Ericsson LBI-39076B system manual GTI DIP Switch Settings, Revision-D or E Main Board, Did

LBI-39076B INSTALLATION

Revision-D or E Main Board

The revision-D or E Main boards contain two jumpers (JP3 and JP4) and a matrix card connector (J5) to configure the telephone interface. Set the jumpers and insert the Matrix card to match the type of telephone line to be connected to it. Figure 24 shows the locations of the jumpers and the Matrix card connector. Table 4 lists which jumpers and Matrix card are used for each supported type of telephone line.

Three matrix cards are supplied with each GTI unit. They are labeled E-E (for End-to-End), DID (for direct inward dial), and 4-W (for 4-Wire E&M). The matrix card will fit into J5 two ways, but only one way is correct. Be sure that the A1 end of the matrix card goes into the A1 end of J5.

	A1
	J5
Matrix Board	JP3
	A
	B
	A
	B
	JP4
FRONT

Figure 24 - Jumper Locations (Rev D or E Main Board)

Table 4 - Configurations (Rev D or E Main Board)

TELEPHONE	JP3	JP4	MATRIX
LINE TYPE			CARD
End-to-End, Loop Start	B	A*	E-E
End-to-End, Ground Start	B	A*	E-E
4-Wire E&M, Microwave	A	A*	4-W
4-Wire E&M, Type I	A	A*	4-W
DID	B	A*	DID

*Use the B position when the distance to the PBX is short (gives better hybrid balance).

The End-to-End and DID Matrix cards contain no jumpers to configure. However, the 4-Wire E&M matrix card has three jumpers (JP1 through JP3) to configure. The function of each jumper is shown in Figure 25.

7. GTI DIP SWITCH SETTINGS

The 7th step to install the ELI option, is to set the two DIP switches through openings in the right side of the GTI

chassis. The orientation of the DIP switches is shown in Figure 26.

			JP2
		-48 Vdc Reference	-48
		Ground Reference	GND
1	M-Lead External Reference		EXREF
	M-Lead	NC
2		JP1
	4-W Send	NO
3			K2
	4-W Rec	Trans-	Rec Audio
4		former
5	4-W Rec
	4-W Send	Trans-	Send Audio.
6		former
7	E-Lead	E-Lead Det.
8	E-Lead External Reference		EXREF
		Ground Reference	GND
		-48 Vdc Reference	-48
			JP3

Figure 25 - 4-Wire E&M Card (Rev D or E Main Board)

FRONT
1		1
0		0
1	8	1	8
SW2			SW1

Figure 26 - GTI Unit DIP Switch Orientation

In the left-hand DIP switch (SW2), switch sections 1 through 4 are set to identify the type of telephone line to be connected to the GTI unit, switch section 5 is not used, and switch sections 6 through 8 are used to set the baud rate for the serial data port to the GTI Configurator terminal.

In the right-hand DIP switch (SW1), switch sections 1 through 6 are set to match the radio channel number connected to the GTI unit (this will also be the line number of the telephone line connected to that GTI unit), and switch sections 7 and 8 are not used.

Table 5 summarizes the defined switch settings for both DIP switches. Switch combinations not shown are not supported by the ELI option.

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