) and the CO connector(s). Also, check the connection from the MDF(s) to the telephone company or the PBX. Verify the telephone wire mapping on the MDF(s). Make sure the in-house wiring works and is connected properly. If problems persist, repeat these steps using a different ADSL port.
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Caitlyn HallSep 3, 2025
How to save configured settings on ZyXEL Communications Network Router?
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  Brian WardSep 3, 2025
  To save the settings of your ZyXEL Communications Network Router IES-1248, use the “config save” command after you finish configuring.
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Lindsay CurtisSep 6, 2025
What to do if there is no voice on an ADSL connection on ZyXEL Communications Network Router?
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  Robin BennettSep 6, 2025
  If you experience no voice on an ADSL connection with your ZyXEL Communications Network Router, ensure the subscriber has a POTS splitter properly installed. Check the ADSL line pin assignments. Check the telephone wire connections between the subscriber and the MDF(s), between the MDF(s) and USER port(s), and between the MDF(s) and the CO connector(s). Also, check the connection from the MDF(s) to the telephone company or the PBX. Verify the telephone wire mapping on the MDF(s), and ensure the in-house wiring works and is connected properly. You can repeat these steps using a different ADSL port.
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kcollierSep 7, 2025
Why 100/1000 Ethernet port data transmission is not working on ZyXEL Communications Network Router?
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  Alex AlvarezSep 7, 2025
  If the 100/1000 Ethernet port on your ZyXEL Communications Network Router is not transmitting data, ensure the Ethernet port has the appropriate mode setting and that the IES-1248’s IP settings are properly configured. Also, check the VLAN configuration.
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Richard WilliamsSep 9, 2025
Why Telnet is not working on ZyXEL Communications Network Router?
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  mendozajohnSep 9, 2025
  If you are unable to telnet to your ZyXEL Communications Network Router, ensure that the number of current telnet sessions does not exceed the maximum allowed number (five). Verify that your computer’s IP address matches a configured secured client IP address (if configured), as the IES-1248 will disconnect the telnet session if it doesn't match. Confirm that you have not disabled the Telnet service or changed the server port number. Ping the IES-1248 from your computer; if you can ping but still cannot telnet, contact the distributor. If you cannot ping, check the cable, connections, and IP configuration. Incorrectly configuring the access control settings may lock you out from using in-band management; try using the console port to reconfigure the system.