Hub Specifications and Cables

This appendix provides system, cabling, and port specifications for the hub.

System Specifications

Table C-1 outlines the system specifications for the hub.

Description	Specification
Environmental Operating Ranges
Nonoperating temperature	-13 to 158°F (-25 to 70°C)
Nonoperating humidity	0 to 90%, noncondensing
Nonoperating altitude	up to 30,000 ft (9146 meters)
Operating temperature	32 to 113°F (0 to 40°C)
Operating humidity	0 to 85%, noncondensing
Operating altitude	up to 9840 ft (3000 meters)
Power Requirements
AC input voltage	100 to 127 VAC, 200 to 240 VAC
Power consumption	12W
Physical Dimensions
Dimensions (H x W x D)	3.1 x 11.2 x 8.7 in. (7.9 x 28.5 x 22.1 cm) Height includes the stacking curves on top of the hub.
Weight	2.7 lb (1.2 kg)

Table C-1: System Specifications

Description Specification

Environmental Operating Ranges

Nonoperating temperature

-13 to 158°F (-25 to 70°C)

Nonoperating humidity

0 to 90%, noncondensing

Nonoperating altitude

up to 30,000 ft (9146 meters)

Operating temperature

32 to 113°F (0 to 40°C)

Operating humidity

0 to 85%, noncondensing

Operating altitude

up to 9840 ft (3000 meters)

Power Requirements

AC input voltage

100 to 127 VAC, 200 to 240 VAC

Power consumption

12W

Physical Dimensions

Dimensions (H x W x D)

3.1 x 11.2 x 8.7 in. (7.9 x 28.5 x 22.1 cm)

Height includes the stacking curves on top of the hub.

Weight

2.7 lb (1.2 kg)

Ethernet Cable Specifications

For information on the straight-through Ethernet cables you must supply to connect networking devices to the hub, refer to the "Preinstallation" section in Chapter 2 "Hub Specifications and Cables."

If you are connecting a compatible switch or another Cisco 1528 Micro Hub 10/100, in addition to the straight-through Ethernet cable, you can also use a crossover Ethernet cable. Table C-2 and Table C-3 list the crossover Ethernet cable specifications for connecting a compatible switch and another Cisco 1528 Micro Hub 10/100, respectively.

Table C-2: Crossover Ethernet Cable Specifications for Connecting Compatible Switch

Type Category Shielding Maximum Length

10BaseT

3 or 5

Shielded twisted-pair (STP) or unshielded twisted-pair (UTP)

328 ft (100 meters)

100BaseTX

5 only

STP or UTP

328 ft (100 meters)

Type	Category	Shielding	Maximum Length
10BaseT	3 or 5	Shielded twisted-pair (STP) or unshielded twisted-pair (UTP)	328 ft (100 meters)
100BaseTX	5 only	STP or UTP	328 ft (100 meters)

Table C-3: Crossover Ethernet Cable Specifications For Connecting Another Cisco 1528 Micro Hub 10/100

Type Category Shielding Maximum Length

100BaseTX

5 only

STP or UTP

16.4 ft (5 meters)

Type	Category	Shielding	Maximum Length
100BaseTX	5 only	STP or UTP	16.4 ft (5 meters)

For more information on connecting the hub to another Cisco 1528 Micro Hub 10/100, refer to Appendix B, "Cabling Guidelines."

Use a crossover Ethernet cable to connect any hub port to any port on the compatible switch or another Cisco 1528 Micro Hub 10/100. When connecting to a compatible switch, set the MDI/MDI-X button on the hub OUT. When connecting to another hub, set the buttons on both hubs OUT.

Cable Wiring

This section contains wiring specifications for the following cables used with the hub:

Straight-through 10BaseT/100BaseTX Ethernet cable (RJ-45 to RJ-45)
Crossover 10BaseT/100BaseTX Ethernet cable (RJ-45 to RJ-45)

Table C-4 describes the wiring for the straight-through 10BaseT and 100BaseTX Ethernet cable. Table C-5 describes the wiring for the crossover 10BaseT and 100BaseTX Ethernet cable.

RJ-45 (from Network Device) Pin	Signal	Direction	RJ-45 (from Hub) Pin
1	RX+	--->	1
2	RX-	--->	2
3	TX+	<---	3
4	-	-	4
5	-	-	5
6	TX-	<---	6
7	-	-	7
8	-	-	8

RJ-45 (from Network Device) Pin¹	Signal	Direction	RJ-45 (from Hub) Pin
1	RX+	--->	3
2	RX-	--->	6
3	TX+	<---	1
4	-		-
5	-		-
6	TX-	<---	2
7	-		-
8	-		-

Table C-4:

RJ-45 (from Network Device) Pin Signal Direction RJ-45 (from Hub) Pin

1

RX+

--->

1

2

RX-

--->

2

3

TX+

<---

3

4

-

-

4

5

-

-

5

6

TX-

<---

6

7

-

-

7

8

-

-

8

Straight-Through 10BaseT/100BaseTX Ethernet Cable
Table C-5:

RJ-45 (from Network Device) Pin¹ Signal Direction RJ-45 (from Hub) Pin

1

RX+

--->

3

2

RX-

--->

6

3

TX+

<---

1

4

-

-

5

-

-

6

TX-

<---

2

7

-

-

8

-

-

¹Incorrectly connected unused wires generate noise on long lengths.

Crossover 10BaseT/100BaseTX Cable

Port Wiring

Table C-6 contains wiring specifications for the eight hub ports.

8 Pin¹	Description
1	RX+
2	RX-
3	TX+
6	TX-

Table C-6:

8 Pin¹ Description

1

RX+

2

RX-

3

TX+

6

TX-

¹Pins 4, 5, 7, and 8 are not used.

10BaseT/100BaseTX Port Wiring

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