fone21k is a natural evolution of analog phone, merging it with packet infrastructure. It essentially bridges analog telephone line with mobile devices over IP network. Based on our iris3000 hardware combined with a low cost COTS high performance computer, it offers an exciting new way of using analog telephone line. With availability of our OPBX, any SIP client can be used to send and receive calls. This also opens up avenues for new and exciting applications such as smart door bells, global call forwarding etc.