Interphase Tech RAS Communications Controller 5536 - Manual (Page 235)

Glossary
5536 PRI RAS Communications Controller Users Guide 215
SPID (Service Profile IDentifier) ‹ An alphanumeric string that
uniquely identifies the service capabilities of an ISDN terminal. This
is an identifier that points to a particular location in the Telco's central
office switch memory where relevant details about the device are
stored. Each BRI connection can have up to two SPIDs, one for each
B channel.
SS7 (signalling System 7) ‹ This is a common channel signalling
system used to establish ISDN call functions.
SVC (Switched Virtual Circuit) ‹ Used in packet data networking
technology. Temporary virtual circuit between two users.
Switch Type ‹ The type of equipment that the telephone company
uses to provide you with ISDN service.
Synchronous Data Link Control (SDLC) ‹ A discipline conforming
to subsets of the Advanced Data Communications Control Procedures
(ADCCP) of the American National Standards Institute (ANSI) and
High-level Data Link Control (HDLC) of the International Organiza-
tion for Standardization.
Used for managing synchronous code-transparent, serial-by-bit infor-
mation transfer over a link connection. Transmission exchanges may
be duplex or half-duplex over switched or nonswitched links. The con-
figuration of the link connection may be point-to-point, multi-point, or
loop.
Contrast with binary synchronous communication.
Synchronous transmission ‹ A data transmission scheme where the
interval between transmitted characters is fixed so that start and stop
bits are not required. In contrast with asynchronous transmissions, syn-
chronous transmissions are guaranteed a specific percentage of band-
width on the network medium.
TCP/IP (Transmission Control Protocol/Internet Protocol) ‹ Proto-
col for internetwork routing and reliable message delivery. TCP/IP
functions at the 3rd and 4th layers of the Open Systems Interconnec-
tion model.
IP is the low level protocol for the TCP/IP protocol set. IP provides
packet delivery services between nodes. On the same level as IP are
ARP and RARP.
TCP is a reliable stream-delivery, virtual circuit connection-oriented
protocol that runs on top of IP. Telnet, FTP, and login use TCP connec-
tions.