GarrettCom Magnum ST80 Manual De Usuario

Stackable Personal Hubs 

 Installation and User Guide   (04/01)

 
 

14

 

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The AUI port may also used for connecting to other Ethernet devices using 

standard AUI cabling.  In this type of situation, it is important to consider the AUI segment 

length to the attached device, including any cascading. 

 

The maximum transmission distance between a backbone transceiver and the AUI 

port of the ST80 will vary.  According to Ethernet standards, when an AUI cable is used to 

connect the ST80 directly to a backbone transceiver, the maximum AUI segment length of 

50m (165 ft.) is allowed. If the ST80 is connected to a transceiver that has been cascaded 

from another transceiver, the maximum AUI segment length is reduced.  See the following 

note. 

Important Note:    The maximum transmission distance is decreased by 6m (20 

 

ft.) for every additional level of network transceiver device "dropped" or 

 

"cascaded" from the original backbone transceiver tap. 

 

 

The AUI connector of the Stackable Personal Hub supports standard IEEE signals, 

which are summarized in Table 3.5 

  

 

Function  

 

Pin Function 

 

1 

Control In Circuit Shield 

10 

Data Out Circuit B 

 

2 

Control In Circuit A 

11 

Data Out Circuit Shield 

 

3 

Data Out Circuit A  

12 

Data In Circuit B 

 

4 

Data In Circuit Shield 

13 

Voltage Plus (+) 

 

5 

Data In Circuit A   

14 

Voltage Shield 

 

6 

Voltage Common   

15 

Control Out Circuit B 

 

7 

Control Out Circuit A 

SHELL  Protective Ground 

 

8 

Control Out Circuit Shield (conductive shell) 

 

9 

Control In Circuit B 

NOTES:       1) 

Voltage Plus (pin #13) and Voltage Common (pin # 6) use a single  

 

 

twisted pair in the AUI cable. 

 

      2) 

Pins 4, 8, 11 and 14 may be connected to pin #1.