3Com 3C63311 Reference Guide - Page 187

Managing System Alarms 175 Table 28 DS1/E1 UNI Module Alarms (continued) Alarm Meaning Troubleshooting Steps Port Missing ICP Cells Two consecutive ICP cells missing from the IMA frame. See also Loss of IMA Frame (LIF). This is a specific cause of that alarm and will also be reported. RFI IMA Remote Failure Indication: Far ATM Forum (R-121) end IMA Rx networking link state machines detected LOS, OOF, AIS. LCD, LIF or LODS. Correct T1 or E1 facilities error. Test Pattern Failed An 8-bit pattern is sent to the remote node which must then echo it back on all ports. The local node checks the echoed pattern and reports an alarm if cells from one or more of the links fail to arrive. This alarm is declared on all links which do not reply or reply incorrectly. Make sure that the same number of links are configured and enabled on both ends of the IMA configuration. Make sure that the configuration of both groups is the same. For instance, make sure that the payload scrambling setting is the same on both ends. Yellow Alarm OOF alarm is detected. A received remote alarm indication means that the far end equipment has a problem with the signal it is receiving from the PathBuilder device. Connect an external loopback cable to the port. If there are no alarms, the problem is elsewhere. Check for an open, short, or wiring error in the cable between the PathBuilder network interface port and your service provider's network interface unit, or the terminal equipment. An open transmit pair can cause this condition