Expand Configuration and Management Manual (H06.21+, J06.10+)

Subsystem Description
Expand Configuration and Management Manual — 529522-013
17 - 50
Connection Establishment
Connection Establishment
Figure 17-16 illustrates the events that occur when Expand-over-NAM and Expand-
over-ServerNet line-handler processes successfully establish a connection through a
NAM interface.
Bind Requests and Subdevices
Before an Expand-over-NAM or Expand-over-ServerNet line-handler process can
begin exchanging data with another Expand line-handler process, it must first access a
subdevice of the NAM process.
Figure 17-16. 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