Hardware Reference

11

If you are unsure of whether to terminate the line or not, contact your ISDN service provider or your authorised Allied Telesis distributor or reseller.

Warning Do not attempt to change any jumpers on the NSM while the switch or router is connected to a power supply or a live network. Disconnect the mains power supply, any redundant power supply, and any cable attached to the ISDN ports of the NSM. Dangerous voltages may be present on some parts of the NSM board, even if the switch or router is powered off.

The BRI interfaces use RJ-45 connectors. Table 3 shows the pinout of the BRI interfaces.

Table 3: Pinout of the Basic Rate ISDN S/T interfaces

Pin

S/T Interface Functions

 

 

1

-

 

 

2

-

 

 

3

TX+

 

 

4

RX+

 

 

5

RX-

 

 

6

TX-

 

 

7

-

 

 

8

-

 

 

ISDN S/T Interface Cables

Figure 6 on page 11 shows how to wire a cable to connect a Basic Rate Interface (BRI) to the ISDN network terminating equipment (NT).

Figure 6: Pin wiring diagram for an ISDN Basic Rate straight-through Interface cable

 

RJ45

 

 

RJ45

 

(to switch or router)

 

(to NT)

 

Not connected

1

1

Not connected

Not connected

2

2

Not connected

TX+

3

3

RX+

TX-

6

6

RX-

RX-

5

5

TX-

RX+

4

4

TX+

Not connected

7

7

Not connected

Not connected

8

8

Not connected

Notes:

(1)Output from switch or router; Input to switch or router.

(2)Use twisted pair cable, with pairs 3 and 6, and 4 and 5.

(3)Each wire is connected to the same pins at each end.

(4)Cable version 1.0.

BRI1NT

C613-03022-00 REV K

Page 12
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Allied Telesis AT-AR042, AT-AR048, AT-AR040-10, AT-AR041 manual Isdn S/T Interface Cables, RJ45 To switch or router To NT

AT-AR040, AT-AR040-10, AT-AR048, AT-AR041-00, AT-AR041 specifications

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