Pic Interfaces; Asynchronous Interface - Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual

Hardware Reference
C613-03023-00 REV N

PIC Interfaces

This section provides detailed information on the physical and operational
characteristics of the following PIC interfaces:
■

Asynchronous Interface

■
Synchronous Interface
■
Ethernet Interface
■
Basic Rate ISDN Interface
■
Primary Rate ISDN Interface
■
VoIP FXS Interface
Asynchronous Interface
The AT-AR024 ASYN4 PIC provides four RS-232 asynchronous interfaces
using RJ-45 connectors.
interfaces.
Table 11: Pinout of the RJ-45 connectors on the AT-AR024 ASYN4 PIC
Pin* Function
1 RING
2 DCD
3 DTR
4 GND
5 RXD
6 TXD
7 CTS
8 RTS
*Pins are numbered from left to right.
A range of speeds are selectable using the set asyn command. For more
information, see the Interfaces chapter of the AlliedWare
Software Reference for your switch or router.
Not all signals need to be connected. In particular, DCD and CTS are not
required unless the interface has been specifically set up to use them. For more
information, see the Line Printer Daemon (LPD) and Stream Printing chapters of
®
the AlliedWare Operating System Software Reference for your switch or router. A
typical terminal connection will only require RXD, TXD and GND, but refer to
the equipment manual for the connected device for more specific data.
If LPD-based printer ports are required, then the switch or router may expect to
see the DTR signal from the printer connected to the DCD pin of the switch.
This is used to detect that the printer is powered on and online. This prevents
print jobs being sent to a disconnected printer and lost. For more information,
see the Line Printer Daemon (LPD) chapter of the AlliedWare
Software Reference for your switch or router.
Table 11 shows the pinout of the asynchronous
Signal Direction
Input to PIC
Input to PIC
Output from PIC
Input to PIC
Output from PIC
Input to PIC
Output from PIC
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Operating System
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Operating System