Honeywell CNI2 User Manual

CNI2
O
perating and Installation
Guide
74
Also see the next discussion about port selection as this also affects the transparent mode of
operation.
When Answering if No Port
Select…….
This setting
is used
when the CNI2 is allowed to enter “transparent”
mode. In this mode the
CNI2 will establish a transparent communications link between the host system and the device
attached to one of its serial ports
(see previous discussio
ns)
. This mode is only possible if (a)
the CNI2 has been configured as a “
Transparent Modem
” or (b) the CNI2 is configured as a
Metretek or Mercury data logger
and the “
Allow Transparent
” box is checked
.
The CNI2 has one on
-
board serial port (Port
-
1).
This can be expanded to two ports using the
Serial Port Multiplexer discussed earlier in this document. Future options will allow up to 7
additional ports to be added.
Each port is assigned a unique ID number using the
Serial Port Configuration
screen,
to be
discussed shortly. Port
-
1 is automatically assigned the RUID that is assigned to the entire
CNI2. Port
-
2 and beyond are assigned unique ID numbers by you.
When the CNI2 receives an incoming connection request
,
or is paged to call
back to the cent
ral
office, it
needs to know which serial port to select for the call. Once the connection with the host
is established the CNI2 will wait a certain number of seconds
(defined by you) for a special
command to
arrive
from the host. This command has the fo
rmat:
+
-
+PAxxxxxx<cr>
w
here “xxxxxx” is the ID of one of the serial ports and <cr> is a carriage return character.
The
“xxxxxx” must contain all six digits of the RUID including leading 0’s.
If the ID
number in the command is valid
and
that port is e
nabled (via the
Serial Port
Configuration
screen), then CNI2 will return the following response:
<cr><lf>
CONNECTED TO PORT
-
xxxxxx<cr><lf>
where “xxxxxx” is the ID of the serial port, <lf> is a line feed character and <cr> is a carriage
return character
.
If the ID number in the command is not in the list, or if that particular port is not enabled (via the
Serial Port Configuration
screen), then the “
Route To
” port will be selected and the CNI2 will
return the following response:
<cr><lf>
INVALID PORT N
UMBER OR PORT IS NOT ENABLED
<cr><lf>
If the +
-
+PA command is not received within the specified time frame then the CNI2 will select a
port based on the “
Route To
” setting.

Honeywell CNI2 Specifications

General

Brand	Honeywell
Model	CNI2
Category	Recording Equipment
Language	English