Welltech Dialogic SS7 Protocols ISUP - Manual (Page 158)

Section 8 Non-Primitive Interface
158
8.19 Maintenance Event Indication
This message is issued by the ISUP module to notify system maintenance of
various protocol events in accordance with ITU-T Q.764.
Message Header
structure MSG
type ISP_MSG_MAINT_IND (0x070a)
id gid
src ISUP module ID
dst Maintenance module ID
rsp_req 0x00
hclass 0x00
status Maintenance event code (see below)
err_info Time-stamp
len 0, 1, 2 or 4
Parameter Area
parameters offset 0, size Len Event specific data
Parameters
gid
The group identifier for the Circuit Group.
Each indication may contain further Event Specific Data relating to the
event, this consists of 0, 1, 2 or 4 bytes of additional data which is contained
in the parameter area of the message. Currently the event specific data for
most events indicates the circuits to which the events apply in terms of a 32-
bit cic_mask with bits set to indicate the affected circuits within the circuit
group.
Note For reset indications, a 32-bit cic_mask is used but only the affected circuit within
the circuit group is indicated e.g. if a number of circuits are reset a maintenance
event indication message will be sent for each of the circuits reset.