Multi-Tech Systems Multivoip 200 Model Mvp200/800 Standalone Voice/ip Getaway User Guide

81 Glossary
Handshaking:  A process that two modems go through at the time of call setup to establish synchronization over the data communications
link.  It is a synchronization and negotiation process accomplished by the exchange of predefined, mutually recognized control codes.
High-level Data Link Control (HDLC):   An ISO standard, bit-oriented data communications protocol that provides nearly error-free data
transfers.
I
Hexadecimal:  A base 16 numbering system used to represent binary values.  Hex...

82 MultiVOIP User Guide
Line Coding:  The representation of 1s and 0s on a T1 line.  The two methods of line coding commonly used, B8ZS and AMI, differ in the
restrictions placed on user data.  T1 line coding ensures that sufficient timing information is sent with the digital signal to ensure recovery of
all the bits at the far end.  Timing information on the T1 line is included in the form of 1s in the data stream; a long string of 0s in the data
stream could cause problems recovering the data.
Line...

83 Glossary
NAK (Negative Acknowledgment):  Communications code used to indicate that a message was not properly received, or that a terminal
does not wish to transmit.  Contrast with ACK.
Network:  A group of computers connected by cables or other means and using software that enables them to share equipment, such as
printers and disk drives to exchange information.
Node:  Any point within a network which has been assigned an address.
O
Object-Orientated:  A method for structuring programs as...

84 MultiVOIP User Guide
Primitive:  An abstract representation of interaction across the access points indicating that information is being passed between the service
user and the service provider.  The OSI Reference Model defines four types of primitives: Request, Indication, Response and Confirm.
Private Branch Exchange (PBX):  A telephone exchange located on the customers premises.  The PBX provides a circuit switching facility
for telephone extension lines within the building, and access to the...

85 Glossary
RS232-C:  An EIA standard for a serial interface between computers and peripheral devices (modem, mouse, etc.).  It uses a 25-pin DB-25,
or a 9-pin DB-9 connector.  The RS-232 standard defines the purposes, electrical characteristics and timing of the signals for each of the 25
lines.
RS-422:   The EIA standard for a balanced interface with no accompanying physical connector.  RS-422 products can use screw terminals,
DB-9, various DB-25, and DB-37 connectors.
RS-530:  The EIA standard for the...

86 MultiVOIP User Guide
T1:  A digital transmission link capable of 1.544M bps.  T1 uses two pairs of normal UTP, and can handle 24 voice conversations, each
digitized at 64K bps.  T1 is a standard for digital transmission in the U.S., Canada, Japan and Hong Kong.  T1 is the access method for high-
speed services such as ATM, frame relay, and SMDS.  See also T Carrier, T1 line and FT1.
T1 Channel Tests:  A set of diagnostics that vary by carrier, used to verify a T1 channel operation.  Can include Tone,...

87 Glossary
V
V.25bis:  An ITU-T standard for synchronous communications between a mainframe or host and a modem using HDLC or other character-
oriented protocol.
V.54:  The ITU-T standard for local and remote loopback tests in modems, DCEs and DTEs.  The four basic tests are:
  local digital loopback (tests DTE send and receive circuits),
  local analog loopback (tests local modem operation),
  remote analog loopback (tests comm link to the remote modem), and
  remote digital loopback (tests remote...

88 MultiVOIP User Guide
Index
A
Archie .................................................................... 71
B
Back Panel ............................................................ 12
C
Collision ................................................................. 11
Command Connector ............................................ 12
Configuration Port Setup ....................................... 40
Configuration Utilities ............................................ 40
Connectors
Command...