Specifications

Hardware Reference 43
C613-03058-00 REV A
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
AR740 Router
The AT-AR740 router consists of a base CPU card, enclosure, and power
supply. The base CPU card supports two 10/100 autosensing Ethernet LAN
ports and two asynchronous RS-232 ports.
AT-AR740s have a Network Service Module (NSM) bay and two Port Interface
Card (PIC) bays. The NSM bay is PCI based to provide support for a number of
higher density or higher performance interfaces.
NSMs with fixed ports are available (e.g., AT-AR041 and AT-AR042 BRI S/T
NSMs) as are NSMs with PIC bays (e.g., AT-AR040 4 PIC NSM) for flexible
expansion options. The PIC bays and the 4-PIC NSM can accommodate
combinations of the following PICs (with a maximum of two E1/T1/PRI
cards):
■
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-AR023 SYN PIC, one Synchronous port with universal 50-way
AMPLIMITE connector.
■
AT-AR024 ASYN4 PIC, four Asynchronous ports with RJ-45 connectors.
AT-AR022 ETH PICs and AT-AR026 4ETH PICs are not recommended for use in the
NSM PIC bays, as performance of these interfaces is likely to be reduced and packet loss
may occur.
AT-AR740 routers have dedicated MAC and PAC slots. The MAC slot can
accommodate any one of the following MACs:
■
AT-AR010 EMAC, Encryption MAC card.
■
AT-AR011 ECMAC, Compression/Encryption MAC card.
■
AT-AR011 V2 ECMAC, Compression/Encryption MAC card.
■
AT-AR012 CMAC, Compression MAC card.
MACs should only be installed by authorised service personnel. Unauthorised
opening of the router lid may cause danger of injury from electric shock, damage
to the router, and invalidation of the product warranty.