Nortel 1110 User Guide

Page of 632
 Features overview
 Page 499 of 630
IP Phones
Description, Installation, and Operation
IP Phone 1140E
IP Phone 1150E
For information about configuring the SRTP media encryption feature, see 
the applicable IP Phone section.
Note 1: During a firmware upgrade, the SRTP media encryption feature 
will be automatically disabled.
Note 2: The SRTP media encryption feature does not support duplicate 
media streams encryption, such as IP Call Recording.
Note 3: It takes as a few seconds at the beginning of the call for security 
to be established. As a result, the first few seconds of the call can 
sometimes be unsecured; once the security icon appears, the call is 
secure.
Note 4: SRTP media encryption does not work with codecs which have 
small payloads, such as 10ms G.729.
For more information about SRTP, see System Security Management 
(NN43001-604)
.