Flashcards in Ch. 6 - Backbone Distribution Systems.csv Deck (54)
Where is the main cross-connect (MC)/campus distributor (CD) typically located?
Equipment rooms (ER)
Where is an intermediate cross-connect (IC)/building distributor (BD) typically located?
Equipment Room (ER)
*Campus systems containing small buildings with only one HC per bldg, thereby eliminating the need for an ____.
*A backbone star topolgy shall have no more than_______
two levels of cross connections
Connections between any two HC's shall not pass through more than______
three cross connections
The termination field color for a second level intrabuilding backbone is:
Direct connections TR's are allowed if the backbone distribution system is expected to meet the requirements for a __________ or ________.
bus topology or ring topology configuration.
A design for a one-level hierarchical star campus backbone would
link all of the buildings to the MC.
MC is ideally located
at the center of the building being served.
A 1-level hierarchical star interbuilding (campus) backbone topology:
Provides increased flexibility
Allows reconfiguration of applications from the MD (CD)
Simplifies the addition of future campus backbones
Selected IC's to serve a number of buildings rather than all direct to the MC.
Multiple hierachical level
*Connecting outlying buildings in a physical ring is _________ recommended.
The primary reason for considering a physical ring backbone topology is:
as a redundant path
Case or housing
_________ align TR's in multi-story buildings whenever possible.
How many MCs (CDs) are permitted in a building cabling system?
Cost effective medium for data is ________, for voice is ________
fiber, copper (balanced twisted pair)
Ideally, the MC would be co-located in the _____.
Length & Data Rates: Campus backbones (OM1 fiber)
1.2 mi & 155 Mb/s
Length & Data Rates: Campus backbones (OM2 fiber)
1,804' & 1 Gb/s
Length & Data Rates: Building backbones (OM2 fiber)
984' & 1 Gb/s
The max campus/building backbone length recommended for OM2 fiber (data rates up to 1Gb/s) is:
Length & Data Rates: Campus/Building backbones (OS1 fiber)
6,560' & 10 Gb/s
The max campus/building backbone length recommended for OS2 fiber (data rates up to 10Gb/s) is:
32,800 ft (6 mi)
Recommended multimode fiber cable
62.5/125 um & 50/125 um
Singlemode fiber wavelengths
1310 & 1550
Recommended copper size for building backbones:
24-22 AWG round, solid copper
Recommended copper sizes for campus backbones:
19 AWG & 26 AWG