Cisco Micro Hub User Guide
Hardware Specifications and Cable Wiring
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Hub Specifications and Cable Wiring

Table Of Contents

Hub Specifications and Cable Wiring

Hub Specifications

Cable Wiring Specifications

Ethernet Cable Specifications

Cable Wiring


Hub Specifications and Cable Wiring


This appendix contains the following sections:

Hub Specifications

Cable Wiring Specifications

Hub Specifications

lists the system specifications for the Cisco Micro Hubs.

Table D-1 System Specifications

Description
Specification
Ports

Network device connectors (8)

Interconnect (2)
(Micro 1502 and Micro Hub 1503 only)

Console port (1)
(Micro Hub 1503 only)

Connector Type

RJ-45 MDI-X shielded
(Port 5 provides MDI-X or MDI options)

RJ-45 backplane bus

RJ-45

Access method

CSMA/CD, 10 Mbps

Media supported

100-ohm unshielded twisted-pair (UTP)

100-ohm shielded twisted-pair (STP)

Indicator panel

LEDs:

PWR—Indicates whether power is being supplied to hub

OK—Indicates whether self-test is successful

1-8—Indicates port status: link, activity, partition, and disable

COL—Indicates network collisions

MGMT —(Micro Hub 1503 only) Indicates that hub is receiving SNMP data

Configuration options

Direct connection to the CONSOLE port

Network connection via Telnet service

Network connection via optional SNMP management software

Processor

80C31 (Micro Hub 1502)

386EX (Micro Hub 1503)

Dimensions (H x W x D)

3.1 x 11.2 x 8.7 in. (7.85 x 28.4 x 22.1 cm)
Height includes the stacking curves on top of the hub

Weight

1.3 lb (0.6 kg)

Power (external)

13.5 VDC (+/- 5%), 2A

Nonoperating temperature

-40 to 149°F (-20° to 65°C)

Operating temperature

32 to 104°F (0° to 40°C)

Operating humidity

10 to 85%, noncondensing

Standards conformance

IEEE 802.3 10BaseT

Hub Stack

Expansion

Expansion interface

Configuration

Up to five units

Proprietary RJ-45

Automatic hub-ID and bus termination (for stack)


Cable Wiring Specifications

This section describes the cables and cable wiring that is supported by the Cisco Micro Hubs.

Ethernet Cable Specifications

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:

Straight-through Ethernet

100-ohm Category 3, 4, or 5

Can be shielded or unshielded

No longer than 328 feet (100 meters)

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 an MDI port on the other device.

However, if you are connecting a Cisco Micro Hub workstation port (labeled 1X through 8X) to another hub's MDI-X port, you must use an Ethernet rollover cable. You can identify a rollover cable by comparing the 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) is 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.

Cable Wiring

This section contains wiring specifications for cables used with the Cisco Micro Hub, including the following:

10BaseT port

Straight-through 10BaseT cable (RJ-45 to RJ-45)

Console cable and adapters

Table D-2

8 Pin 1
Description

1

TX+

2

TX-

3

RX+

6

RX-

1 Pins 4, 5, 7, and 8 are not used.


10BaseT Port Wiring

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).

Table D-3

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


Straight-Through 10BaseT Cable (RJ-45 to RJ-45)

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:

RJ-45-to-RJ-45 console cable (light blue)

RJ-45-to-DB-25 adapter (light gray)

RJ-45-to-DB-9 adapter (light gray)

describes the wiring for the CONSOLE port, the console cable, and both adapters.

Table D-4

 
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

-


Console Cable and Adapter Pinouts