GL-1
Glossary
5ESS: This is a digital switch used by many telephone companies and designed by AT&T. This switch provides both voice, data, and ISDN services and is capable of running either Custom or National ISDN
56 Kbps: The speed of an ISDN call when going between LATA boundaries without the use of
64 Kbps: The speed of an ISDN call when going between LATA boundaries with the use of
asynchronous: A method of data transmission in which data is sent at irregular intervals. Start and stop bits signal the beginning and end of a transmission.
autobaud: feature that automatically detects the baud rate of your computer’s serial port and matches the ISDN modem’s baud rate to that rate.
B channel: Bearer channel. A 56 Kbps or 64 Kbps ISDN channel which is used in both the Basic Rate Interface and Primary Rate Interface and carries a voice or data call. The 56 Kbps or 64 Kbps limitation depends on the use of
Bellcore: Bell Communications Research. Bellcore was part of Bell Laboratories before the breakup of AT&T and plays a leading role in developing ISDN standards.
BRI: Basic Rate Interface. An ISDN interface consisting of three full
duplex channels: two 64 Kbps B Channels and one 16 Kbps D Channel (2B+D). The 2B+D U Interface requires a single
CHAP: Challenge Handshake Authentication Protocol. A method of security which involves an exchange of encrypted passwords to verify the user.
