Nokia SERIES 30 Developer's Manual page 28

WSP
WTAI
WAP Service Developer's Guide for Nokia Series 30 Phones with WML Browser
use in specifying content and user interface for
narrowband devices, including cellular phones and
pagers.
Wireless Session Protocol. A layer of WAP stack, which is
optimized for low bandwidth bearer networks with long
latency.
Wireless Telephony Applications Interface. Feature that
provides the means to create telephony applications by
using a WAE user-agent with the appropriate WTAI
function libraries.
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