Telex IP-223 Jumper Settings, 124, PCB 750743 or PCB 750630 revision F, PCB 750630 revision a

Jumper Settings

PCB 750743 or PCB 750630 revision F

Line 1	Jumper Setting
J35	"A" = RS232 serial data, "B" = TTL

Line 2

J26

PCB 750743 or PCB 750630 revision C, D, E, and F

Line 1	Jumper Setting	Line 2
J33, J34	2 or 4 Wire, "A" = 2-wire, "B" = 4-wire	J5, J6
J16, J21	RX Input, "A" = Single ended, "B" = Balanced	J19, J20
J14	RX Input Impedance, “A” = 600, “B” = 8 and Center = 10Kohm	J24
J3, J9, J11	TX Output, “A” = Single ended, “B” = Balanced	J25, J28,
		J29
J13	TX Output Level, “A” = Low, “B” = High	J27
J8	Digital I/O Pull-up Voltage, “A” = +5, “B” = +12	J30
J17, J22	TX Output Impedances: “B” = 600 ohms	J10, J15
(J17), J22	(“A”) and “B” = 1.2K ohms	(J10), J15
J17, (J22)	“A” and (“B”) = 1.8K ohms	J10, (J15)
J17, J22	“A” = 2.4K ohms	J10, J15

PCB 750630 revision A

Line 1	Jumper Setting	Line 2
J33, J34	2 or 4 Wire, “A” = 2-wire, “B” = 4-wire	J5, J6
J15, J16,	RX Input, “A” = Single ended, “B” = Balanced	J19, J20,
J21		J22
J14, J23	RX Input Impedances: “B” = 10K ohms	J24, J17
(J14), J23	(“A”) and “B” = 600 ohms	(J24), J17
(J23), J14	(“A”) and “B” = 8 ohm speaker	(J17), J24
J3, J9,	TX Output, “A” =Single ended, “B” = Balanced	J25, J26,
J10, J11		J28, J29
J13	TX Output Level, “A” = Low, “B” High	J27
J8	Digital I/O Pull-up Voltage, “A” = +5, “B” = +12	J30

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