Vidicode Call Recorder Isdn Manual

							 
 
 
 
 
 
 
 
Call Recorder ISDN 
Manual
 
 
 
 
 
VIDICODE Datacommunicatie BV  
POBox 7164   
2701 AD  Zoetermeer 
The Netherlands 
Tel. +31 79 3617181         
Fax +31 79 3618092 
www.vidicode.nl 
[email protected] 
  
						

							 
                 
                 Call Recorder ISDN Manual - ©2001 - Vidicode Datacommunicatie BV
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Contents 
1 INTRODUCTION ..................................................................................7 
1.1 CONNECTING TO RECORD CALLS 8 
1.2 MIXING, COMPRESSION AND CAPACITY 8 
1.3 THE NETWORK INTERFACE AND COMPATIBILITY 9 
1.3.1 Network Protocol  9 
1.3.2 PC Compatibility  9 
1.4 S
ECURITY 10 
1.5 SOME TERMINOLOGY 11 
2  INSTALLING THE CALL RECORDER ..............................................13 
2.1 UNPACKING 13 
2.2 CONNECTING THE CALL RECORDER 13 
2.2.1  Connecting the power supply  14 
2.2.2  Connecting the S0 buses  14 
2.2.3  Connecting external loudspeakers (not compulsory)  14 
2.2.4  Connecting the microphone (not compulsory)  15 
2.2.5  Connecting to the LAN (not compulsory)  15 
2.3 T
URNING ON THE POW ER 16 
3  CONFIGURING THE CALL RECORDER..........................................19 
3.1 LOUDSPEAKER 19 
3.2 PLAYBACK VOLUME 20 
3.3 SPEECH COMPRESSION 20 
3.4 USE OF THE CRYPTOCARD 20 
3.5 THE CLOCK 21 
3.6 SETTING THE PASSW ORD 21 
3.7 SELECTING THE LANGUAGE 22 
3.8 OTHER CONFIGURATIONS 22 
4 OPERATING THE RECORDER ........................................................23 
4.1 RECORDING TELEPHONE CALLS 23 
4.2 RECORDING W ITH THE MICROPHONE 23 
4.2.1 Recording  24 
4.3 S
EARCHING FOR AND PLAYING OF TELEPHONE CALLS 25 
4.3.1  Searching for (Telephone) Recordings  25 
4.3.2  Playing the recording  28  
						

							 
                 
                 Call Recorder ISDN Manual - ©2001 - Vidicode Datacommunicatie BV
  4 4.3.3  The Function of the Recorder Keys Before and During Playback  28 
4.4 S
EARCHING FOR AND PLAYING MICROPHONE RECORDINGS 30 
4.4.1  Searching for microphone recordings  30 
4.4.2  Playing the microphone recordings  31 
4.5 T
HE DISK KEY 32 
4.6 THE MONITOR 33 
5 THE NETWORK INTERFACE ...........................................................35 
5.1 THE POSSIBILITIES 35 
5.2 CONFIGURATION 36 
5.3 USE OF THE NETW ORK INTERFACE 39 
5.3.1 The FTP protocol  39 
5.3.2 The monitor  40 
6  THE CRYPTO CARD OPTION ..........................................................41 
6.1 HOW A CRYPTO CARD W ORKS 41 
6.2 CHANGING THE CARD CODE 42 
6.3 RECORDING W ITH THE CRYPTO CARD 43 
6.4 PLAYING RECORDINGS WITH THE CRYPTO CARD 43 
7 ERASING RECORDINGS ..................................................................45 
8 MAINTENANCE .................................................................................47 
8.1 CHANGING THE DISK DRIVE 47 
8.2 CHANGING THE BATTERY 47 
9 ACCESSORIES ..................................................................................49 
10 GUARANTEE CONDITIONS ..........................................................51 
11 ADDITIONAL INFORMATION ........................................................53 
12 INDEX..............................................................................................55 
 
  
						

							 
 
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1 Introduction 
The Call Recorder ISDN is an audio recorder that has been specially designed to 
record telephone conversations from ISDN basic connections (S0 buses). There 
are models for 1, 2 and 4 S0 buses which are technically virtually the same. A 
Call Recorder ISDN has certain special features: It can record from 1 to 4 ISDN 
buses and from 1 microphone.  It records digitally 
•  It starts and stops recording automatically (or manually for microphone 
recordings)  
•  It archives the recordings to facilitate searching 
•  It highly compresses recordings, resulting in a large storage capacity 
•  It can interface with computers and networks using the Ethernet interface and 
TCP/IP protocol with the built-in FTP server 
•  It comes with a chip card (IC Card) reader to safeguard security     
A Call Recorder is configured to record simultaneously from the signal sources 
present:      
•  2 recordings per S0 bus, i.e. 8 recordings at the same time        
•  1 recording from a microphone     
 
The total number of recordings it can make simultaneously is therefore 9.   
The recordings are stored on an internal hard disk. The storage capacity is 
expressed in the number of hours of recording time with standard compression.  
There are 5 different types of Call Recorder:        
Art. 1490   Call Recorder ISDN 1xS0 2 calls, 2600 hours 
Art. 1492   Call Recorder ISDN 1xS0 2 calls, 5200 hours  
Art. 1494   Call Recorder ISDN 2xS0 4 calls, 5200 hours   
Art. 1496   Call Recorder ISDN 2xS0 4 calls, 7800 hours   
Art. 1498   Call Recorder ISDN 4xS0 8 calls, 7800 hours  
  
The capacity can be increased or decreased by setting different compression 
methods. The capacity is at its lowest when the recorder is set to not use 
compression and the ISDN signal is stored mixed but is otherwise unchanged. 
The capacity at this setting can be calculated by dividing the capacity indicated 
above by a factor of 7.5. 
  
						

							 
                 
                 Call Recorder ISDN Manual - ©2001 - Vidicode Datacommunicatie BV
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1.1  Connecting to Record Calls  
A Call Recorder ISDN can be used in various ways: 
1.  As a desktop machine that 
usually records one’s own calls. 
The smallest type, ISDN1, is 
most commonly used for this 
purpose. The advantage of this 
way of using it is that the 
recordings are always available 
at one’s own desk.  
2.  As an appliance between the 
ISDN network-lines and the 
telephone exchange, and which 
records all external calls of a 
firm. In this case one of the 
bigger versions, ISDN2 or 
ISDN4, would usually be more 
appropriate. The advantage of 
this method of connecting is that 
the calls of all the phones in a 
company are recorded and that each individual one can be recognized.    
1.2  Mixing, Compression and Capacity 
A Call Recorder ISDN applies two methods to efficiently store the ISDN signal. 
First the incoming and outgoing signals are mixed digitally, which results in a 
digital recording of the same quality as the original signal. Every recording is then 
compressed by a factor of 7.5. The resulting compressed recording is 
theoretically of a lower quality, but any difference with the original is difficult to 
hear. 
Based on the experience gained with the thousands of Call Recorders  already 
delivered, it can safely be said that the standard compression applied to 
telephone calls is fully satisfactory. 
If the quality of the recordings is especially important, it is possible to set a lower 
compression factor; the advantage is a significant gain in quality, the 
connected between the network lines and the 
telephone exchange  
						

							 
 
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disadvantage a lower storage capacity. W hen only telephone conversations are 
being recorded, little is gained because the quality of the telephoneline itself is a 
limiting factor. Less compression, resulting in a higher quality, will make a 
difference, however, when one is recording a meeting via a microphone. 
High and low compression can be interchanged. It is sufficient to change the 
setting prior to recording. The recorder will recognize the compression method 
used when the recordings are being played  
The maximum number of recordings that can be stored in the recorder having a 
hard disk is 300,000 for all models, which means there are no practical 
restrictions. 
W hen  the hard disk is approaching its full capacity, the recorder will give a 
warning signal well in time for the user to check if there are any objections to the 
oldest recordings being overwritten.  
1.3  The network Interface and Compatibility 
All Call Recorders ISDN (as well as the analog models you might come across) 
have been provided with an Ethernet interface. The purpose of this interface is to 
exchange recordings with computers and networks.  
1.3.1  Network Protocol   
The Call Recorder ISDN uses TCP/IP as network protocol. The recorder can be 
seen as an FTP server with only a root directory. If necessary, a system manager 
can alter the configuration of the Call Recorder via the Telnet protocol. It is 
possible to exchange files both on local area networks and via wide area 
networks and Internet. The network is used in combination with the optionally 
available Call Recorder Archive software. This standard interface also makes it 
possible for a third party to supply applications. 
1.3.2 PC Compatibility 
Call Recorder recordings can be played via the loudspeakers of a PC. If no 
compression has been applied almost any PC with a sound card will be able to 
play the recordings. After compression this is no longer possible and special 
software is needed to play the files.  
						

							 
                 
                 Call Recorder ISDN Manual - ©2001 - Vidicode Datacommunicatie BV
  10  The optionally available Call Recorder Archive Software makes it possible to play 
direct from standard compression (CRF file format) and is also able to export 
these recordings without loss of quality to the relatively efficient format ADPCM 
(.W AV) which can be played on every PC. If compressed files are sent to a third 
party, they can be listened to with the help of a freeware program provided 
especially for this purpose by Vidicode. It can be found on our website 
www.vidicode.nl
. 
1.4 Security 
The user can protect access to the recorder by means of a code. This will prevent 
others from listening to recordings on the recorder. Access from the network has 
also been secured by means of codes.              
Security with codes is less safe than security with Crypto Cards, available as an 
option. Crypto Cards also offer a watertight security if the Call Recorder is stolen, 
or when recordings are sent via the Internet. Without the correct card and the 
pincode that goes with it it is impossible to listen to the recordings.