Welltech SPCI2S Intel NetStructure SS7 Boards Uživatelský manuál stáhnout pdf (Strana 77)

SS7 Programmer’s Manual for SPCI2, SPCI4 and CPM8 Issue 2 Page 77

5.4.3 MTP Transfer Request

Synopsis:

Primitive request sent to MTP3 to convey a Message Signal Unit (MSU) to the

board for transmission.

Message Format:

MESSAGE HEADER

FIELD NAME MEANING

type API_MSG_TX_REQ (0xcf00)

user_part_reference

src

Sending module ID

dst MTP_TASK_ID

rsp_req

hclass

status

err_info

len

Number of MSU octets in parameter area

PARAMETER AREA

OFFSET SIZE NAME

0 len MSU data in binary format ready for

transmission, commencing with the Service

Information Octet (SIO) and followed directly

by the Signalling Information Field (SIF). The

level 2 information (ie BIB, BSN, FIB, FSN LI

and FCS) is added by the board.

Description:

This message is used to convey Message Signal Units from the user part to the

Message Transfer Part (MTP) on the board for subsequent transmission into

the SS7 Network.

The user part should only issue messages to destination point codes for which

an MTP Resume indication has been received, otherwise no route is currently

available to the destination and the message will be discarded by the Message

Transfer Part in accordance with Q.704.

No confirmation messages are issued.

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Welltech SPCI2S Intel NetStructure SS7 Boards Uživatelský manuál Strana 77