Vidicode 1370 LS120, Руководство пользователя

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Call Recorder Manual ©-2001 Vidicode Datacommunicatie BV
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switchboard at some central point. The switchboard determines the
beginning and the end of the recording via the external contact.
If there is
no external contact the recorder is activated when people speak on the
line, and de-activated when nothing has been said for some time.
1.2 Capacity of the Recorder
The Call Recorder can be set to operate seven different audio compression
techniques. The standard quality is meant for storage of telephone calls, and
is comparable in quality to GSM; it is the one most often used by our
customers.
In those cases where the quality of the recordings is of special importance, it
is possible to set a lower compression factor; the advantage is a significant
gain in quality, the disadvantage a lower storage capacity. When only
telephone conversations are being recorded, little is gained because the
quality of the telephoneline itself is a limiting factor. High quality will make a
difference, however, when one is recording a meeting, for instance.
It is also possible to set a higher compression factor to raise the storage
capacity. The highly compressed G.723 Low Rate still offers an acceptable
recording quality though to most listeners it will be obvious that this is highly
compressed audio.
The various compression techniques are interchangeable. All you need to do
is change the settings prior to recording. When the recordings are played, the
recorder will recognize the compression method used.
The table below gives an overview of the capacity of every model dependant
on the compression method used.
No. 1390
hard disk
No. 1391
hard disk No. 1380
flash
memory No. 1382
flash
memory No. 1370
LS120
floppy
Digitalk
(standard) 1950 hours 3900 hours 4 hours 8 hours 31 hours
G.729 2080 hours 4160 hours 4,5 hours 9 hours 33 hours
G.728 1040 hours 2080 hours 2,25 hours 4,5 hours 16,5 hours
G.723
High Rate 2500 hours 5000 hours 5,5 hours 11 hours 41,5 hours
G.723
Low Rate 3145 hours 6290 hours 6,5 hours 13 hours 50 hours