Operating Manual

PRELIMINARY FCC ID: BIB61201001 DESCRIPTION 2-7
PRELIMINARY MCC-6120 SDR Packet Data Radio Network
assigned one of the port numbers out of the given port number set when they send IP packets to
the public Network. Address translation happens using the public IP address and newly assigned
port number.
ASCII (TELNET)
The ASCII protocol is basically a dumb serial protocol transported over a TCP connection. This
is useful for connections to maintenance terminals that use XTERMW.EXE as a terminal
emulator.
MSC Protocol Suite
The Master Station Control (MSC) protocol suite is a set of packet protocols that can be used on
any RS-232 port as well as transported over any TCP connection. The suite is composed of three
packet protocols that operate much like UDP, in that data is transported from source to
destination without establishing an end-to-end TCP/IP connection first. The source and
destination addressing uses 16-bit Radio ID’s instead of IP addresses.
MSC is the original packet protocol and operates with a stop-and-wait link layer where each
packet is sent by first asking permission, then sending the packet if permitted.
MSC2 is an extension of MSC. It uses the same packet-body message and command layer
formats, but uses a windowing type of link layer to achieve higher throughput.
MSC3 is an extension of the command layer formats to allow MSC or MSC2 link layer
connections to operate on multiple ports.
WIFI, AP, AD-HOC, Wireless Security
The WIFI port (802.11b) can be set up to connect to an Access Point (AP) in Infrastructure
mode, or to other WIFI devices in ad-hoc mode. The WIFI port can not operate in both modes at
once. An option can set the port to AUTO mode where it will use an AP if one is in range, or
else it can use an ad-hoc connection. The choice of SSID strings is user-configurable.
Once connected, the WIFI link operates like the Ethernet links with full TCP/IP capability. The
host processors connected to an Ethernet port will be able to connect through the CMU and WIFI
line to IP addresses on the WAN that the AP is connected to. Roaming between access points is
not yet supported.
Two security options, WEP and WPA, are available (in addition to no security):
WEP Wired Equivalency Privacy – This mode uses a password to act as an encryption
key. If a 5-byte key is used, then 64-bit encryption is utilized. If a 13-byte key is
used then 128-bit encryption is utilized. The WEP key is entered in hexadecimal
format using only 0-9 and A-F characters. Authentication must be handled at the
application level.