Call Recorder PRI ISDN manual ©Vidicode 2008
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storage capacity of the hard disk ensures the ability of the Call Recorder
ISDN of long term unattended recording.
Recordings are randomly accessible. The capacity of the hard disk is in
recording time at least 1380 hours uncompressed and 13800 hours with
compression and therefore it takes a long time before existing
recordings are wiped out by new recordings. The Call Recorder issues a
warning when the hard disk is getting full. If the warning is ignored the
oldest recordings will be overwritten by the newest.
Stored recordings can be accessed on PC’s via the LAN using the optional
Call Recorder Access System software.
You can copy recordings from the hard disk to CD if your Call Recorder
ISDN is equipped with a CD drive. Copying recordings to CD-recordable
can be done in different ways for different purposes. It is possible to
copy single recordings, copy a selection of recordings or automatically
copy all new recordings. Recordings on CD can be viewed and played
with the Call Recorder Quick CD Access System software that comes with
the Call Recorder ISDN with CD.
The Call Recorder ISDN allows the user to listen in to ongoing calls
through the internal speaker; this is called the Monitor function. The
volume of the internal speaker can be adjusted. The Call Recorder ISDN
also allows for the connection of a headset. The headset can be used to
monitor calls and to listen to recordings.
1.3
Speech Compression
Call Recorders ISDN that have compression facilities on board compress
recordings according to the G.723.1 format. G.723.1 compression has a
good balance between audio quality and recording size and can be
reproduced on most PC’s with Microsoft Windows versions. Compressed
recordings take up 1/10th of the size of uncompressed recordings.
Therefore the compression has a profound effect on the storage
capacity of the Call Recorder ISDN in terms of recording time.
Real time compression while recording many channels requires a lot of
extra processing power and therefore extra hardware in the form of
very fast processors. To save cost where a large recording database is not
needed, there is a model of the Call Recorder for primary rate without
the extra compression facilities. This model can only store at least 1380
hours of uncompressed audio on the hard disk. This model is for
applications that do not require long storage duration.
1.4
Network
The Call Recorder ISDN features an Ethernet interface. The Call Recorder
ISDN can be connected to a PC or computer network through the
Ethernet interface. With its own IP address the Call Recorder ISDN acts as
an FTP-server from which recordings can be downloaded using any FTP
Summary of Contents for Call Recorder ISDN
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