Ar725 Router - Allied Telesis AR Series Hardware Reference Manual

40
The Main System
Main features of the AT-AR720 base CPU card are:
50 MHz RISC processor.
1 MByte of EPROM.
16 MBytes of synchronous DRAM.
4 MBytes of flash memory, expandable to 8 MBytes for early models.
128 KBytes of battery backed SRAM.
A high performance 10/100 Fast Ethernet LAN port.
2 RS-232 asynchronous serial ports.
2 PIC bays.
A MAC compression/encryption card slot.
The Ethernet LAN port is an autosensing 10/100 full duplex interface. The
router auto-senses which interface type is in use.
The two asynchronous serial ports can be used as general purpose ports for
terminals, printers, or modems. They are effectively identical and can be
independently configured. The default communications settings are:
• 9600 bps
• 8 data bits
• 1 stop bit
• No parity
• Hardware flow control
Port 0 can optionally be used for diagnostics or can automatically output the
router start-up messages, by altering the internal DIP switch settings described
in "Diagnostics" on page 106.

AR725 Router

The AT-AR725 router consists of a base CPU card, enclosure and power supply.
The base CPU card supports dual 10/100 autosensing Ethernet LAN ports and
two asynchronous RS-232 ports. The chassis has two Port Interface Card (PIC)
bays, which can accommodate any combination of the following PICs:
AT-AR020 PRI E1/T1 PIC, one Primary Rate E1/T1 port.
AT-AR021(S) BRI-S/T PIC, one Basic Rate ISDN S/T port.
AT-AR021(U) BRI-U PIC, one Basic Rate ISDN U port.
AT-AR022 ETH PIC, one Ethernet LAN AUI/10BASE-T port.
AT-AR023 SYN PIC, one Synchronous port with universal 50-way
AMPLIMITE connector.
AT-AR024 ASYN4 PIC, four Asynchronous ports with R-J45 connectors.
AT-AR026 4ETH PIC, four 10BASE-T/100BASE-TX ports with RJ-45
connectors.
AR Router
C613-03031-01 REV E