Envoy Configuration and Management Manual

Introduction to Envoy
Envoy Configuration and Management Manual—429861-001
2-5
PROCESS, DEVICE, and PROFILE Objects
PROCESS, DEVICE, and PROFILE Objects
In the WAN subsystem, you can change the line-handler process modifiers in two ways:
•
By defining a new PROFILE object and using the ADD PROFILE command to
specify the modifiers.
•
By using the ADD DEVICE command to specify the modifiers.
See the WAN Subsystem Configuration and Management Manual for details about these
two methods of changing line-handler process modifiers.
WAN Subsystem Configuration Database
The WAN subsystem configuration database stores the PROFILE objects (containing the
Envoy line-handler process modifiers) and the DEVICE objects. (Throughout the
remainder of this manual, the WAN subsystem configuration database is called the
configuration database.)
SCF Command Routing
The Subsystem Control Process (SCP) routes an SCF command to the correct subsystem
based on the object name in the command. In the following example, SCP sends the
ADD DEVICE command to the WAN subsystem based on the object name (#ENV01):
-> ADD DEVICE $ZZWAN.#ENV01...
Similarly, in the next example, the SCP sends the STATUS LINE command to the
Envoy subsystem based on the object name ($ENV01):
-> STATUS LINE $ENVO1
Protocols Supported
With Envoy, your application program can use the Compaq system as the following
kinds of stations:
•
Primary station in a point-to-point network
•
Secondary station in a point-to-point network
•
Supervisor station in a centralized multipoint network
•
Tributary station in a centralized multipoint network
Table 2-1
summarizes the combinations of protocols, line configurations, and
concentrator types that Envoy supports.