Workgroup Remote Access Switch 425LED I NDICATORSAlarm LEDs (PRI Only)• LOF (loss of frame)Also known as a red alarm.Lights up when layer 1 has detected a qualified loss of frame condition (excluding AIS).A loss of frame condition occurs when signals are still being received by the switch, but the1200 can not detect the frames in the receive path.If you have just installed your CyberSWITCH and you are seeing LOF, there may be amismatch between the configured framing mode (for example, SF or ESF) and the framingmode of the incoming data.• LOS (loss of signal)Also known as a red alarm.Lights up when layer 1 has detected a loss of signal.LOS occurs when the CyberSWITCH sees no incoming signal at all.2. RAI sent from CSU IntermediateDevice(CSU)1. Bad Signal sent to CSUPOWER SERVICE TX RX 10BASE - TLAN B-CHANNELS E1 ONLYB2 B4 B6 B8 B26 B28B22 B24B18 B20B14 B16B10 B12 B30 L1B1 B3 B5 B7 B25 B27B21 B23B17 B19B13 B15B9 B11 B29 B31E1D T1D2. No signal sent back from CSULOS detected IntermediateDevice(CSU)1. Signal sent to CSUPOWER SERVICE TX RX 10BASE - TLAN B-CHANNELS E1 ONLYB2 B4 B6 B8 B26 B28B22 B24B18 B20B14 B16B10 B12 B30 L1B1 B3 B5 B7 B25 B27B21 B23B17 B19B13 B15B9 B11 B29 B31E1D T1D
