NEC SL2100 Installation Manual - page 9
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P a g e
The following tables indicate the hard disk and partitioning requirements based on call volume, the disk
sizes specified are a minimum and can be exceeded if desired.
Up to 250 calls per hour or 10 concurrent calls
– 1 Hard disk can be used and should be
partitioned as below.
Partition Number
Function
Min Size
1
Operating System
100GB
2
Database
200GB
3
Temp
100GB
4
Audio
600GB
Up to 500 Calls per hour or 25 concurrent calls
– 3 Separate Hard disks should be used and
should be partitioned as below.
Disk Number
Partition Number
Function
Min Size
1
1
Operating System
100GB
1
2
Database
200GB
2
1
Temp
200GB
3
1
Audio
1TB
Over 2,000 Calls per hour or 100 concurrent calls
– 4 Separate Hard disks should be used and
should be partitioned as below.
Disk Number
Partition Number
Function
Min Size
1
1
Operating System
100GB
2
1
Database
200GB
3
1
Temp
200GB
4
1
Audio
1TB
Consideration should also be given for backing up calls, this can be done to either a local device on the
call recording server or to a UNC. The backups consist of a copy of the database and the associated
audio files, the backup destination will need to have sufficient disk space for this data.
A variety of codes can be used by the call recorder that offer different compression ratios for storage.
Using a codec with a high compression ratio will lower the quality of the recording, the available codec
are summarised in the table below. The default codes used is WMA38kbps which offers a good
compromise of quality and compression.
Codec
Size Per Minute
Size Per Hour
Hours in 1 GB Storage
Uncompressed
940KB
55MB
19 Hours
WMA24kbps
198KB
12MB
88 Hours
WMA38kbps
329KB
19MB
53 Hours
WMA48kbps
423KB
25MB
41 Hours
WMA64kbps
492KB
29MB
36 Hours
WMA128kbps
982KB
58MB
18 Hours
G.729
122KB
7MB
143 Hours
G.723_5300bps
83KB
5MB
211 Hours
G.723_6300bps
98KB
6MB
178 Hours
G.726_16kbps
239KB
14MB
73 Hours
G.726_24kbps
357KB
21MB
49 Hours
G.726_32kbps
474KB
28MB
37 Hours
G.726_40kbps
591KB
35MB
30 Hours
GSM
198KB
12MB
88 Hours