Wegener Communications UNITY 4600 - Manual (Page 29)

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Unity 4600 User’s Manual
Device
handling Terminal I/O - The Terminal device is used for command and control of the Unity 4600 . This
I/O is a basic VT100-like emulation. All I/O is prompted by user-input text strings terminated
in carriage-returns. The terminal, whether local or remote (via modem or telnet over TCP/
IP), should be set to local echo ON. The unit only echoes a carriage-return/linefeed and then a
‘>’ prompt after user entry.
Modem I/O - The Modem device operates in a similar manner to the Terminal device.
Whereas the Terminal device was limited to a specific configuration, the modem device may
be set to one of several. The Modem device does not use special handshaking or special
control characters, and only supports auto-answer modems. To access the modem
command interface, the serial-port device must first be set to Modem. The "Terminal/IO"
discussion above on emulation and echoing would then apply. The user would send the unit
a carriage return and then the unit would return a prompt to enter the "modem password". If
the correct password is entered, then modem access is enabled. Upon enabling modem
access, the
Unity 4600 will output a welcome banner. After that, I/O is indistinguishable from
normal terminal access, with the same restriction on local user access as set by the
Network. Modem access is disabled when either (1) a new input serial-port device is
selected, (2) when there is no user input for 10 minutes, (3) the OH command is received, or
(4) the unit is reset.
Aux Data - The Aux Data device is defined to allow for async data streams to be carried
within the transport stream and their raw payload output on an IRD serial port. The PID of
these streams may or may not be assigned to a program number within a PMT. To recover
the data, the IRD need only be given the PID and baud rate. The range of legal PIDs is
established by the ISO 13818 standard as 20 to 1ffe (hex). This may be performed either by
COMPEL
®
command or by the local user (if local control is enabled).
COMPEL
®
- This device is defined to allow for input of the COMPEL control stream (for
testing only). There is no output.
PRINTER OUTPUT - This is an output-only device. For the Printer device, there are three
legal types: COMPEL-requested Reports, COMPEL E-mail, and Raw COMPEL (binary)
Data. The first output type are IRD status reports identical to those that the local user may
request. These are always available for the Printer device. The second output type must be
enabled by a non-volatile control. The last type, Raw COMPEL, must also be enabled by a
non-volatile control (actually a factory setting that can only be modified with debug access).
It is exclusive of the other outputs (the others are not allowed if dumping Raw COMPEL).
For this type, the COMPEL data stream, while being processed normally by the IRD host
processor, is also output as-is to the Printer device. This data is binary and includes non-
printing characters.
Aux Data Configured to B, P, 8, 1. This is an output only (all inputs ignored).
Local
COMPEL
Configured to B, P, 8, 1. This is an input for testing only.
Printer Configured to B, P, 8, 1. This is an output only.
The legal values for B are: 1200, 2400, 4800, 9600, 19.2k, or 38.4 kilobaud.
The legal values for P are: ‘O’, ‘E’, or ‘N’ for Odd, Even, or No parity.
Device Serial Port Behavior (Italics are Programmable, Bold are Fixed)