3Com 3C888 User Guide - Page 17

Hardware Description 17 Table 4 Front Panel LED Indicator Definitions (continued) LED COLL Ports 1-4 Color Amber Green Description Ethernet Collision Status. Flashes amber when some collisions are taking place on the Ethernet LAN. Off indicates that no collisions are taking place on the Ethernet LAN. Ethernet LAN Port Status. On indicates that the unit detects the Ethernet link integrity signal from an attached computer and operation is normal. Flashes when the LAN Modem receives data on the associated port. Off indicates that the unit does not detect the Ethernet link integrity signal. The Ethernet cable may not be properly connected or the cable may be the wrong polarity. Back Panel Connector The back panel contains the connectors illustrated in Figure 6. Description 10-30V DC 2A MAX RESET 1 2 LINE 1 PHONE 1 LINE 2 PHONE 2 3 4 LAN Figure 6 Dual 56K LAN Modem Back Panel From left to right, the back panel consists of the following: s Power: Connect the power module cable to this port. s RESET: Press this button to re-initialize or factory re-set the unit (refer to Chapter 10 for instructions). s LAN 1, 2, 3, and 4: Connect up to four computers (or a combination of computers and an external hub), to these four 10BASE-T Ethernet ports. s LINE 1: Connect one of the provided RJ-11 analog cables from the wall outlet to this port. s PHONE 1: Connect an external analog device, such as a telephone or fax machine, to this port. s LINE 2: Connect the second RJ-11 analog cable from the wall outlet to this port. s PHONE 2: Connect an additional external analog device, such as a telephone or fax machine, to this port.