360-systems Image Server 2000 Manuel d'utilisateur télécharger pdf (Page 75)

Image Server 2000 Owner’s Manual Page 75

Network Time Protocol

Automatic Date/Time Updates

When using Image Server play-lists in broadcast applications, an accurate record is often needed of

what was played and when. The Image Server’s As-Run logging feature creates such a record, time

stamping each played clip using the machine’s internal date/time clock. Very accurate time

stamping can be achieved by synchronizing the server’s clock to an external time base that is

referenced to Coordinated Universal Time (UTC).

This is accomplished using the Network Time Protocol (NTP) to interrogate time servers through a

network connection. A time server could be an in-house computer that is equipped with a GPS

receiver, or a radio receiver locked to signals from the NIST radio station WWV. Alternatively,

public time servers may be used which are accessible through an Internet connection.

Connecting to the Network

To obtain automatic date/time updates from the public time servers on the Internet, you will need

to provide the Image Server with Internet access. Generally, Image Servers would be connected on

a secure high-speed local area network, with any Internet connection going through a router with

an integrated firewall. The Network Time Protocol uses TCP/IP port number 123, so be sure the

firewall is configured to allow access to this port per Figure 27.

Figure 27 - NTP Network Block Diagram

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 134 135

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360-systems Image Server 2000 Manuel d'utilisateur Page 75