9: Device Ports
EMG™ Edge Management Gateway User Guide
191
Key Sequences
The default values for the various key sequences (Escape Sequence, Break Sequence, View Port
Log Sequence, Power Menu Sequence) are set to different key sequences, and it is
recommended that they always be set to different key sequences so that the EMG can properly
handle each of the functions accessed by the key sequence while connected to a device.
For example, if the View Port Log Sequence is set to the same sequence as the Power Menu
Sequence, and this sequence is typed while connected to a device port, both the Power Menu and
the option to display Port Log will be displayed, with the Power Menu taking precedence and
processing user input.
If any of the key sequences are set to the same value, the precedence used to process the key
sequences is:
Escape Sequence
Power Management Sequence
View Port Log Sequence
It is also recommended that the key sequences not share a significant amount of overlap other
than the first character. For example, if the View Port Log Sequence is set to
ABCD
and the Power
Management Sequence is set to
ABCE
, the first three characters of both sequences are the same
- this is not recommended.
When any portion of key sequences overlap, typing a complete escape sequence for one of the
sequences will reset recognition of the other sequences back to the beginning of the key
sequence. For example, with the default View Port Log sequence of
ESC-V
and the default Power
Management sequence of
ESC-P
, if the user types "ESC-V" and views the port log and then
returns to interacting with the device, they need to type "ESC-P" to view the Power Menu, and not
just "P".
When detecting key sequences, after receiving the first character(s) of a sequence, the EMG will
wait 3 or more seconds for the remaining characters, before timing out and sending all characters
to the device. For example, if the Escape Sequence is
ABCD
, and the user types "AB", the EMG
will wait at least 3 seconds for the next character ("C") before timing out and sending the "AB"
characters to the device.