Specifications

34 Port Interface Card
C613-03023-00 REV P
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
Ethernet Transceivers and AUI Cables
There are four types of Ethernet transceiver available (Table 16). The 10BASE-5
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.
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.
Table 16: Ethernet transceivers, media, and connector types
Transceiver Type Media Connector
10BASE-2 Thin Ethernet coaxial cable BNC
10BASE-T Twisted pair (category 3 or better) RJ-45
10BASE-F Fibre optic (dual) ST or SMA
10BASE-5 Thick Ethernet coaxial cable Vampire TAP or “N” type
RJ45
(to switch or router)
MiniDin
(to Macintosh)
1
2
3
4
5
6
7
8
←
→
←
→
→
←
→
(DCD)
(RTS)
(RXD)
(GND)
(TXD)
(CTS)
(DTR)
Not connected
Notes:
(1) → Output from switch or router; ← Input to switch or router.
(2) Cable version 1.0.
MINIDIN
1
2
8
5
4
6
7
3