Samsung SMG-3200 - Manual (Page 83)

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6. Set a TOS value in consultation with your network administrator at the site.
TOS (Type Of Service) requests a router for a specific service to effectively
process voice packets (that are transmitted from the SMG-3200) on the
network. Refer to the definition of terms listed in the Appendix D for a full
description of TOS.
When you set TOS for the SMG-3200, you must set router to
support the TOS. You can configure TOS values, if necessary,
to process QoS (Quality of Service) regardless of whether
using a DHCP server or not.
7. A message asking whether to restart the system will be displayed as follows.
To restart immediately, type ‘y’ or type ‘n’ otherwise and press [Enter].
# System Configuration has changed. Restart? (y: Now, n: Later) ->
MAC Address
MAC Address is a fixed address that is allocated to a network
controller of the SMG-3200. It cannot be modified by users.