L”: routing switcher size and level names inquiry, N”: source status inquiry, O”: output status inquiry – Sierra Video Ponderosa 3G Series Routing Switcher Family with MediaNav User Manual
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**Q!!
might return the following string:
** QSmall~V2.1~ OK !!
indicating that the routing switcher model name is "Small" and the software version number is
"V2.1".
“L”: Routing Switcher Size and Level Names Inquiry
The command "L" requests that routing switcher size and level name information be returned
to the host. The information is sent as a string of characters. The first characters are a space
followed by "L", some optional values described below, then the number of outputs, a
comma, the number of levels, a comma, the number of inputs, a comma, and then the level
names, each terminated by a "~" (tilde), and the last followed by two tildes.
For example, the command:
**L!!
might return the following string:
** L64,3,32,VIDEO~AudioL~AudioR~~ OK !!
indicating that the routing switcher has 64 outputs, 3 levels, and 32 inputs, and the levels are
named "VIDEO", "Audio L", and "Audio R".
“N”: Source Status Inquiry
The command "N" requests that status information for a single source be returned to the host.
The status information is sent as one or more "Y" and/or "X" commands.
For example, the command:
**N4!!
to a router might have the following commands as its response:
** X12,4,1 X12,4,2 X12,4,3 X13,4,4 Y23,4 !!
showing that source 4 connects to
destination 12 on levels 1-3,
destination 13 on level 4, and
destination 23 on all levels.
“O”: Output Status Inquiry
The command "O" requests that the status information for a single output be returned to the
host. The status information is sent as a “Y” command or a “V” command or as a sequence of
L “X” commands, where L=number of levels.
For example, the command:
**O5!!
to a 3-level routing switcher might have the following three commands as its response:
** X65,23,1 X5,-,2 X5,0,3 !!