Allied Telesis AR Router Series, Справочник по аппаратуре

Страница: 90 / 111

90 AR Router
C613-03031-01 REV E
Figure 51: RJ-45 loopback plug for testing asynchronous interfaces.
Figure 52: DB9 female loopback plug for testing asynchronous ports with DB9
male connectors.
Table 38: Loopback plug pin wiring diagrams.
Physical Interface Loopback Method/Pin Wiring Diagram
RJ-45 asynchronous interface Figure 51 on page 90
DB9 Male Figure 52 on page 90
DB9 Female Figure 53 on page 91
Ethernet AUI interface Figure 54 on page 91
Ethernet TP interface Figure 55 on page 91
Basic Rate ISDN interface Figure 57 on page 93. Most BRI interfaces are
tested without a loopback plug. See “Loopback
Plugs for BRI Interfaces” on page 92 for
instructions on how to determine if a loopback
plug is required.
Primary Rate 75
Ω
interface Use a length of terminated cable as a loopback
cable on the interface.
Primary Rate 120
Ω
interface Figure 56 on page 92
RJ45 Asynchronous Port Loopback Plug (RJ45 connector)
1
2
3
4
5
6
7
8 (RING)
(DCD)
(DTR)
(GND)
(RXD)
(TXD)
(CTS)
(RTS)
1 2 3 4 5 6 7 8
Router end view
of plug
RJ45LOOP
DB9 Male Asynchronous Port Loopback Plug (DB9 female connector)
1
2
3
4
5
6
7
8
9
DB9FLOOP
Pin 9
Pin 6
Pin 5 Pin 1
DB9 Female — Pin View