Cisco各类线缆

来源：vlan9收集作者：出处：巧巧读书 2005-08-22 进入讨论组

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Low-Speed Access Card Fantail Cable

This 100-pin data cable is used as the means of interconnection between the bulkhead connector of a low-speed X.21, RS-449, or V.35 access card and the back of the fantail.

The cable is available from Cisco Systems in three lengths. For ordering purposes, use the appropriate order number from the table below.

Manufacturing No.	Length	Order No.
72-1117-01	4 feet	L2020-CAB-F4=
72-1118-01	8 feet	L2020-CAB-F8=
72-1119-01	12 feet	L2020-CAB-F12=

Note that two such data cables are required to connect one X.21 fantail to a low-speed access card, while one only such cable is required to connect each V.35 or RS-449 fantail to a low-speed access card.

X.21 Interface Cable

This cable is used to connect the X.21 fantail connector to an external X.21 device.

The cable is available from Cisco Systems in three lengths. For ordering purposes, use the appropriate order number from the table below.

Note Use the switches on the X.21 fantail to select a DTE or DCE interface for each port.

Manufacturing No.	Length	Order No.
72-0991-01	30 feet	LS-CAB-X21-TC30=
72-0992-01	50 feet	LS-CAB-X21-TC50=
72-0993-01	100 feet	LS-CAB-X21-TC100=

Figure 3-6 is a signal diagram for the X.21 fantail cable.

Figure 3-6: X.21 Cable Signal Diagram

RS-449 Interface Straight-Through Cable

This cable is used to connect an RS-449 fantail interface to an external RS-449 DCE device.

This cable is available from Cisco Systems. For ordering purposes, use the appropriate order number from the table below.

Manufacturing No.	Length	Order No.
72-1002-01	30 feet	LS-CAB-RS4-TC30=
72-1003-01	50 feet	LS-CAB-RS4-TC50=
72-1004-01	100 feet	LS-CAB-RS4-TC100=

Figure 3-7 is a signal diagram for the RS-449 fantail straight-through cable.

Figure 3-7: RS-449 Straight-through Cables Signal Diagram

RS-449 Interface Crossover Cable

This cable is used to connect two LS2020 switches via their RS-449 fantail interfaces, or to connect an RS-449 fantail interface to an external RS-449 DTE device.

The cable is available from Cisco Systems. For ordering purposes, use an appropriate order number from the table below.

Manufacturing No.	Length	Order No.
72-1008-01	8 feet	LS-CAB-RS4-TT8=
72-1005-01	30 feet	LS-CAB-RS4-TT30=
72-1006-01	50 feet	LS-CAB-RS4-TT50=
72-1007-01	100 feet	LS-CAB-RS4-TT100=