Black Box 39005, 39004 Fo/S Led, Meaning, 2.Fiber Optic Signal FO/S LED, Setting, Description

T1 FIBER OPTIC LINE EXTENDER/SIMULATOR

Table 4-1 (continued). Key, Jumper, and Switch Settings

Number	Setting	Description
8	Sample mode for incoming intermediate frequency (I/F) data
	Data sampled on positive clock edge (std.)
	Data sampled on negative clock edge
9	Interface Mode
	NT (Network Termination)
	TE (Terminal Equipment)
10	Interface Pin 1 Potential
	Floating
	Connected to frame ground
11	Transmission Mode
	Switch setting is mandatory.
	Switches 1, 2, and 4 must be in OFF position.
	Switch 3 must be in ON position.
12	Test connector. Do not install any jumpers!
	Table 4-2. Fiber Optic Signal (FO/S) LED
FO/S LED		Meaning
Off		No power supplied.
Slow Flash (1.5/s)		No fiber optic link established.
Fast flash (5/s)		Fiber optic link OK but no clock sync.
On		Fiber optic link OK and clock sync OK.

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