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Status POWER SUPPLY STATE This field indicates which types of power supplies are installed (AC or DC) in Card A and Card B and gives their current state. Condition Description Normal The power supply is fully operational. Error The controller card cannot communicate with the power supply. Power Low The power supply output level is abnormally low. Power Fail The power supply input power is lost. Charger Fail The battery backup charger has failed or has lost its AC connection. Battery Low The battery backup has reached a critical energy point at which it may be unable to supply the unit with sufficient power to maintain operation. Temp High The power supply card temperature is abnormally high. Temp Critical The power supply card temperature is so high that it will soon shut off completely. SYSTEM STATE The system state fields display information regarding the two controller cards. The following sections describe these fields in detail. Alarm This field displays what type (if any) of system alarm is currently recognized by the unit. The condition is displayed until it clears up, 61200659L1-1 MX2800 STS-1 User Manual Chapter 4. Status with the exception of the SWITCHED condition (which is cleared manually). To clear the SWITCHED condition, select ACKNOWLEDGE ALARMS (ACO) or push the ACO button on the front panel. See the sections ACO Buttons on page 2-12 and Acknowledge Alarms (ACO) on page 4-12 for more information. Possible alarm types are listed in the following chart: Condition Description Supply Failure A power supply card has failed. Card Failure A controller card is not passing data. Excessive Switches The MAX SWITCHING THRESHOLD has been exceeded. See Max. Switch Threshold on page 3-6. Switched A card switch has occurred. Card A/Card B These fields display the current state of the two controller cards. Possible states for the controller cards are listed in the following chart: Condition Description Not Installed No controller card is installed in this slot. Stand By The controller card is ready to pass data, but is currently acting as a backup card. Active The controller card is acting as the primary card. Failure The controller card has failed and needs to be replaced. MX2800 STS-1 User Manual 61200659L1-1 Chapter 4. Status Protection This field lists the type of protection mode currently active. Possible states are listed in the following chart: Condition Description Network Both controller cards are installed and everything is functioning properly. The unit is in full Network Protection Mode. Circuit Unit is in Circuit Protection Mode and everything is functioning properly, or unit is in Network Protection Mode and a failure on the network has occurred. None One controller card is installed, or the unit is in Circuit Protection Mode and the secondary card has failed. For more information on the different types of Protection Modes, see Chapter 7, Circuit and Network Redundancy. Card Comm This field displays the current state of the communication link between the two controller cards. OK indicates that the cards are communicating; FAILURE indicates that the cards are not able to communicate with each other. If there is only one card installed, NON-REDUNDANT is displayed. 61200659L1-1 MX2800 STS-1 User Manual Chapter 4. Status TIMING STATUS The following entries describe the state of the transmit timing subsystem, including the status of the selected reference clock(s), availability and status of the external clock sources, timing acquisition status, and internal clock failures. Clock Status This entry describes the condition of the clock synchronization circuitry. The clock status can be any of the following values: • NORMAL – clock synchronization is operating normally. • RECOVERING – clock synchronization is in the process of recovering from a fault. • LOSS OF SOURCE – the reference clock source has become invalid • OUT OF RANGE – the clock synchronization circuit is unable to track the reference source. • OUT OF LOCK – the clock synchronization circuit is unable to lock to the reference source. Current Source Indicates the source of the clock. The values for the clock source are: • LOOP – indicates that timing is currently being derived from the STS-1 receive signal. • PRI EXT – indicates that timing is currently being derived from the source assigned to the primary external clock source. • SEC EXT – indicates that timing is currently being derived from the source assigned to the secondary external clock source. • FREE-RUN – indicates that transmit timing is currently being derived from an internal +/-20 ppm (Stratum 4) SONET minimum clock source. MX2800 STS-1 User Manual 61200659L1-1 Chapter 4. Status • HOLDOVER – indicates that a failure in the selected clock sourc has occurred and the unit has entered hold-over mode. In this mode, the last known good clock reference frequency will be held within 4.1 ppm for a minimum of 24 hours. PRI Ext. Clock The PRI EXT Clock alarms indicate when a failure con...

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