CNS Service Suspension due to the replacement of the core network devices (Dec. 7)
(Released: November 14th, 2025)
CNS network devices will be replaced according to the end of the lease term. Therefore the network will be shutdown on the dates scheduled below so please take care.
Period: from 10:30am to 19:30pm, December 7th (Sunday), 2025. Several outages lasting approximately 1 to 2 hours each
Subject: All SFC (including NMC building, Junior & Senior High School)
Content: Replacement of CNS core network devices
Affected: All SFC-CNS services will be unavailable due to temporary loss of connectivity to and from SFC (Device login, CNS email sending/receiving, CNS authentication roaming, SFC official website, SOL-A, Physical Education System, etc.)
Note: Emails received during this period will be delivered with a delay.
Subject: All SFC (including NMC building, Junior & Senior High School)
Content: Replacement of CNS core network devices
Affected: All SFC-CNS services will be unavailable due to temporary loss of connectivity to and from SFC (Device login, CNS email sending/receiving, CNS authentication roaming, SFC official website, SOL-A, Physical Education System, etc.)
Note: Emails received during this period will be delivered with a delay.
We apologize for any inconvenience this may cause, but we ask for your understanding and cooperation to ensure the stable operation of CNS.
Last-Modified: November 14, 2025
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