Cisco SPA509G Administration Guide - Page 137

Configuring Security, Quality, and Network Features Ensuring Voice Quality 5 STEP 3 Click the Phone tab. STEP 4 In the Supplementary Services section, under Secure Call Serv, choose yes. STEP 5 Click Submit All Changes. NOTE This feature can also be configured from the User tab, under Supplementary Services. Users can enter *18 to Secure Next Call-Uses encrypted media for the next outbound call (on this call appearance only). This star code is redundant if all outbound calls are secure by default. The phone can be configured for secure provisioning using the factory-installed security certificate. To determine if the Client Certificate is installed on the phone: • SPA50XG: Press the Setup button and select Product Info. Scroll to Client Cert. • SPA525G/525G2: Press the Setup button and select Status. Select Product Information. Scroll to Certificate. • WIP310: Log in to the configuration utility. In the Info tab, under Product Information, certificate information is listed in the Client Certificate field. Secure Call Indication Tone This tone is played when a call 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. You can configure it on the Regional web page under Call Progress Tones. Defaults to 397@-19,507@-19;15(0/2/0,.2/.1/1,.1/2.1/2) Ensuring Voice Quality Voice quality perceived by the subscribers of the IP Telephony service should be indistinguishable from that of the PSTN. Cisco IP phones support several codecs. See: • "Supported Codecs" section on page 137 • "Bandwidth Requirements" section on page 138 Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 136