10: Device Ports
EMG™ Edge Management Gateway User Guide 231
number to use for dial-back. The EMG device will request the type of number defined by CBCP
Client Type - either an Admin-defined Number (the CBCP server determines the number to call)
or a User-defined Number (the EMG unit will provide the Fixed Dial-back Number as the number
to call). If the CBCP handshake is successful, the EMG unit will terminate the PPP connection,
hang up, and wait for the server to dial back. When the remote server calls back the EMG unit and
the PPP connection is established, the user will be authenticated via PAP or CHAP (configured
with the Authentication setting). For PAP, the Local/Remote list will be used to authenticate the
login and password sent by the PPP peer. For CHAP, the CHAP Handshake Host/User Name
and Secret/User Password will be used to authenticate CHAP Challenge response sent by the
PPP peer. Once authenticated, a PPP session will be established using either negotiated IP
addresses or specific IP addresses (determined by the Negotiate IP Address setting).
Notes:
In a state where the modem will be answering a call, the modem should always be
configured for manual answer, not auto answer.
When answering a call, the EMG unit answers after the 2nd ring.
Any text or PPP connection can be terminated by setting the modem state to disabled.
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.
To Next Page
Loading...
Need help?
General
