NEC DTL-6DE-1 - DT310 - 6 Button Display Digital Phone User Manual page 251

STEP 4: After the Web Programming Login screen is displayed, close the Internet browser.
Note: Make sure to perform the logout operation after the data setting of the telephone.
Note: When 15 minutes have passed leaving the PC without operation after log in to Web Programming, you
are forcibly logged out from the Web Programming.
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