Customizing Standard Features
Enabling Call Features
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 62
3
Encryption Methods for a Secure Call
SPA IP Phones provide two ways to secure a call:
STEP 1 Navigate to Admin Login > Advanced > Voice > SIP
STEP 2 Under SIP Parameters, configure SRTP Methods.
Options:
x-sipura—legacy SRPT method
s-descriptor—compliant with RFC-3711 and RFC-4568
To enable x-sipura type of secure call through mini-certification:
STEP 1 Obtain the Generate Mini-Cert tool from your service provider.
STEP 2 Navigate to Admin Login > advanced > Voice > Ext_n.
STEP 3 Under
Subscriber Information, enter the Mini Certificate and the SRTP Private
Key that provide secure encryption of RTP streams between two endpoints on an
extension.
STEP 4 To enable the secure call service, navigate to Admin Login > advanced > Voice >
Phone.
STEP 5 Under Supplementary Services verify that Secure Call Serv is set to yes. (This
feature can also be configured in the User tab under Supplementary Services.)
Secure Call Indication Tone
This tone is played when a call that has been successfully switched to secure
mode. It should be played only for a short while (less than 30 seconds) and at a
reduced level (less than -19 dBm), so it does not interfere with the conversation.
To configure the tone, navigate to Admin Login > advanced > Voice > Regional.
Under Call Progress Tones, enter the tone string in the Secure Call Indication Tone
field. Defaults to 397@-19,507@-19;15(0/2/0,.2/.1/1,.1/2.1/2). See Scripting for
Cadences, Call Progress Tones, and Ring Tones for syntax information.
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