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ROSS
MN/13070
Appendix D: ROAM Protocol
The ROAM protocol is simple, efficient, and flexible open standard. The protocol messages are
limited to a minimum control set required by ROSS to perform satellite handoffs and monitor
status.
ROSS ACU Configuration
For the roam ACU type, the configuration options are port, IP address, and port number. The
port type is "udp" and the default port is 49184. For example, using the ACU Configuration
value of "udp
" configures ROSS to communicate with any ACU
172.18.140.50 49184
equipped with the ROAM protocol.
CDM-570 Satellite Signal Identifier Connection
The modem rear panel RX Traffic Alarm indicator connector pin 15 (RX-NC, Locked) is pulled
low (grounded) by the modem when demodulator lock is detected, this is used as a positive ID to
the antenna controller to stop tracking and peak on signal. When RX Traffic is faulted, (RX-NO,
Unlocked) the signal to the ACU is open and may require a logic pull-up to signal a high
indicating demodulator unlocked condition.
SLM-5650A Satellite Signal Identifier Connection
The modem rear panel Auxiliary connector J9-HD-15F (Rx TTL Fault) is logic Low when not
faulted indicating demodulator lock, this is used as a positive ID to the antenna controller to stop
tracking and peak on signal. When RX is faulted, the signal to the ACU is open and may require
a logic pull-up to signal a pulled high indicating demodulator unlocked condition.
Note interconnect wiring will vary depending on ACU equipment.
For more information on ROAM protocol refer to "ROAM Protocol ICD_R1.5" document.
Comtech EF Data, Vipersat Products
Page 84 of 87
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