PLANET XGS3-24042 - Manual (Page 104)

XGS3 Command Guide
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Parameter:
<seconds> is the timeout value, the valid range is 5 to 3600s.
Default:
The system default timeout setting is 600 seconds.
Command mode:
Global Mode
Example:
Modify the timeout value to 60 seconds.
Switch#config
Switch(config)#tftp-server transmission-timeout 60