分类： 系统运维
2008-05-22 09:20:11
This chapter describes the I/O interfaces, the data cables, and power cordsets required in usi ng the LS2020 enterprise ATM switch. These facilities are described in the following order:
Signal diagrams are provided for each I/O connector and data cable.
For most cables, two part numbers are provided in an associated table in the body of the chapter: the manufacturing number (which appears on the cable itself); and the order number (which is used in ordering the cable from Cisco Systems). Cables without associated order numbers are not available from Cisco Systems; such cables are widely available from other vendors as standard items.
shows the conventions
This section presents the specifications for the connectors and data cables for the low-speed X.21, RS-449, and V.35 serial I/O interfaces of the LS2020 switch. This information is presented as follows:
shows the pin assignments of the X.21 fantail connector.
Interface connector type: DB15 female
Connectors per fantail: 8 (numbered 0 - 7)
shows the pin assignments of the RS-449 fantail connector.
Interface connector type: DB37 male
Connectors per fantail: 4 (numbered 0 - 3)
Figure 3-3:
.35 Fantail Connector
shows the pin assignments of the V.35 fantail connector.
The RS-232 DSU/CSU connector appears on both the V.35 and RS-449 fantails. If you connect the control port to the craft port on a DSU/CSU device, you can use the csumon program to communicate with the DSU/CSU from an LS2020 switch.
Interface connector type: DB9 male
Connectors per fantail: 4 (numbered 0 - 3)
shows the pin assignments of the RS-232 DSU/CSU control port connector.
Figure 3-5:
This 100-pin data 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.
he X.21 fantail to select a DTE or DCE interface for each port.
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= |
| 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= |
| Manufacturing No. | Length | Order No. |
|
72-1009-01 |
30 feet |
LS-CAB-V35-TC30= |
|
72-1010-01 |
50 feet |
LS-CAB-V35-TC50= |
|
72-1011-01 |
100 feet |
LS-CAB-V35-TC100= |
| Manufacturing No. | Length | Order No. |
|
72-0997-01 |
8 feet |
LS-CAB-V35-TT8= |
|
72-0994-01 |
30 feet |
LS-CAB-V35-TT30= |
|
72-0995-01 |
50 feet |
LS-CAB-V35-TT50= |
|
72-0996-01 |
100 feet |
LS-CAB-V35-TT100= |
Circuit Emulation Access Card (CEMAC) Connectors and Cables shows the CEMAC card and its associated data cable. To make a more secure connection, unscrew the top mounting screw (shown as "1" in the figure) in the connector retention bracket and reposition it in the connector (as shown by "2" in the figure). Next, tighten down the mounting screw to attach the data cable to the CEMAC card securely (as shown by "3" in the figure). Finally, secure the cable to the CEMAC bulkhead connector with the Velcro strip.
0 26 1 39 14 1 27 2 40 15 2 28 3 41 16
Figure 3-11:
Receive
Transmit
Port
Tip
Ring
Tip
Ring
|
|
3 |
29 |
4 |
42 |
17 |
|
4 |
30 |
5 |
43 |
18 | |
|
5 |
31 |
6 |
44 |
19 | |
|
6 |
32 |
7 |
45 |
20 | |
|
7 |
33 |
8 |
46 |
21 | |
|
Not used |
34 |
9 |
47 |
22 | |
|
Not used |
35 |
10 |
48 |
23 | |
|
Not used |
36 |
11 |
49 |
24 | |
|
Not used |
37 |
12 |
50 |
25 | |
| Note: The information in this table is an extraction from Figure 10 of American National Standard T1.403-1989. | |||||
