1. Introduction
Playing
Two methods of audio playback are supported by Net-Log in
conjunction with the Net-Log-Win software. Sections of
audio can be transferred to a file on the PC using the Play
Download function. These files can then be played using
Net-Log-Wins media file player. Alternatively, Play Stream
offers the ability to play audio direct from the Net-Log.
Archiving
Archive is an automated method of transferring audio data
from one or more Net-Logs to a designated PC via the
Network interface. When the audio data arrives at the PC, it
can be arranged into files of a predetermined size. These
files can then be copied to a removable media for long-term
storage. If temporary audio storage is required, to satisfy
broadcast authority requirements for example, then
Archiving may not be necessary as the large hard drives
used in Net-Log can, depending on the format or bit rate of
the recordings, hold several weeks of audio. Sections of the
audio could be downloaded as required using the Play
Download function. The Net-Log-Win software provides a
simple method of Archiving audio data for users with a
single Net-Log. For larger installations where multiple Net-
Logs are used, the Net-Log Auto-Archive package offers the
ability to archive audio data from up to 20 Net-Logs
simultaneously.
Network
The speed of the network connection on Net-Log is 10Mbps,
and the physical connection is made via a BNC connector for
coax cables, or a RJ45 connector for twisted pair cabled
networks. For maximum network performance, the Net-Logs
and client PCs’ should be linked via a network Switch. This
will cater for the Net-Logs’ 10Mb connection whilst allowing
the client PCs’ to run at 100Mb. In most applications, this
arrangement will provide sufficient network performance for
multiple clients to simultaneously access multiple Net-Logs.
However, on existing networks where network traffic is
already high, or where archiving audio from multiple Net-
Logs running at high data rates, the required bandwidth of
the network hardware needs to be carefully considered. In
such cases a dedicated network may be required. The
specification of the PC used as the Auto-Archive client will
also need to be able to handle the large amounts of audio
data being transferred. If the network hardware is incapable
of handling the required data rates, Play Stream will be
interrupted by periods of silence and audio data on the Net-
Log may be overwritten before it can be archived to the
target PC.
The following example illustrates a known working
configuration and provides a starting point when considering
larger systems.
5 Net-Logs each configured as follows:
4 mono channels of MPEG compression recording non-stop,
32 kHz sample rate, 192 kbps bit rate, archiving to a single
Auto-Archive client PC via a dedicated 10/100Mb Network
switch. The Auto-Archive client PC is an Intel PIII, 1GHz or
equivalent fitted with a 100Mb network card.
This system provides sufficient bandwidth for continuous
archiving plus the capability for additional Net-Log-Win
clients to Play Stream audio.
Figure 1.3 Multiple Net-Log Connection example
Sonifex Net-Log User Handbook
8
Summary of Contents for Net-Log
Page 1: ...Sonifex Net Log User Handbook...
Page 6: ...Contents Sonifex Net Log User Handbook...
Page 10: ...License Form Sonifex Net Log User Handbook 4...
Page 16: ...1 Introduction Sonifex Net Log User Handbook 10...
Page 24: ...3 Net Log Set up Installation Sonifex Net Log User Handbook 18...
Page 32: ...5 Recording Sonifex Net Log User Handbook 26...
Page 36: ...6 Playing Downloading Sonifex Net Log Win User Handbook 18...
Page 48: ...9 Serial Control Interface Sonifex Net Log Win User Handbook 30...
Page 56: ...11 The Administrator Sonifex Net Log Win User Handbook 38...
Page 62: ...13 Technical Specification Sonifex Net Log Win User Handbook 44...
Page 64: ...14 Glossary Sonifex Net Log Win User Handbook 46...