|
|
This appendix contains information about the hardware and includes the following sections:
The Cisco Micro Hub automatically shuts off if its internal temperature reaches 85°C (185°F). If the hub shuts off for this reason, you can restart it after the internal temperature has cooled to 50°C (122°F) or below.
The time required for the hub to cool to 50°C or below can vary and is dependent on ambient temperature, the number of hubs in the stack, and the position of a particular hub in the stack. The higher that a particular hub is located in a stack of hubs, the longer that hub will take to cool to 50°C.
Table D-1 lists the system specifications for the Cisco Micro Hubs.
| Description | Specification |
|---|---|
Ports
|
Connector Type
|
|
Access method | CSMA/CD, 10 Mbps |
| Media supported |
|
|
Indicator panel | LEDs:
|
|
Configuration options |
|
|
Processor | 80C31 (Micro Hub 1502)
386EX (Micro Hub 1503) |
| Dimensions (H x W x D) | 3.1 x 11.2 x 8.7" (7.85 x 28.4 x 22.1 cm) (H x W x D) Height includes the stacking curves on top of the hub |
| Weight | 1.3 lb (.6kg) |
| Power (external) | 13.5 VDC (+/- 5%), 2A |
| Nonoperating temperature | -40F to 149°F (-20°C to 65°C) |
| Operating temperature | 32 to 104°F (0°C to 40°C) |
| Operating humidity | 10% to 85%, noncondensing |
| Standards conformance | IEEE 802.3 10BaseT |
Hub Stack
|
|
This section describes the cables and cable wiring that is supported by the Cisco Micro Hubs.
You must supply the Ethernet cable for connecting workstations or other 10BaseT devices, such as compatible hubs or switches, to the Cisco Micro Hub.
The Ethernet cable should meet the following specifications:
If you are connecting another 10BaseT hub or switch, you can also run straight-through 10BaseT cabling from a a port labeled 1X through 8X on this hub to a MDI port on the other device.
However, if you are connecting a Cisco Micro Hub workstation port (labeled 1 through 8) to another hub's MDI-X port, you must use an Ethernet rollover cable. You can identify a rollover cable by comparing the two modular ends of the cable. Holding the cable in your hand, side-by-side, with the tab at the back, the wire connected to the pin on the outside of the left connector (pin 1) should be the same color as the pin on the outside of the right connector (pin 8). On Cisco cables, pin 1 is white on one connector, and pin 8 is white on the other connector.
This section contains wiring specifications for cables used with the Cisco Micro Hub, including the following:
| 8 Pin1 | Description |
|---|---|
| 1 | TX+ |
| 2 | TX- |
| 3 | RX+ |
| 6 | RX- |
Table D-3 describes the wiring for a straight-through 10BaseT cable, which is used to connect the hub to any devices that use a standard Ethernet LAN interface (for example, to a PC or server).
| RJ-45 Pin | Signal | Direction | RJ-45 Pin |
|---|---|---|---|
| 1 | TX+ | --> | 1 |
| 2 | TX- | --> | 2 |
| 3 | RX+ | <-- | 3 |
| 4 | - | - | 4 |
| 5 | - | - | 5 |
| 6 | RX- | <-- | 6 |
| 7 | - | - | 7 |
| 8 | - | - | 8 |
A console cable kit is provided with your hub to connect a console (an ASCII terminal or PC running terminal emulation software) to the hub's CONSOLE port.
The console cable kit contains:
Table D-4 describes the wiring for the CONSOLE port, the console cable, and both adapters.
| CONSOLE Port (DTE) | RJ-45-to-RJ-45 Console Cable | ||||
|---|---|---|---|---|---|
| Signal | RJ-45 Pin | RJ-45 Pin | DB-9 Pin | DB-25 Pin | Signal |
| - | 1 | 8 | 7 | 4 | - |
| DTR | 2 | 7 | 4 | 20 | DSR |
| TxD | 3 | 6 | 3 | 2 | RxD |
| GND | 4 | 5 | 5 | 7 | GND |
| GND | 5 | 4 | 5 | 7 | GND |
| RxD | 6 | 3 | 2 | 3 | TxD |
| DSR | 7 | 2 | 6 | 6 | DTR |
| - | 8 | 1 | 8 | 5 | - |
|
|