Sierra Video 3232HD-3G - Manual (Page 56)

SIERRA VIDEO
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The simplest possible command string would be:**!! which consists of the leader and trailer
characters. This command string would generate the response:
** OK !!
This can be useful for verifying that the communication to the routing switcher is operational.
If an error occurs within a command string, the remainder of the command string is ignored and
the routing switcher returns the string “ ERROR ", followed by an optional descriptive string
followed by a string of trailer characters, to the host.
The simplest error response is one with no optional descriptive string. For example, this
command string:
** XXX !!
might generate this response from the routing switcher:
** ERROR Syntax: No Number:XX !!