Dialogic® DSI SPCI Network Interface Boards Programmer's Manual Issue 5

6.3.7CT bus Listen Request

Synopsis:

Message sent to the DSI SPCI Board to establish a connection from the CT bus to an outgoing timeslot on an T1/E1 Line Interface Unit (LIU).

Message Format:

 

 

MESSAGE HEADER

 

 

Field Name

 

Meaning

 

 

 

type

 

MVD_MSG_SC_LISTEN (0x7e17)

 

 

 

id

 

0

 

 

 

src

 

Sending Module ID

 

 

 

dst

 

MVD_TASK_ID (0x10)

 

 

 

rsp_req

 

Used to request a confirmation

 

 

 

hclass

 

0

 

 

 

status

 

Status Response (if confirmation requested)

 

 

 

err_info

 

0

 

 

 

len

 

6

 

 

 

 

 

PARAMETER AREA

Offset

Size

Name

 

 

 

0

2

liu_id

 

 

 

2

2

timeslot

 

 

 

4

2

sc_channel

 

 

 

Description:

This message is sent to the DSI SPCI Board to establish a connection from the CT bus to an outgoing timeslot on the T1/E1 Line Interface Unit (LIU). It is issued by the application and is typically used at the start of each call although it may also be issued during a call to connect to a different resource.

Correct operation of this message is dependent upon the use, at initialization time, of the MVD_MSG_SC_DRIVE_LIU message (or the LIU_SC_DRIVE command in config.txt when using s7_mgt).

When a new call arrives the application uses this message to connect the appropriate resource from the CT bus out to the network. When the call finishes, the application uses the MVD_MSG_SC_FIXDATA message to generate the appropriate IDLE pattern on the LIU.

The MVD_MSG_SC_LISTEN message can also be generated at configuration time using s7_mgt as a result of the SCBUS_LISTEN command in the config.txt file. However, this only sets up a static configuration and still requires the user application to control any dynamic connections.

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Dialogic DSI SPCI Network Interface Boards manual CT bus Listen Request, Offset Size Name Liuid Timeslot Scchannel

DSI SPCI Network Interface Boards specifications

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