Farallon Communications 612 - Manual (Page 156)

GL-4 Netopia ISDN Modem User’s Guide
SPID: Ser vice Profile ID. This is an alphanumeric string provided by
your telephone company that uniquely identifies the ser vices
required by the Netopia ISDN Modem. Depending on the type of
switch you are connecting to, you may have one, two, or no SPIDs.
SS7: Signaling System 7. An out-of-band signaling network required
for 64 Kbps end-to-end connectivity between Local Access Transpor t
Area (LATA) boundaries. Without SS7, an ISDN call would be limited
to 56 Kbps.
switch: A general term describing telephone company equipment in
a central office that directs calls to the appropriate destination.
ISDN-capable switches include the DMS-100 or 5ESS.
switched 56: A circuit-switched ser vice that allows 56 Kbps
communications, generally for the price of a voice call.
synchronous: A method of data transmission that is controlled by a
master clock. The clock establishes the inter vals in which data is
sent.
terminal adapter: A device that conver ts digital signals for use with
ISDN equipment.
T-1: A digital connection with a maximum throughput of 1.5 Mbps.
T-1 lines are often used to connect LANs.
Terminal Endpoint Identifier (TEI): A unique number used to identify
B channels so they can be linked together using Multilink PPP.
TCP/IP: Transmission Control Protocol/Internet Protocol. A family
of protocols developed for the reliable interchange of computer
information between any two addressable computers residing on
the Internet. It creates the appearance of a dedicated wire between
the two applications.
U Interface: User Inter face. This is the inter face provided by the
telephone company to which you connect your Netopia ISDN
Modem. It consists of two wires (one pair) and carries no voltage or
dialtone.
V.120: A rate adaption scheme that conver ts transmission rates
from a range of 50 bps–19.2 Kbps to the B channel’s 56 Kbps or
64 Kbps.