Welltech Dialogic SS7 Protocols ISUP - Manual (Page 113)

Dialogic ® SS7 Protocols ISUP Programmer's Manual Issue 15
113
7 Management Interface
7.1 Introduction
The management interface allows the user to interface with the Circuit
Supervision Control (CSC) block of the ISUP module. The interface is
message based and uses the same basic message structure as defined in the
previous section. The messages available allow the user to carry out the
following circuit supervision functions:
• Reset a circuit or circuit group
• Abort a reset cycle
• Block a circuit or circuit group
• Unblock a circuit or circuit group
• Abort a blocking/unblocking attempt
• Request the circuit status from the remote signaling point (Circuit group
query)
In the case of blocking, two circuit blocking procedures are defined. One
procedure causes immediate release of all affected circuits. This is referred
to by ITU-T as “Hardware Blocking”, and by ANSI as “Blocking with
immediate release of all circuits”. In the following sections, the term
Hardware Blocking will be used.
The second type of blocking does not cause immediate release of circuits, and
is referred to by ITU-T as “Maintenance Blocking” and by ANSI as “Blocking
without release of circuits”. In the following sections, the term Maintenance
Blocking will be used.
Commands originated by the user take the form of a Circuit Group
Supervision Request. On completion of command execution, the user
receives notification in the form of a Circuit Group Supervision Confirmation.
Events initiated at the remote end of the network are notified to the user in a
Circuit Group Supervision Indication.
When the ISUP module returns a confirmation message containing a status
value, the status will be one of the following:
Table 3. ISUP Module Confirmation Message Statuses
Value Mnemonic Description
0 none Success
1 ISPE_BAD_ID Inappropriate or invalid id in request message
5 ISPE_BAD_MSG Inappropriate or unrecognized message type.
6 ISPE_BAD_PARAM Invalid parameters contained in message.
The message structure and parameters for each message are defined in the
following sub-sections.