Establishing a network connection. In one aspect, establishing a network
connection includes: establishing a connection across a first communication network
that carries audio signals; encoding a computer network address for a specified
network different from the first network into an encoded network address and sending
the encoded network address across the first network; and using the network address
to establish a network connection on the second network. In one implementation,
network connectivity functionality of a computer can be automatically accessed
using telephone connectivity. Out-of-band signaling provides a spontaneous network
collaboration capability by sending an Internet protocol ("IP") address across
a public switched telephone network ("PSTN") connection.
