3Com ISDN Modem PAP, PPP, PRI, POTS, SPID, D channel, QuickSelect, National ISDN, Network terminator (NT1), Plain old telephone service

4GLOSSARY

National ISDN

An ISDN standard that enables consistency in ISDN service features across different vendors’ equipment and switches for North America.

Network terminator (NT1)

A device that terminates the ISDN line. The NT1 is built into the 3C882 ISDN modem.

PAP

Password Authentication Protocol. PAP is one of two PPP authentication protocols; CHAP is the other. An authentication protocol requests information to verify a valid user. PAP requests the user’s name and password for verification.

POTSPlain old telephone service.PPP

Point-to-Point Protocol. PPP provides a standard method of transmitting data through the Internet. PPP is used for communication between a computer and an Internet service provider.

PRI

Primary Rate Interface. A PRI line is one of two access methods to the ISDN. In North America, each PRI consists of twenty-three 64 Kbps B channels and one 64 Kbps

D channel.

QuickSelect

A built-in feature that automatically detects and uses the protocol required for each digital call: V.120 or Async-Sync PPP.

SPID

Service Profile Identifier. If required, this number is supplied to you by the telephone company. Typically, if your ISDN line has only one telephone number, a SPID is not required.