Huawei OSN 3500 Technical Manual page 44

Operation, Maintenance and Management
5-2
interrupting service at other ports, or replacing board or disconnecting the
power supply.
Orderwire phone function is provided to ensure dedicated communication
channels for administrators at various stations.
By means of the NM system, the running and alarm status of the equipment at
all stations on the network are dynamically monitored.
Board software and host software can be upgraded and loaded on-line. Board
software and Flexible Programmable Gate Array (FPGA) supports remote
loading, and provides the functions of error prevention loading and breakpoint
continuous transmission.
With remote maintenance function, the maintenance personnel can remotely
maintain the OptiX OSN 3500 through PSTN when the equipment goes faulty.
The PDH processing board provides invasion pseudo-random code test
function which supports remote bit error test.
OptiX OSN 3500 TM - SD