Farallon Communications 412, 612 manual GL-4 Netopia Isdn Modem User’s Guide

GL-4 Netopia ISDN Modem User’s Guide

SPID: Service Profile ID. This is an alphanumeric string provided by your telephone company that uniquely identifies the services 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 Transport 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 service 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 intervals in which data is sent.

terminal adapter: A device that converts 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 Interface. This is the interface 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 converts transmission rates from a range of 50 bps–19.2 Kbps to the B channel’s 56 Kbps or 64 Kbps.