Objective
Caller ID block allows the users phone number not to appear to the person they call. Anonymous call block prevents calls with unknown caller ID from ringing the IP phone. If the caller has set the phone to block caller ID, then the caller hears a busy signal or message when anonymous call blocking feature is enabled.
This document explains how to block caller ID and anonymous calls on Cisco SPA300 series IP Phones.
Applicable Devices
• SPA301 IP Phone
• SPA303 IP Phone
Block Caller ID
Configuration via star code
Step 1. Dial *67 followed by the phone number to block the caller ID.
Step 2. Dial *68 followed by the phone number to disable caller ID blocking.
Note: Caller ID block remains enabled for all calls until the user enters *68.
Anonymous Call Block
Configuration via star code
Step 1. To activate anonymous call block, enter *77.
Step 2. To deactivate anonymous call block, enter *87.
Note: Anonymous call block remains enabled until the user enters *87.
