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Teledex IP250D User’s Guide SIP/MGCP Part Number 600-0480-601
INTRODUCTION TO THE IP250D
1 Introduction to the Teledex IP250D VoIP Network Terminal
The Teledex IP250D VoIP network terminal is very similar to a modern business desk
telephone. Instead of using telephone lines, it connects to the office network in the same
manner as computers and printers do. The acronym VoIP means Voice over Internet
Protocol. The voice and control signals to and from the IP250D are entirely digital data
that is transmitted over the office data network, rather than phone lines.
1.1 THE IP250D WORKS LIKE A TELEPHONE
The IP250D functions in a manner very similar to a modern office telephone that is
connected to a PABX (private automatic branch exchange.) In this user’s guide, the
IP250D VoIP network terminal will sometimes be referred to as a “phone.”
FIGURE 1.1 – THE IP250D KEYSET