User`s guide

Features
24
RealPort software
Digi devices use the patented RealPort COM/TTY port redirection for Microsoft Windows.
RealPort software provides a virtual connection to serial devices, no matter where they reside on
the network. The software is installed directly on the host PC and allows applications to talk to
devices across a network as though the devices were directly attached to the host. Actually, the
devices are connected to a Digi device somewhere on the network. RealPort is unique among
COM port re-directors because it is the only implementation that allows multiple connections to
multiple ports over a single TCP/IP connection. Other implementations require a separate TCP/IP
connection for each serial port. Unique features also include full hardware and software flow
control, as well as tunable latency and throughput. Access to RealPort services can be enabled or
disabled.
Encrypted RealPort
Digi devices also support RealPort software with encryption. Encrypted RealPort offers a secure
Ethernet connection between the COM or TTY port and a device server or terminal server.
Encryption prevents internal and external snooping of data across the network by encapsulating the
TCP/IP packets in a Secure Sockets Layer (SSL) connection and encrypting the data using
Advanced Encryption Standard (AES), one of the latest, most efficient security algorithms. Access
to Encrypted RealPort services can be enabled or disabled. Digi’s RealPort with encryption driver
has earned Microsoft’s Windows Hardware Quality Lab (WHQL) certification. Drivers are
available for a wide range of operating systems, including Microsoft Windows Server 2003,
Windows XP, Windows 2000, Windows NT, Windows 98, Windows ME; SCO Open Server;
Linux; AIX; Sun Solaris SPARC; Intel; and HP-UX. It is ideal for financial, retail/point-of-sale,
government or any application requiring enhanced security to protect sensitive information.
Alarms
Digi devices can be configured to issue alarms, in the form of email message or SNMP traps, when
certain device events occur. These events include certain data patterns being detected in the data
stream, and cellular alarms for signal strength and amount of cellular traffic for a given period of
time. Receiving alarms about these conditions provides the advantage of notifications being issued
when events occur, rather than having to monitor the device on an ongoing basis to determine
whether these events have occurred. Alarms can also be forwarded to iDigi Manager Pro for
display and management in that platform. For more information on configuring alarms, see
"Alarms" on page 146.
Modem emulation
Digi devices include a configuration profile that allows the device to emulate a modem. Modem
emulation sends and receives modem responses to a serial device over TCP/IP (including Ethernet
and Cellular instead of Public Switched Telephone Network (PSTN). The modem emulation
profile allows maintaining a current software application but using it over the less expensive
Ethernet network. In addition, Telnet processing can be enabled or disabled on the incoming and
outgoing modem-emulation connections.The modem-emulation commands supported in Digi
devices are documented in the Digi Connect Family Command Reference.