Status Code and Alarm Register (0x0) - 8.12 English - PG056

The summary alarm bit is identical to the stat_alarm bit on the Status and Alarm interface. It is set whenever any of the following conditions occur:

• If the SDI bit or the Reset bit is set in the Transmit CPRI Alarms register.
• Local Loss Of Frame (LOF), Loss of Signal (LOS), or Remote Alarm Indication (RAI) bits set. A local LOF or LOS results in the LOF or LOS bit being set in the transmitted Z.130.0 bits respectively. A local LOF or LOS also causes a local RAI which is returned in the transmitted Z.130.0 RAI bit.
• LOF, LOS, or RAI bit set in received Z.130.0. When any of these alarms are seen for the first time the core returns to carrying out L1 Synchronization and rate negotiation. If the alarm persists, a slave CPRI core can still become operational albeit with the summary alarm bit set. A master CPRI core also completes L1 synchronization and rate negotiation regardless of received alarms.

The Status Code indicates the current state of the core. It is identical to the stat_code port on the Status and Alarm interface. The status code ports are as follows:

0000: Reset

0001: Attempting L1 synchronization

0010: Protocol version setup

0011: C&M parameter setup

1011: Passive Mode

1110: Interface and vendor-specific negotiation

1111: Operational state: link is up