Multi-Tech Systems 7600 ユーザーズマニュアル
Introduction
ION 7500 / ION 7600 User’s Guide
Page 348
Time Synchronization & Timekeeping Technical Note
Introduction
Time synchronization signals are broadcast periodically over the network; each
meter continually assesses its ability to remain synchronized with the incoming
broadcasts. Over a brief period, each meter learns how its internal timing differs
from that of the broadcast source and adjusts its timekeeping to compensate. Very
accurate time synchronization is achieved with this method.
meter continually assesses its ability to remain synchronized with the incoming
broadcasts. Over a brief period, each meter learns how its internal timing differs
from that of the broadcast source and adjusts its timekeeping to compensate. Very
accurate time synchronization is achieved with this method.
Meters at modem sites are synchronized each time they are connected. The longer
the duration between connections, the larger the error in time synchronization. In
the extreme case, this can result in missing or duplicated logs. If this occurs, you
can increase the frequency of connections: install GPS receivers at the remote sites,
or arrange for a direct ION software connection.
the duration between connections, the larger the error in time synchronization. In
the extreme case, this can result in missing or duplicated logs. If this occurs, you
can increase the frequency of connections: install GPS receivers at the remote sites,
or arrange for a direct ION software connection.
It is important that only one method of time synchronization be used on each
network. If multiple methods are used, the timestamps will differ for the sites and
devices using separate time synchronizing methods.
network. If multiple methods are used, the timestamps will differ for the sites and
devices using separate time synchronizing methods.
Before you configure time synchronization on your network, you should
familiarize yourself with the Clock module settings. Once you have done this, you
can decide which synchronization method you want to use.
familiarize yourself with the Clock module settings. Once you have done this, you
can decide which synchronization method you want to use.
N
OTE
Time Synchronization is disabled by default with ION Enterprise. In order to use time synchronization with
an ION device, the feature must be enabled from the ION Management Console for that device. Refer
to “Enabling or Customizing Time Synchronization” on page 351 for instructions.
an ION device, the feature must be enabled from the ION Management Console for that device. Refer
to “Enabling or Customizing Time Synchronization” on page 351 for instructions.