Model: MTS200 (1U)
Doc. Ref. no. : - m08/om/201
Issue no.: 03
Page 143 of 195
User’s Manual
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T-Sync
Model MTS200 is available with NTP Utility software which can be used to synchronize
Windows PC as NTP client device. If NTP Utility software is used, there is no need to do regedit settings
in Windows PC for NTP client configuration.
NTP Client time accuracy depends on multiple factors such as Client local clock frequency ppm, network
load and congestion, type of clock synchronization algorithm in NTP Client devices other than Unix/Linux
PC, hierarchical arrangement of NTP servers and NTP clients in network and
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T-Sync
Model
MTS200 NTP Clock output accuracy during holdover conditions (when device is Unlock as per ppm of
internal clock crystal) etc.
Since NTP client sends NTP request to NTP server at fixed intervals which can be from few seconds to
minutes, as during the interval, time of NTP client depends on its own local clock ppm. If there is too
much network load and congestion, there is possibility that NTP request as well as NTP responses to and
fro from NTP clients to NTP servers can be delayed by significant milliseconds at irregular intervals or
NTP packets may be discarded by network (as NTP packet is UDP based transmission packet) since it
may cross packet TTL (Time To Live) value in network.
11.3.5 NTP Hierarchical Time Distribution:
NTP architecture model consists of number of primary reference sources, synchronized by wire or radio
clock. There are other several multiple secondary time sources/clients which are arranged in hierarchal
manner in network which request time from primary reference sources. Under normal circumstances it is
intended that the synchronization subnet of primary and secondary servers assumes a hierarchical-
master-slave configuration with the primary servers at the root and secondary servers of decreasing
accuracy at successive levels toward the leaves.
NTP Server-client architecture are generally arranged in hierarchical arrangement in network. Refer
below figure 11.3 to understand time distribution model in hierarchical arrangement.
