Netopia Network Adapater manual Appendix a Glossary

User Guide

Appendix A Glossary

The Glossary defines acronyms, keywords and definitions used in this user guide.

A1	Acronyms
	VOIP ATA		Analog Telephony Adaptor
	FXO	Foreign Exchange Office
	FXS	Foreign Exchange Subscriber
	PSTN	Public Switched Telephone Network
	PTM	Packet Telephony Module
	RTP	Real-time Transport Protocol
	SIP	Session Initiation Protocol
	STUN	Simple Transversal of UDP through NAT
	UA	User Agent
	VoIP	Voice over Internet Protocol
A2	Keywords
	Caller		Call Originating End is called the Caller.
	Callee		The Call Terminating End is called the Callee.
	Transferor		The End transferring the call.
	Transferee		The End being transferred.
	Transfer Target		The End to whom the transferee is being transferred.

A3 Definitions

CPE Customer Premises Equipment: This specifies equipment on the customer, or LAN, side.

CRC Cyclic Redundancy Checking: A method for checking errors in a dVoIP ATA transmission between two computers. CRC applies a polynomial function (16 or 32-bit) to a block of dVoIP ATA. The result of that polynomial is appended to the dVoIP ATA transmission. Upon receipt, the destination computer applies the same polynomial to the block of dVoIP ATA. If the host and destination computer share the same result, the transmission was successful. Otherwise, the sender is notified to re-send the dVoIP ATA block.

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