Chapter 2 - Installation

Point “S”

4-8 Wires

Terminal

NT2

Point “T”

4-8 Wires

 

 

(PBX)

 

Point “S”

NT1

Point “U”

2 Wires

 

Point “S”

Terminal

Terminal

Figure 2-1 ISDN Interface Points

S/T Interface

The S/T interface uses an 8-conductor modular cable terminated with an 8-pin RJ-45 plug. An 8-pin RJ-45 jack located on the terminal is used to connect the terminal to the DSL (Digital Subscriber Loops) using this modular cable.

Table 2-1 shows the Pin Number, Terminal Pin Signal Name and SILC Pin Signal name for the S/T interface.

Pin Number

Terminal Pin Signal Name

SILC Pin Signal Name

1

Power Source 3

Not applicable

2

Power Source 3

Not applicable

3

Tx+

Rx+

4

Rx+

Tx+

5

Rx-

Tx-

6

Tx-

Rx-

7

Power Sink 2 (-)

Not applicable

8

Power Sink 2(+)

Not applicable

Table 2-1. S/T Interface Connector Specification

U Interface

The U interface uses a 2-conductor twisted pair cable terminated with an RJ-45 jack. An RJ-45 jack located on the terminal is used to connect the terminal to the Digital Subscriber Loops using this twisted pair cable.

In Table 2-2 the Pin Number, Terminal Pin Signal Name and UILC Pin Signal Names for the U interface are listed.

Pin Number

Terminal Pin Signal Name

UILC Pin Signal Name

1

Not Used

Not applicable

2

Not Used

Not applicable

3

Not Used

Not applicable

4

Tip or Ring

Tip or Ring

5

Tip or Ring

Tip or Ring

6

Not Used

Not applicable

7

Not Used

Not applicable

8

Not Used

Not applicable

Table 2-2. U Interface Connector Specification

MT128ISA/PCI

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