Interphase Tech iSPAN User Manual
Page 227
iSPAN Serial WAN Adapter Users Guide
207
RAI (Remote Alarm Indication)
◆
PRI alarm, also known as Yellow
signal. This alarm indicates a carrier failure.
RBOC (Regional Bell Operating Company)
◆
This refers to the origi-
nal seven regional telephone companies created by the AT& T divesti-
ture: Nynex, Bell Atlantic, Bell South, Southwestern Bell, US West,
Pacific Telesis and Ameritech.
RD (Received Data)
◆
RS-232 (V.24) data signal, sent from the data
communications equipment to the data terminal equipment on pin 3.
(See
REN (Ringer Equivalence Number)
◆
A standard requirement of the
FCC. For devices such as a telephone or answering machine. The REN
requirement can be found on a label on the bottom of the analog
device.
Repeater
◆
Device that acts as an amplifier. Also known as a Line
Extender. This device is needed when the distance between the phone
company's Central Office and your premises exceeds distance or dB
loss limits.
RFC (Request for Comment)
◆
IETF (Internet Engineering Task
documents that contain proposed standards and specifications.
RFCs can be either approved, or simply archived as historical recom-
mendations.
RI (Ring Indicator)
◆
RS-232 (V.24) control signal, sent from the data
communications equipment to the data terminal equipment on pin 22.
Indicates an incoming call is present. (See
.)
RIP (Routing Information Protocol)
◆
Within IP networks, RIP is an
interior gateway protocol used by routers and host systems to exchange
information about reachable networks. RIP uses a distance-vectoring
algorithm to establish and maintain network routes.
RJ-45
◆
Standard 8-wire connector for IEEE 802.3 networks and
some telephone applications.
Router
◆
Hardware device that connects two or more networks. A
router determines where the destination computer is located, and then
finds the best way to get there.
Routing
◆
Selecting the path to be taken by packets as they traverse
the network.
Routing tables
◆
Stored in voice/data switches or routers to deter-
mine which of several possible paths will be taken through the net-
work.