Expand Configuration and Management Manual (G06.24+)

Subsystem Description
Expand Configuration and Management Manual—523347-008
18-50
Connection Establishment
Connection Establishment
Figure 18-16 illustrates the events that occur when Expand-over-NAM, Expand-over-
ServerNet, and Expand-over-FOX line-handler processes successfully establish a
connection through a NAM interface.
Bind Requests and Subdevices
Before an Expand-over-NAM, Expand-over-ServerNet, or Expand-over-FOX line-
handler process can begin exchanging data with another Expand line-handler process,
it must first access a subdevice of the NAM process.
Figure 18-16. Expand-Over-NAM Connection Establishment
Note. If the NAM process is an X25AM line-handler process, subdevices are associated with
each line that is controlled by the X25AM line-handler process. X25AM subdevices enable
applications to communicate over a virtual circuit. An X25AM subdevice is roughly analogous
to a virtual circuit.
Active and Passive Connect Type Passive Connect Type
024VST
Expand line-
handler process
can send and
receive data
Connection
established
Connection
established
NAM receives
connect
request
Expand line-handler
process sends
active connect
Expand line-handler
process sends
passive connect
Expand line-
handler process
sends bind
request