Frequently Asked Questions

Click on the category to browse FAQs.
  • Configuration Issues (1)

    Configuration issues, saving, backup, factory default, etc.
  • E1, T1, DS1 Link issues (3)

    Link issues for TDM devices
  • ERPS (1)

    Ethernet Ring Protection Switching or ERPS is an effort at ITU-T under G.8032 recommendation to provide sub-50ms protection and recovery switching for Ethernet in a ring topology.
  • Fiber Link Issues (2)

    Common issues that users experience with our media converters and switches.
  • Forgot Password (6)

    Explains the recovery procedures if management password is forgotten.
  • FXO-FXS Fiber Converters (1)

    POTS over fiber converters work in a niche application and can come in handy when extending telephone voice over a longer physical distance than cannot be provided by copper wire. Airports, campuses, malls, military, highway, all have applications were normal POTS needs to go over a fiber link. CTC Union has a single channel and a four channel device in the FRM220 family as well as module cards used in TDM multiplexers. Some frequently asked questions are included here.
  • IP-Mux (CESoETH) (2)

    A series of FAQs that will help troubleshoot and fix issues when using IP-Mux Series.
  • PoE Issues and Questions (1)

    IEEE802.3af/at comes with some "Gotchas." While PDs must support BOTH Mode A and Mode B to be compliant with the 802.3af/at standard, there is no such requirement for PSEs. There are a few different ways this can lead to mistakes.
  • Unable to Boot (2)

    All of our managed Ethernet switches utilize a dual image flash, which in most cases allows full recovery of the device.
  • VLAN Configuration (4)

    Most users that refer to the user manual or check the online help (click the question mark in the upper right of web page) will figure out the settings they need. But here, we have placed some real case examples with settings.

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