Chapter 5 Backbone Distribution Systems - Terms

Question 1

Backbone Distribution
System

Answer 1

THE PRT OF THE PREMISES DISTRIBUTION SYSTEM THAT PROVIDES CONNECTION BETWEEN TELECOMMUNICATIONS SPACES.

Question 2

CO

Answer 2

Central Office
A common carrier switching cente
office (also called public exchange
that is conveniently located in areas to
serve subscriber homes and
businesses. It provides telephony
services (lines) that are connected on
a local loop. The CO contains
switching equipment that can switch
calls locally or to long-distance carrier
telephone offices.

Question 3

EF

Answer 3

Entrance Facility
An entrance to a building for both
public and private network service
cables (including wireless),
including the entrance point of the
building and continuing to the
entrance room or space.

Question 4

EFM

Answer 4

EHTERNET FIRST MILE - TERM USED TO DESRIBE THE ACCESS NETWORK FROM THE ACCESS POINT TO THE USERS PREMISES.

Question 5

ER

Answer 5

Equipment Room
An environmentally controlled
centralized space for
telecommunications equipment
that usually houses a main or
immediate cross-connect.

Question 6

HC (FD)

Answer 6

Horizontal Cross-Connect
(Floor Distributor)
A group of connectors that allow
equipment and backbone cabling to
be cross-connected or
interconnected with patch cords or
jumpers to horizontal cabling.
FD is the international
equivalent for HC.

Question 7

IC (BD)

Answer 7

Intermediate Cross-Connect
(Building Distributor)
The connection point between a
backbone cable that extends
from the MC (CD) [first-level
backbone] to the HC (FD)
[second-level backbone].
BD is the international
equivalent term for IC.

Question 8

MC (CD)

Answer 8

Main Cross-Connect
(Campus Distributor)
The cross-connect normally
located in the (main) equipment
room for cross-connection and
interconnection of entrance cables,
first level backbone cables, and
equipment cables.
CD is the international
equivalent for MC.

Question 9

RMC

Answer 9

RIDGID METALLIC CONDUIT - A THREADED METAL RACEWAY OF CIRCULAR CROSS-SECTION WITH A COIPLING.

Question 10

TE

Answer 10

Telecommunications Enclosure
A case or housing that may
contain telecommunications
equipment, cable
terminations, or horizontal
cross-connect cabling.

Question 11

TR

Answer 11

Telecommunications Room
An enclosed architectural space
for housing telecommunications
equipment, cable terminations,
and cross-connect cabling.