Call waiting using external notification and presence detection

摘要

Alerting an intended recipient of a phone call includes identifying an account based on a phone call received from a caller and accessing configuration data related to the account. The configuration data is used to identify an identity associated with the ccount. One or more external online service provider systems are queried across a network to determine whether the identity is available to receive an electronic communication associated with the phone call. The electronic communication associated with the phone call is sent across the network to the one or more external online service provider systems conditioned on whether the identity is determined to be available to receive the electronic communication. The one or more external online service provider systems send the electronic communication to the identity.