Specifications

30 AR400 Series Router
C613-03086-00 REV A
Asynchronous interfaces follow the RS-232 standard. A range of speeds is
selectable using the set port command (Interfaces chapter, Software Reference).
Not all signals need to be connected. In particular, both DCD and CTS are not
required unless the interface has been specifically set up to use them. See the
Terminal Server chapter, Software Reference for more details. A typical terminal
connection requires only RXD, TXD and GND, but refer to the equipment
manual for the connected device for more specific data.
Cables and Loopback Plugs
This section describes how to make cables for connecting the router to
networks, terminals, and printers. It also describes loopback plugs, which are
required for testing most router interfaces.
RS-232 terminal and modem cables
The following table lists the wiring diagrams to follow when constructing
terminal and modem cables for various connector and port combinations for
asynchronous ports.
The RING input is available only on asynchronous ports on expansion cards. It
is not available on asynchronous ports on base CPU boards.
Table 1-10: Pinout of the RJ-45 connectors on asynchronous interfaces (pins are numbered
from left to right).
Pin Function Signal Direction
1 RING Input to router (only available on expansion card interfaces)
2 DCD Input to router
3 DTR Output from router
4GND
5 RXD Input to router
6 TXD Output from router
7 CTS Input to router
8 RTS Output from router
Table 1-11: Terminal and modem cables.
Cable Figure
RJ-45 (router) to DB25 female (terminal) cable Figure 1-10 on page -31
DB9 female (router/DTE) to DB9 female (PC/terminal/DTE) null modem cable Figure 1-11 on page -31
DB9 male (router/modem/DCE) to DB9 female (PC/router/terminal/DTE) cable Figure 1-12 on page -32
DB9 male (router/DCE) to DB9 male (modem/DCE) cable Figure 1-13 on page -33
RJ-45 (router) to DB25 male (modem) standard modem cable Figure 1-14 on page -33
R-J45 (router) to MiniDin (Macintosh) Figure 1-15 on page -34