signal_state_up
signal_state_up(dch, L1_SIGNAL_LOS_ON,
signal_state_up(dch, L1_SIGNAL_LOS_OFF,
signal_state_up(dch, L1_SIGNAL_AIS_ON,
signal_state_up(dch, L1_SIGNAL_AIS_OFF,
signal_state_up(dch, L1_SIGNAL_SLIP_RX,
signal_state_up(dch, L1_SIGNAL_SLIP_TX,
signal_state_up(dch, L1_SIGNAL_RDI_ON,
signal_state_up(dch, L1_SIGNAL_RDI_OFF,