WHD-310(V)2 User Manual
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Figure 6.1.1 WZRDtalk Process
2. External Network Dialing
WZRDnet allows handsets to communicate with external Wide Area
Networks (WANs) by providing a mechanism to transfer voice or data to the
following external networks and utilities:
Public Switched Telephone Network (PSTN)
•
Analog voice communication via landline or mobile telephones.
Session Initiation Protocol (SIP) Phone
•
A signaling protocol to control voice communication over Internet
Protocol (IP). A SIP phone is a hardware-based or software-based
SIP user agent, that provides call functions such as dial, answer,
reject, hold/ unhold, and call transfer.
Instant Messaging (IM) Client
•
An IM client is a service that is based on either of the following real-
time communication protocols developed by the Internet Engineering
Task Force (IETF):
o
SIMPLE - Session Initiation Protocol for Instant Messaging and
Presence Leveraging Extensions.
o
XMPP - Extensible Messaging and Presence Protocol (XMPP)
which is an open source XML-based protocol.