Issue No. 03 - May/June (1999 vol. 3)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/4236.769426
<p>The central assumption of the plain old telephone service (POTS) was network-based computing power and dumb end systems. Implementing the pretty amazing new services (PANS) of IP-based telephony requires a shift in services at the network perimeter.</p>
P. Yang et al., "From POTS to PANS: A Commentary on the Evolution to Internet Telephony," in IEEE Internet Computing, vol. 3, no. , pp. 83-91, 1999.