Specifications

Dialogic
®
DSI SS7MD Network Interface Boards Programmer's Manual Issue 4
57
4.4.1 API_MSG_RX_IND - Received Data Indication
Synopsis
Message sent from MTP2 to MTP3 containing valid received Message Signal Units
(MSU). This message may be visible to the user when tracing is enabled. The message
is also used when monitoring LSL or HSL to convey the received MSU to the user.
Format
MESSAGE HEADER
Field Name
Meaning
type
API_MSG_RX_IND (0x8f01)
id
l3_link_id
src
MTP2 module ID/
dst
Links upper module ID
rsp_req
0
hclass
0
status
0
err_info
0
next
0
len
Number of octets in the received frame
PARAMETER AREA
Offset
Size
Name
0
len
For terminated operation when the message is passed between
MTP2 and MTP3 this field contains the MSU data in binary
commencing with the Service Information Octet (SIO) and formatted
in accordance with Q.703.
For monitored LSL & HSL this field contains the full Signal Unit
commencing with the layer 2 header and formatted in accordance
with Q.703.
This field does not include the CRC.
Description
Message generated by MTP2 containing the Signaling Unit data received on the
specified link. Note that ATM monitoring the format of the parameter area is different
and this is described in section 4.5.4 API_MSG_RX_IND - Received AAL5 Monitoring
Data Indication