Specifications

3 SS7HD Board Product Specific Configuration and Operation

3.3.1 Configuration

The user needs to set up the configuration for the T1/E1/J1 interface and the operating

parameters for each link to be monitored. This can all be achieved using the config.txt

file in conjunction with the s7_mgt configuration utility. Users wishing to use discrete

message-based configuration should refer to Section A.2, “Monitoring Configuration

Using Individual Messages” on page 122 of this manual.

3.3.2 Run Time Operations

Once configured, whenever a frame is received, it is reported to the user’s application

as an API_MSG_RX_IND message.

During operation, the user may also read (and optionally reset) various statistics on a

per-link basis by sending a Link Statistics Request (DVR_MSG_R_L1_STATS) message.

3.4 Using the CT Bus

The Dialogic

DSI SS7HD Network Interface Boards support multiple T1/E1/J1 Line

Interface Units (LIUs) and a CT Bus interface (H.100 or H.110). The on-board signaling

processor handles the SS7 signaling timeslots, while the remaining circuits (voice or

data bearer circuits) are passed to the CT Bus for distribution to other boards.

Note: The DSI SS7HDCN16W board has no signaling processors and therefore all timeslots

configured are typically terminated for connection to the H.110 CT Bus.

All communication between the application and the board is message based. Initial

configuration is typically handled by the s7_mgt protocol configuration utility that takes

commands from the config.txt protocol configuration file and generates all the

necessary configuration messages for the board. Subsequent operation is entirely

message driven; messages being passed in both directions between the board and the

application.

One of the roles of the application is to control the dynamic switching between the CT

Bus and the T1/E1/J1 line interfaces. This section provides details of how to interface

with the CT Bus, including the initial (static) configuration and the subsequent

(dynamic) switching.

The operation of the CT Bus switching interface is described in terms of the SCbus

switching model using:

• MVD_MSG_SC_DRIVE_LIU, MVD_MSG_SC_LISTEN and MVD_MSG_SC_FIXDATA

messages

• LIU_SC_DRIVE and SCBUS_LISTEN config.txt commands