System information

Telephony features 373
Media security
Media security normally shares keys using a secure UNIStim channel. In
situations where CS 1000 Release 5.0 or later is not available, you can
use Pre-Shared keys (PSK).
For CS 1000 Release 5.0 and later, the controlling Call Server provides all
of the keying material and control of the SRTP operation.
For CS 1000 Release 4.5 or earlier, the key is protected by a preshared
secret embedded in the IP Phone to generate and exchange encryption
parameters.
For more information about the Media Security feature, see Security
Management Fundamentals (NN43001-604).
The Media Security feature is supported on the following IP Phones:
• Phase II IP Phone 2001
•
Phase II IP Phone 2002
•
Phase II IP Phone 2004
•
IP Phone 2007
•
IP Phone 1110
•
IP Phone 1120E
•
IP Phone 1140E
•
IP Phone 1150E
•
IP Softphone 2050
• IP Phone 1210
•
IP Phone 1220
•
IP Phone 1230
ATTENTION
The IP Softphone 2050 supports media security for CS 1000 Release 5.0
and later. The IP Softphone 2050 supports UNIStim key (USK) SRTP media
encryption only.
Media security is not available on the IP Phones 1210, 1220, and 1230 for the
following payloads: G.711 10ms, G.723 10ms, and G.729 10ms
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 05.02 26 May 2009
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.