Black Box LPBG724A manual Cabling Requirement, Switch Cascading in Topology, Page, 100Base-TXTP

16/24 Port Gigabit PoE PSE With 4 SFP Slots Web Smart Switch

Figure 3-2 Install the switch chassis in a 19"rack

3.3 Cabling Requirement

For successful installation and good network performance, use CAT5, CAT5e, or higher cable. If you use non-compliant cables, the LAN will work poorly.

For a Fast Ethernet TP network connection, the grade of the cable must be CAT5 or CAT5e with a maximum length of 328 feet (100 meters).

3.4 Switch Cascading in Topology

Theoretically, the switch partitions the collision domain for each port in switch cascading so that you may uplink an unlimited number of switches. In practice, the network extension (cascading levels and overall diameter) must comply with the IEEE 802.3/802.3u and other 802.1 series protocol specifications, which limit the timing requirement from physical signals defined by the Media Access Control (MAC) and PHY802.3 series specification, and timer from some OSI layer 2 protocols such as 802.1d, 802.1q, and LACP.

The TP cables, and devices’ bit-time (round-trip) delay are as described in Table 3-1.

100Base-TX TP

Round trip Delay: 512

Cat. 5 TP Wire:	1.12/m
TP to fiber Converter: 56

Bit Time unit: 0.01 s (1sec./100 Mega bit)

Table 3-1. Cable’s bit-time (round-trip) delay.

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