Lucent Technologies Release 6 manual Connecting Fiber Optic Cables

DEFINITY Enterprise Communications Server Release 6		Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112		May 1998
A Connecting Fiber Optic Cables
		Page A-1
	A	A
	Connecting Fiber Optic Cables

Signals between cabinets are carried by fiber optic cables. The electronic signals at 1 cabinet must be converted into optical signals. These optical signals are converted back into electronic signals at another cabinet.

The fiber optic cables from the DEFINITY System route to a Lightguide Interconnect Unit (LIU), connect to the outside fiber plant, and then connect to the remote DEFINITY System via an LIU.

Two types of fiber optic cables are used on DEFINITY Systems: multi-mode and single-mode. See Table A-1.

■Multi-mode fiber uses LEDs as its light source and is less expensive than single-mode fiber. There are 2 common types of multi-mode fiber:

—62.5 micron core

—50.0 micron core

■Single-mode fiber is more expensive than multi-mode because it uses LASER light as its light source. Single-mode fiber typically uses the 8-10 micron core fiber.

Table A-1. Fiber Optic Reference

		Operating
Fiber Core	Transceiver	Wavelength
Size	Model	(Nanometers)	Fiber Type
50 or 62.5	9823A	850 nm	Multi-mode
50 or 62.5	9823B	1300 nm	Multi-mode
8.3 -9.0	300A	1300 nm	Single-mode