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OPERATING THE ACU
M ODEM PORT PROTOC OL
ETHERNET I /O CONSOLE
5. MODEM PORT* is to select a proper data communication port on the ACU to interface
with the modem.
PROTOCOL*
I/O CONSOLE: is a protocol for interchanging of information (GPS Out, TX mute, and
modem lock) between the ACU (through Console port) and a modem.
OPEN AMIP: is an ASCII based protocol developed by iDirect for interchanging of
information between the ACU and a modem. OpenAMIP is not intended for any purpose
except to allow the ACU and a modem to perform synchronized automatic beam
switching (ABS).
SERIAL GPS: is a protocol for sending GPS Out information from the ACU (through
RS232/422 port) to a modem.
ROSS: ROSS Open Antenna Management (ROAM) protocol is developed by Comtech
EF Data Cooperation to offer common management interface for Comtech EF Data's
Roaming Oceanic Satellite Server (ROSS) and ACU.
VCAP: is the interface between the SatLink mobile VSAT IDU and the Intellian antenna
controllers for Intellian mobile antennas.
6. GPS OUT SENTENCE* is to select the GPS OUT SENTENCE type USE TX MUTE is
to select whether or not to USE TX MUTE function from the satellite modem. A transmit
inhibit output from the ACU will disable/mute the modem transmit via a voltage whenever the
antenna is blocked, searching, or is mis-pointed 0.5 degrees from the peak satellite position.
Set modem protocol
Use TX mute
G PS O UT SENTE NCE USE TX MUTE
G P G L L YES
GPS OUT SENTENCE*
GPGLL
GPGGA
SIMPLE GPGGA
MODEM PORT*
ETHERNET
RS422
RS232
PROTOCOL* is to select a proper communication protocol on the ACU to interface with the
modem.
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