Also, check line Framing (E1: CRC4 vs NCRC4) Possible reason are: line noise, corroded wires.etc. Is reported by the upstream end of the PHY (the wire between you and the switch) on the out-of-band management channel. This means the other end of the line received bad data from you. In this type of scenario also LOF and RED alarms will be triggered. When the equipment enters a Red-Alarm state, it returns a Yellow-Alarm back up the line of the received OOF. A typical scenario would be mis-configuration during the Sangoma card configuration (i.e selected CRC4 vs NCRC4). It is typical to have this alarm triggers in combination with 'Open Circuit' if there is an issue with the physical connection

You will also see the Rx Level either very low, or in a disconnected state: -36 -> -44. Check the health of the cable plugged into the port, as well as its connection to the port it is plugged into. If the onlyalarms indicating in the wanpipemon output is AIS:ON, then contact your telco with this information (RAI:ON can also be a possibility in this case as well) Example call diagram of the scenario: Sangoma card '-44'.Ĭabling issue. (Alarm Indication Signal): typicall know as a BLUE Alarm. all-ones signal transmission to the receivingequipment (the Sangoma card) to indicate that an upstream repeater (telco equipment) is in alarm, due to upstream transmission fault, either from another repeater or from the telco itself. If RAI and AIS alarms are not indicated, verify that you have selected the proper line framing (i.e T1: ESF, D4, E1:CRC4, NCRC4.etc) Raised after four consecutive frames with FAS error.

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