2-6 Cisco 7010 Hardware Installation and Maintenance
Site Requirements
Network connections to the coaxial cables are tapped into a network segment and must be spaced at
specific intervals. Table 2-1 lists the maximum number of connections (taps) per segment and the
intervals at which they must be placed. A maximum of four repeaters can be used to link segments
in a single network.
Table 2-1
Ethernet Coaxial Connection Limits for 10-Mbps Transmission
The unshielded twisted-pair (UTP) cabling used with 10BaseT is suitable for voice transmission, but
may incur problems at 10-Mbps transmission rates. UTP wiring does not require the fixed spacing
between connections that is necessary with the coaxial-type connections. IEEE recommends a
maximum distance of 328 feet (100 meters) between station (connection) and hub for 10BaseT
connections.
Fast Ethernet Connections
IEEE 802.3u specifies several different physical layers for 100BaseT: among them are 100BaseTX,
which is 100BaseT, half duplex, over Category 5, unshielded twisted-pair (UTP), Electronics
Industry Association/Telecommunications Industry Association (EIA/TIA)–568-compliant cable;
100BaseFX, which is 100BaseT, full duplex or half duplex over optical fiber; and 100BaseT4, which
is 100BaseT using Category 3, 4, or 5 UTP or shielded twisted- pair (STP) cabling with four pairs.
100BaseT4 is also called 4T+ or T2, which is 2-pair UTP over Category 3 cable.
Table 2-2 lists the cabling specifications for 100-Mbps transmission over 100BaseT, Category 5
UTP and MII connections.
Table 2-2
Connection Limits for 100-Mbps Transmission
Table 2-3 summarizes the characteristics of 100BaseT with respect to IEEE 802.3u physical
characteristics.
Parameter 10Base5
10Base2
Cable diameter
0.4" (1 cm)
0.25" (0.6 cm)
Max. segment length
1640' (500 m)
656' (200 m)
Max. connections (taps) per segment
100
30
Min. connection (tap) spacing
8.2' (2.5 m)
1.64' (0.5 m)
Parameter
RJ-45
MII
Cable specification
Category 5
1
UTP
2
, 22 to 24 AWG
3
1. EIA/TIA-568 or EIA/TIA-568 TSB-36 compliant.
2. Cisco Systems does not supply Category 5 UTP RJ-45 or 150-ohm STP MII cables. Both are commercially available.
3. AWG = American Wire Gauge. This gauge is specified by the EIA/TIA-568 standard.
Category 3, 4 or 5, 150-ohm UTP or STP or multimode optical fiber
Maximum cable length
–
0.5 m (1.64 ft.)
(MII-to-MII cable
4
)
4. This is the cable between the MII port on the FEIP port adapter and the appropriate transceiver.
Maximum segment length
100 m (328 ft.) for 100BaseTX
1 m (3.28 ft.)
5
or 400 m (1,312 ft.) for 100BaseFX
5. This refers specifically to any two stations on a repeated segment.
Maximum network length
200 m (656 ft.)
(with 1 repeater)
–
Содержание TelePresence Server 7010
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Страница 258: ...A 16 Cisco 7010 Hardware Installation and Maintenance MIP Interface Cable Pinouts ...
Страница 270: ...B 12 Cisco 7010 Hardware Installation and Maintenance Interface Processor LEDs ...
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