Installing the ISDN LAN Modem 29CAUTION: You should only have one computer physically connected to the ISDNLAN Modem during configuration. Once you complete the configuration process,connect any other computers you would like to have on the LAN and then powercycle each computer. If the newly-added computers cannot communicate with theISDN LAN Modem, refer to “Evaluating Symptoms and Solutions” in Chapter 9.Connecting to AnotherEthernet HubYou can connect to another Ethernet hub to allow up to 25 users to access theWAN. Instructions for adding another Ethernet hub to allow 10 users, a morecommon scenario, is as follows.Before You BeginIn addition to an external 10BASE-T Ethernet hub, you will need a 10BASE-TEthernet cable, which may have been provided with the additional hub. If the hubto which you are connecting your LAN Modem does not have an MDI/X switch,you must use a crossover cable.1 Insert one end of the 10BASE-T Ethernet cable into one of the four LAN ports onthe back of the ISDN LAN Modem, as shown in Figure 15.Figure 15 10BASE-T Hub-to-Hub Connection2 Insert the opposite end of the cable into a 10 BASE-T Ethernet port on the otherEthernet hub.If you are connecting to an OfficeConnect Hub 8/TPO, insert the opposite end ofthe 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 isnot, try changing the MDI/X switch setting.+- 10-18 VDC0.8 A MAX 1 PHONE 2RESETISDN+-10-18 VDC0.8 A MAX MDI/MDIX8 7 6 5 4 3 2 1
