3Com 3C17700 Getting Started Guide - Page 28
Choosing the Correct 10/100/1000BASE-T Cables, Choosing the Correct, 100/1000BASE-T, Cables - user guide
UPC - 662705357720
View all 3Com 3C17700 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 28 highlights
28 CHAPTER 2: INSTALLING THE SWITCH WARNING: If you are connecting the Switch to a Type 3 Power Module, read the Safety Information section in the Type 3 Power Module User Guide. CAUTION: The Switch can only use a SuperStack Advanced Redundant Power System output. CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is by connecting or disconnecting the power cord. Choosing the Correct 10/100/1000BASE-T Cables If your Switch has 10/100/1000BASE-T ports, these ports are Auto-MDIX, that is they have a cross-over capability. These ports can automatically detect whether to operate in MDI or MDIX mode. Therefore you can make a connection to one of the ports with a straight-through (MDI) or a cross-over cable (MDIX). The Auto-MDIX feature only operates when auto-negotiation is enabled. If auto-negotiation is disabled, all the Switch ports are configured as MDIX (cross-over). If you want to make a connection to another MDIX port, you need a cross-over cable. Many ports on workstations and servers are configured as MDI (straight-through). If you want to make a connection to an MDI port, you need to use a standard straight-through cable. See Table 7. 3Com recommends that you use at least Category 5 twisted pair cable - the maximum segment length for this type of cable is 100 m (328 ft). Table 7 Cables required to connect the Switch to other devices if auto-negotiation is disabled Switch to Switch (MDIX to MDIX) Switch to Hub (MDIX to MDIX) Switch to PC (NIC) (MDIX to MDI) Cross-over Cable ✓ ✓ ✕ Straight-through Cable ✕ ✕ ✓ CAUTION: If you want to install the Switch using a Category 5E or Category 6 cable, 3Com recommends that you briefly connect the cable