Envoy Configuration and Management Manual

Subsystem Control Facility (SCF) for Envoy
Envoy Configuration and Management Manual—429861-001
4-7
Envoy Object States
DEVICE
For Envoy, the DEVICE object represents the line-handler process. Starting the
DEVICE object in the WAN subsystem launches the line-handler process object in the
Envoy subsystem. The line-handler process inherits the DEVICE object’s modifier and
attribute definitions.
The DEVICE object has attributes specifying how the DEVICE runs as a process, such
as which CPU the process runs in and which concentrator the process uses. One
specifiable attribute of the DEVICE object is the PROFILE object.
PROCESS
A PROCESS object defines an Envoy line handler. PROCESS object names must take
the format $Axxxxxx where A is an alphabetic character and xxxxxx is up to six
alphanumeric characters. The PROCESS object name is the same as the corresponding
LINE object name and must be unique within a system. An example is $ENV1.
LINE
A LINE object defines a communications line controlled by Envoy and is named
automatically with the same name as the PROCESS object. LINE object names must
take the format of $Axxxxxx, where A is an alphabetic character and xxxxxx is up to six
alphanumeric characters. An example is $ENV1.
How to Determine Envoy Object Names
To determine the names assigned to PROCESS and LINE objects, enter one of the
following command at the SCF prompt:
-> LISTDEV TYPE 7
-> LISTDEV ENVOY
Envoy Object States
LINE objects can be in the following states:
STARTED
The LINE object enters the STARTED state when the START command completes
successfully.
STOPPED
When a LINE object is in the STOPPED state, there are no links either to or from the
LINE object and the LINE is not ready for normal operation. Application requests, such
as READ, WRITE, CONTROL, and OPEN do not flow while an object is in the
STOPPED state. However, you can alter most configuration attributes while the object is
in the STOPPED state.
Note. ENVOY is the Envoy subsystem keyword for online help.