# [NPC_SNK_UNKNOWN_SIGNAL](https://apps.juniper.net/syslog-explorer/?msg=NPC_SNK_UNKNOWN_SIGNAL)

## SYSLOG Details
- **Message**: <variable>function-name</variable>: Unknow XM signal(<variable>signal-number</variable>) control
- **Help**: Unknown xm signal control
- **Description**: RESET and RESET PLL signals are only supported signals
- **Type**: Internal: Internal log message
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: function-name
signal-number
- **Facility**: LOG_PFE

## Found this message in the following releases:
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=NPC_SNK_UNKNOWN_SIGNAL&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=NPC_SNK_UNKNOWN_SIGNAL&sw=Junos%20OS&rel=23.4R1)