3Com 3C892 manual Common scenario, is as follows, 10BASE-T Hub-to-Hub Connection

Installing the ISDN LAN Modem 29

CAUTION: You should only have one computer physically connected to the ISDN LAN Modem during configuration. Once you complete the configuration process, connect any other computers you would like to have on the LAN and then power cycle each computer. If the newly-added computers cannot communicate with the ISDN LAN Modem, refer to “Evaluating Symptoms and Solutions” in Chapter 9.

Connecting to Another You can connect to another Ethernet hub to allow up to 25 users to access the Ethernet Hub WAN. Instructions for adding another Ethernet hub to allow 10 users, a more

common scenario, is as follows.

Before You Begin

In addition to an external 10BASE-T Ethernet hub, you will need a 10BASE-T Ethernet cable, which may have been provided with the additional hub. If the hub to which you are connecting your LAN Modem does not have an MDI/X switch, you must use a crossover cable.

1Insert one end of the 10BASE-T Ethernet cable into one of the four LAN ports on the back of the ISDN LAN Modem, as shown in Figure 15.

10-18	VDC
0.8 A MAX
10-18	VDC
0.8 A MAX

+ -

+

-

							ISDN
1 PHONE	2
RESET
						2	1
					3
				4
			5
		6
	7
8
MDI/MDIX

Figure 15 10BASE-T Hub-to-Hub Connection

2Insert the opposite end of the cable into a 10 BASE-T Ethernet port on the other Ethernet hub.

If you are connecting to an OfficeConnect Hub 8/TPO, insert the opposite end of the Ethernet cable into port 8 and then set the MDI/X switch to MDI (that is, pressed in). Make sure that the LED associated with that Ethernet port is lit. If it is not, try changing the MDI/X switch setting.