Systems and methods for monitoring a call directed to a telephony network-based
voice messaging service (VMS) implemented using packet-switched data network telephone
conferencing resources, such as an IP-based voice-over-IP conferencing system.
The systems and methods use one or more media gateway systems providing an interface
between a conventional telephony domain and packet-switched data domain. When a
call is to be redirected to the VMS system, the telephony network routes the call
via the packet-switched data network using the media gateway. An application server
in the packet-switched data network maintains registration information associated
with the subscriber. If the subscriber is logged onto the packet-switched data
network, the conferencing resources are used to establish a conference call between
the caller, the VMS and the subscriber.
