Multitech Multivoip 100 Model Mvp110 Voice/fax Over Ip Networks User Guide

81 Appendix C - Regulatory Information
Canadian Limitations Notice
Ringer Equivalence Number
Notice: The ringer equivalence number (REN) assigned to each terminal device provides an
indication of the maximum number of terminals allowed to be connected to a phone interface. The
termination on an interface may consist of any combination of devices subject only to the requirement
that the sum of the ringer equivalence numbers of all the devices does not exceed 5.
Notice: The Industry Canada label identifies...



	


Glossary 

83 Glossary
A
Access:   The T1 line element made up of two pairs of wire that the phone company brings to the customer premises. The Access portion
ends with a connection at the local telco (LEC or RBOC).
Accunet Spectrum of Digital Services (ASDS):   The AT&T 56K bps leased (private) line service. Similar to services of MCI and Sprint.
ASDS is available in nx56/64K bps, where n=1, 2, 4, 6, 8, 12.
ACK (ACKnowledgement code) (pronounced ack):  A communications code sent from a receiving modem to a...

84 Glossary
Bell Operating Companies (BOC): The family of corporations created during the divestiture of AT&T. BOCs are independent companies
which service a specific region of the US. Also called Regional Bell Operating Companies (RBOCs).
Bell Pub 41450:  The Bell publication defining requirements for data format conversion, line conditioning, and termination for direct DDS
connection.
Bell Pub 62310:  The Bell publication defining requirements for data format conversion, line conditioning, and...

85 Glossary
Circuit-switched Network:  A technology used by the PSTN that allocates a pair of conductors for the exclusive use of one communication
path. Circuit switching allows multiple conversations on one talk path only if the end-users multiplex the signals prior to transmission.
Circuit switching:  The temporary connection of two or more communications channels using a fixed, non-shareable path through the
network. Users have full use of the circuit until the connection is terminated.
Clear...

86 Glossary
Device driver:  Software that controls how a computer communicates with a device, such as a printer or mouse.
Digital Cross-connect System (DCS):The CO device which splits and redistributes the T1 bandwidth. the DCS takes time slots from
various T1 lines and alters them to provide the needed connectivity. DCS connections are made with software at an administrators
workstation.
Digital Data:  Information represented by discrete values or conditions (contrast Analog Data).
Digital Loopback:  A...

87 Glossary
Exchange:  A unit (public or private) that can consist  of one or more central offices established to serve a specified area. An exchange
typically has a single rate of charges (tariffs) that has previously been approved by a regulatory group.
Exchange Area:  A geographical area with a single uniform  set of charges (tariffs), approved by a regulatory group, for phone services. Calls
between any two points within an exchange area are local calls. See also Digital PBX, PBX.
Exchange...

88 Glossary
G
Gatekeeper: An H.323 entity that provides address translation, control access, and sometimes bandwidth management to the LAN for H.323
endpoints.
Gateway:  1. A functional unit that interconnects two computer networks with different network architectures. A gateway connects networks or
systems of different architectures. A bridge interconnects networks or systems with the same or similar architectures. 2. A network that
connects hosts. 3. An H.323 entity that provides real-time, two-way...

89 Glossary
ISDN (Integrated Services Digital Network):    An International telecommunications standard for transmitting voice, video and data over a
digital communications line. ISDN is a  world-wide telecommunications service that uses digital transmission and switching technology to
support voice and digital data communications. Frame relay was partially based on ISDNs data link layer protocol (LAPD). Frame relay can
be used to transmit across ISDN services offering circuit-switched connection at 64K...

90 Glossary
M
Management Information Base (MIB):  A database of network management information used by the Common Management Information
Protocol (CMIP) and the Simple Network Management Protocol (SNMP).
Megacom:   An AT&T service with a normal WATS line (typically T1) between the customer premise and the AT&T serving class 4 CO  are
the customers responsibility.
MegaLink:    BellSouths leased T1 service.
Message:  Associated with such terms as packet, frame, and segment. 1. In information theory, an...