Cisco SPA501 User Guide - Page 48
Configuring Privacy and Security, Blocking Caller ID, Blocking Anonymous Calls
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Using Advanced Phone Features Configuring Privacy and Security 4 Configuring Privacy and Security Blocking Caller ID You can block Caller ID from your phone so that your phone number does not appear to the person you call. Using the Setup button: STEP 1 Press the Setup button. STEP 2 Select Preferences. STEP 3 Choose Block Caller ID and press edit. STEP 4 Press y/n to choose yes (enable) or no (disable). STEP 5 Press ok. STEP 6 Press save. Using the star code: Press *67 before dialing the number. (Caller ID blocking will remain enabled until you enter *68.) Blocking Anonymous Calls Blocking anonymous calls prevents calls with unknown Caller ID from ringing your phone. (For example, if a caller set his phone to not display Caller ID, the call is considered anonymous.) These callers receive a busy signal or message. Using the Setup button: STEP 1 Press the Setup button. STEP 2 Select Preferences. STEP 3 Choose Block Anonymous Call and press edit. STEP 4 Press y/n to choose yes (enable) or no (disable). STEP 5 Press ok. Cisco Small Business SPA50X and SPA51X Series SIP IP Phone User Guide 48