Paradyne 3800PLUS manual Glossary-7

Glossary

Originate mode	The modem is in a state where it is ready to transmit a call. In a dial network, it is the
	modem that makes the call. In a leased-line network, it is one of two sides of the network
	that is selected to be the originating modem.
parity	A way of checking data accuracy by counting the number of bits that have a value of
	one.
PBX	Telephone switching equipment (Private Branch Exchange) dedicated to one customer. A
	PBX connects private telephones to each other and to the public dial network.
permissive interface	A dial modem operating mode characterized by a fixed output power level of ±9 dBm.
physical address	The diagnostic address of a control modem derived from its location in the carrier: its
	carrier and slot number.
power-up self-test	A test that checks most hardware components when the modem is powered-on.
product code	A three-digit code indicating the modem's highest VF data rate.
protocol	The rules for timing, format, error control, and flow control during data transmission.
PSTN	Public Switched Telephone Network. A network shared among many users who can use
	telephones to establish connections between two points. Also known as dial network.
pulse dialing	One of two dialing methods, in which telephone numbers are sent as pulses (brief
	changes in voltage or current intensity) across the telephone line. Rotary telephones use
	pulse dialing.
register	A part of the modem's memory that contains values that determine the modem's
	operating characteristics.
Remote	A branch of the Top-Level menu that permits access to the DCP of another modem.
remote loopback	A test that sends a signal to the remote modem to test the local modem, the remote
	modem, and the circuit between them.
remote mode indicator	An inverse video that indicates the modems are operating in Remote mode.
result code	An asynchronous message (in either numbers or words) that the modem sends to the
	DTE after executing or trying to execute a command.
Return to Dial	A function available when in Dial Backup mode that allows the modem to switch to
	dial-line operation when currently on leased lines.
RJ11C	A type of 6-position jack normally used with permissive dial networks and telephone
	sets.
RJ21X	A type of 50-position jack normally used with permissive dial networks providing the
	appropriate conductors for up to eight telephone lines.
rotary	A TELCO service whereby multiple lines to a customer premise share a common
	telephone number.
RS-232D	An Electronic Industries Association's standard defining the 25-position interface
	between data terminal equipment and data communications equipment.

3980-A2-GB30-20 November 1996 Glossary-7