OSI/MHS Configuration and Management Manual

Troubleshooting Your OSI/MHS Subsystem
OSI/MHS Configuration and Management Manual—424827-003
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Event-Message Sequences for Common MHS
Functions
Notification Handler
This functional unit within the MR process produces reports in response to probes and
unroutable messages and, when required, to acknowledge deliveries. It also receives
incoming delivery and nondelivery reports.
P1 Decode
This functional unit in the MR process translates an incoming message from encoded
ASN.1 (BER) format to a local (value tree) representation.
P1 Encode
This functional unit in the MR process translates an outgoing message from its local
(value tree) representation to ASN.1 (BER) format.
Router
This functional unit in the MR process determines whether a message can be delivered
locally, or how it should be relayed, based on the O/R name and the route definitions in
the OSI/MHS configuration. It supports the route-retry mechanism, checks for closed
user group membership, and requests distribution list expansion where necessary.
UA Access Manager
This functional unit within the MR process interacts with the LO and RS processes to
provide services to local and remote user agents.
OSI/MHS Relays a Message
Figure 9-5 illustrates the steps taken when OSI/MHS relays a message. The numbers
on the figure represent the event messages in the order in which they are produced;
the description after the figure gives the actual event numbers.