# Huawei Switch optical Monitors status of optical SFP modules. This check will monitor the *Temperature*, *Voltage* and *optical signal power* Check Info: ## Check Info *huawei_switch_optical*: * *service*: this check creates the service *Temperature* for each SFP with the interface name as the item * *state*: **critical**/**warning** if outside the limits * *wato*: upper and lower limits * *perfdata*: * Temperature in °C Sample output ![sample output](/doc/sample_as_info.png?raw=true "sample [SHORT TITLE]") ## Check Info *huawei_switch_optical.dom*: * *service*: this check creates the service *DOM* for each SFP with the interface name as the item * *state*: **critical**/**warning** if outside the limits * *wato*: not yet implemented * *perfdata*: * RX and TX signal power in dBm Sample output ![sample output](/doc/sample_interface.png?raw=true "sample [SHORT TITLE]") ## Check Info *huawei_switch_optical.voltage*: * *service*: this check creates the service *Voltage* for each SFP with the interface name as the item * *state*: **critical**/**warning** if outside the limits * *wato*: upper and lower limits * *perfdata*: * Voltage in Volt Sample output ![sample output](/doc/sample_peers.png?raw=true "sample [SHORT TITLE]")