Ensure that the Media Encryption Over IP? field on the system-parameters customer-options screen is set to y.
Procedure
On the SAT screen, type change ip-codec-set n, where n is the number corresponding to the codec set that you want to change.
In the Encrypted SRTCP field, type enforce-enc-srtcp. You can select the Best Effort option if you want Communication Manager to negotiate encrypted SRTCP capability between endpoints.
Note:
The default value for Encrypted SRTCP is enforce-unenc-srtcp. Endpoints earlier than Release 7.0 do not support encrypted SRTCP. Therefore, enforcing unencrypted SRTCP is preferable in networks that have Communication Manager Release 7.0 with earlier endpoints.
