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2 OVERVIEW
Figure 2-2 — OOB data flow through the OM 2000
' Ethernet ^ |
OOB data RS-232 | | Padcet^
(blocked) 1 RS-530 I multiplexing
■ 1
R F
m o d u l a t i o n
I
>
a n d
J u p c o n v e r s i o n
Input data blocking
Emergency Ethernet Messaige storage - Emergency
a l e r t d a t a ^ a n d p a c k e t ♦ a l e r t l o g i c
g e n e r a t i o n
R e m o t e c o n t r o l u n i t
Receiving OOB Data Inputs
The OM 2000 can receive OOB data through nnultiple input ports. All data ports are
located on the back panel, and each has a unique numeric identifier. Table 2-1
describes the OM 2000 input ports:
Table 2-1 — OM 2000 input ports
P o r t
T y p e
F
R S - 2 3 2 D B 9 p i n s e r i a l d a t a 1
(Front)
R S - 2 3 2 D B S p i n s e r i a l d a t a 2
(Rear)
P o r t I D D e s c r i p t i o n
A standard RS-232 serial data port for an external
terminal (console) port is used for internal diagnostics.
A standard RS-232 serial data port (asynchronous only)
receives EPG information, code download, and other
OOB data types. In some systems, an RS-232 port is
configured to receive cable-terminal control-stream
information instead of, or in conjunction with, the
Ethernet port.
E t h e r n e t 1
The standard Ethernet port is the primary input to the
OM 2000. Because it is an Ethernet connection, port 3
supports communication with multiple devices over
the same physical port.
Generator port
The MPEG message generator is a virtual input only
port that supplies MPEG messages at periodic
intervals to the output ports configured by the
datapipe. The control interface sets the insertion
interval, availability status, and the message data.
R S - 5 3 0 D B 2 5 s e r i a l d a t a
The RS-530 serial data port is an expansion port that
can be used in the same way as port 2. Like the
standard serial data ports, port 4 can be configured for
input or output operation.
Not supported in initial release.
9
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