
1 Introduction
The Call Recorder is a digital audio recorder that can simultaneously record
from 4 or 8 analog telephone lines or 4 or 8 mono audio-sources. The Call
Recorder is designed for continuous unattended recording. Recording is
started and stopped automatically for each individual call. The quality of
recordings is ensured by the Automatic Gain Control, which evens the
recording levels of the local and remote voice. When recording from other
audio sources voice activated recording starts and stops recording
automatically. The Call Recorder also has connections for start/stop
switches.
The Call Recorder has an internal hard disk, a network interface and an
optional CD writer. All recordings are stored digitally on the internal hard
disk. The large storage capacity of the hard disk ensures the Call Recorder's
ability of long term unattended recording. Other advantages are that
recordings are randomly accessible and that there is no risk of wiping out
existing recordings 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
archived using the optional Call Recorder Archiving System software. It is
also possible to copy recordings from the hard disk to CD if your Call
Recorder has that option. 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 continuous copy new
recordings automatically. Recordings on CD can be viewed and played with
the Call Recorder Quick CD Access System software that comes wih the
Call Recorder.
The digital format of the recordings is determined by the use of speech
compression. The Call Recorder compresses recordings default according to
the G.723 High Rate format. G.723 High Rate compression has a good
balance between audio quality and recording size and is compatible for most
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 in terms of recording time.
The Call Recorder features an Ethernet interface. The Call Recorder can be
connected to a PC or computer network through the Ethernet interface. With
its own IP address the Call Recorder acts as an Ftp-server from which
recordings can be downloaded. The Call Recorder Access System software
can be used to connect to the Call Recorder over the network to retrieve
recordings from the Call Recorder and archive the recordings on the PC.
The Call Recorder Access System software has extensive archiving
capabilities including the creation of special archives suited for backup on
CD. A special version of the Call Recorder Access System allows for fax
image recovery of recorded fax transmissions. The Ethernet connection also
Call Recorder manual © Vidicode 2005 11