3Com V7122 manual Electrical Earthing

Table 3 V7122 Gateway Rear Panel Cabling (16 Trunks, Dual AC Power) Component Descriptions

Item #	Label	Component Description
1		RTM locking screws.
2	ETHERNET	Two Category 5 network cables, connected to the two Ethernet RJ-
		45 ports.
3	TRUNKS	Two 50-pin Telco connector cables, each supporting eight trunks.
4		Protective earthing screw.
5	100-240~1.5A	Dual AC power cables.
Figure 5	V7122 Gateway Rear Panel Cabling (8 Trunks, DC Power)

Table 4		V7122 Gateway Rear Panel Cabling (8 Trunks, DC Power) Component Descriptions
	Item #	Label	Component Description
1			RTM latches.
2		ETH	A Category 5 network cable, connected to the Ethernet 1 RJ-45 port.
3		PSTN	Eight RJ-48c ports, each supporting a trunk.
4			Protective earthing screw.
5		48V 4A max	2-pin connector for DC.

Electrical Earthing

The unit must be permanently connected to earth using the screw provided at the back of the unit. Use 14-16 AWG wire and a proper ring terminal for the earthing.

To cable the V7122 gateway, follow these 4 steps:

1Permanently connect the device to a suitable earth with the protective earthing screw on the rear connector panel, using 14-16 AWG wire.

16 V7122 Digital Gateway Installation Guide