Ethernet Transceivers And Aui Cables - Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual

34
Macintosh serial
cable
Figure 23 shows how to wire a cable to connect an asynchronous (RJ-45) port
on the router or switch to the COM port on a Macintosh.
Figure 23: Pin wiring diagram for a Macintosh serial cable
RJ45
(to switch or router)
1
←
(DCD) 2
→
(RTS) 8
←
(RXD) 5
→
(GND) 4
→
(TXD) 6
←
(CTS) 7
→
(DTR) 3
Notes:
→ Output from switch or router; ← Input to switch or router.
(1)
(2) Cable version 1.0.

Ethernet Transceivers and AUI Cables

There are four types of Ethernet transceiver available
thick Ethernet transceiver will be remote from the router, due to the nature of
the coaxial cable, and will therefore require an AUI cable. The other types of
transceiver may be connected using an AUI cable or, if the transceiver is small
and lightweight, it may be connected directly to the AUI port on the back of the
PIC. Care must be taken to avoid strain on the AUI port connector.
Table 15: Ethernet transceivers, media, and connector types
Transceiver Type Media
10BASE-2 Thin Ethernet coaxial cable
10BASE-T Twisted pair (category 3 or better)
10BASE-F Fibre optic (dual)
10BASE-5 Thick Ethernet coaxial cable
The router may also be connected to a network via an AUI fanout. This device
has multiple AUI ports wired as transceiver AUIs and a single standard AUI
for connection of a transceiver. This allows several Ethernet devices to share a
single transceiver. An AUI cable is required if this method is used.
Transceivers have a switch or a jumper to enable or disable SQE (Signal Quality
Error, also known as heartbeat). The router does not require SQE, so it should
be disabled.
AUI cables, sometimes known as drop or transceiver cables, are available from
data cabling suppliers in a variety of lengths up to a maximum of 40 metres,
but are typically one to five metres in length. AUI cables always have one
female and one male DB15 connector and are fitted with slide lock retaining
clips to ensure a secure attachment.
Port Interface Card
MiniDin
(to Macintosh)
1
2
3
4
5
6
Not connected
7
8
MINIDIN
(Table 15). The 10BASE-5
Connector
BNC
RJ-45
ST or SMA
Vampire TAP or "N" type
C613-03023-00 REV N