Vanguard Managed Solutions 650 installation manual Changing the, Modem Strapping

Cabling the 650 Series

Changing the	The default setting for the modem strapping is in 4-wire mode. If you need to change
Modem Strapping	the modem support from the default 4-wire position to the 2-wire mode, you must
	perform the following steps:
	1)	Locate the J10 strap on the modem card.
	2)	Remove the blue jumper by sliding it up, off of the pins that specify 4-wire mode
		(see Figure 2-4).
	3)	Carefully slide the jumper over the pins that specify 2-wire mode. The pins for
		2-wire mode are to the left of the default 4-wire position when facing the card as
		oriented in the figure.

Figure 2-4shows the strapping positions for 2-wire and 4-wire modes.

2W 4W 2W 4W

J10	J10
4-Wire Mode	2-Wire Mode
(Default)

Figure 2-4. 4-Wire and 2-Wire Modem Strapping Positions

2-6 Installing 650 Series Hardware