Fiber Optic Considerations

Question 1

SMF

Answer 1

Single Mode Fiber

• Small core 8-10 Microns and long wavelength generated by laser
• Supports data rates up to 100 Gbps and many KM length
• Two Grades OS1 for indoor and OS2 for Outdoor

Question 2

MMF

Answer 2

Multimode Fiber

• Larger core than SMF
• Less expensive than SMF
• Does not support as high speeds or distances
• More suitable for LANs

Question 3

OM1/OM2

Answer 3

Optical Multimode

• Grades of MMF
• Rates for applications up to 1 Gbps and use LED transmitters

Question 4

OM3/OM4

Answer 4

Optical Multimode

• Grade of MMF
• Users Cavity Surface-Emitting Lasers(VCSEL)
• Higher Modulation than LED optics

Question 5

ST

Answer 5

Straight Tip

• Fiber optic connector
• Early style with push and twist locking mechanism
• Mostly used for multimode networks, not used much anymore

Question 6

SC

Answer 6

Subscriber Connector

• Push/Pull design allowing for simple insertion and removal
• Users for Single or multimode
• Used commonly for Gigabit Ethernet

Question 7

LC

Answer 7

Local Connector

• Small form factor connector with tabbed push-pull design
• Similar to SC but smaller size allows for high port density
• Widely used for Gigabit Ethernet and 10/40 GbE

Question 8

MTRJ

Answer 8

Mechanical Transfer Registered Jack

- small form factor duplex connector with snap-in design for multimode networks

Question 9

100BASE-FX

Answer 9

Optics: 1300nm
Cable: MMF (OM1), MMF (OM2)
Max Distance: 2 KM
Connector: ST, SC, MT-RJ

Question 10

100BASE-SX

Answer 10

Optics: 850nm
Cable: MMF (OM1), MMF (OM2)
Max Distance: 550 m
Connector: ST, SC, LC

Question 11

1000BASE-SX

Answer 11

Optics: 850nm
Cable: MMF (OM1), MMF (OM2), MMF (OM3)
Max Distance: 275 M
Connector: ST, SC, LC, MT-RJ

Question 12

1000BASE-LX

Answer 12

Optics: 1300nm
Cable: MMF (OM1/2/3) SMF(OS1/2)
Max Distance: 550M
Connector: SC, LC

Question 13

10GBASE-SR

Answer 13

Optics: 850nm
Cable: MMF (OM2/3/4)
Max Distance: 82m, 300m, 400m
Connector: SC, LC

Question 14

10GBASE-LR

Answer 14

Optics: 1310nm
Cable: SMF (OS1/2)
Max Distance: 10 KM
Connector: SC, LC

Question 15

Principal Applications of 10 GbE

Answer 15

• Increased bandwidth for server interconnections and network backbones, especially for datacenters and SANS
• Replacing existing switched public data networks based on proprietary technologies with simpler Ethernet switched

Question 16

Fiber Optic Patch Cords

Answer 16

• Can user same connector on each end, or different
• Duplex must maintain polarity (Tx must be linked to Rx)
• Must be odd number of elements to maintain crossover

Question 17

PC

Answer 17

Physical Contact

• Type of Fiber optic finishing
• Faces of connection and fiber tips are polished so that they curve slightly and fit together, reducing loss

Question 18

UPC

Answer 18

UltraPhysical Contact

• Type of Fiber optic finishing
• Cable and connector are polished to higher standard than with PC