Aethra avc500 Mode D'Emploi

Page de 97
 
 
Length of AES Key (ISDN only)  
From this drop-down menu you can choose (for ISDN connections only) three AES key lengths:  
•  128 bits 
•  192 bits  
•  256 bits 
•  <Auto> (allows optimal choice according to the characteristics of the terminals negotiating the 
videoconference session.) 
 
Note: For an IP connection, the key length is always 128 bits. 
 
Length of Prime DH Number Key (ISDN Only) 
The encryption protocol requires the simultaneous exchange of a prime number and an AES private key between terminals. 
For H.320 calls you can choose between two prime number lengths: 
•  High Security (length 1024 bits) 
•  Very High Security (length 1536 bits) 
 
Note 
For IP calls, the System always uses the High Security option with a 1024-bit length. 
Most common video communication terminals normally use the High Security prime number length and the 128-bit AES 
private key. 
Licenses 
From the Home Page select: 
1. SETTINGS 
2. INSTALLATION 
3. LICENSES 
 
This page is dedicated to supplementary functions not offered by default. In order to obtain information on the activation of 
these functions, please contact your system supplier.  
 
To insert a licence key by means of the remote control: 
1.  Enter the licence key. 
2.  Press the “Enable Licence” icon. 
 
Possible options with licence keys, on different systems: 
a.  ISDN connections up to 768Kbps 
b. PRI 
connections 
c.  NIC (X.21, V.35, RS.449, RS.530, RS.366) connections 
d. G.703 
connections 
e. MCU. 
f. Dual 
Video 
 
 
47