Dialogic DSI SPCI Network Interface Boards Especificações descarregar pdf (Página 70)

4 Message Reference

Parameters

A description of the permitted parameter values are given below. When the board is

initially configured, all the LIUs are initialized to a disabled condition. The

LIU_MSG_CONFIG message includes the following parameters:

liu_type

The physical interface type. The preferred method for configuring an E1 interface is to

set a value of 5. The following table shows the permitted values and their meanings.

Value

Description

Disabled (used to deactivate a LIU). In this mode, the LIU does not produce an output

signal.

E1 120ohm balanced interface

T1 (including J1)

E1 120ohm balanced interface

line_code

The line coding technique. The following table shows the permitted values and their

meanings.

Value

Description

HDB3 (E1 only)

AMI with no Zero Code Suppression

AMI with Zero Code Suppression

The appropriate bit in the clear_mask parameter may be set to disable Zero Code

Suppression for individual timeslots if required (T1/J1).

B8ZS (T1/J1)

frame_format

The frame format. The following table shows the permitted values and their meanings.

Value

Description

E1 double frame (E1 only)

E1 multiframe (E1 only)

D3/D4 (Yellow alarm = bit 2 in each channel; T1 only)

ESF (Yellow alarm in data link channel); T1 only)

J1 frame format. (liu_type must be 4; T1)

Unstructured (HSL)

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 ... 124 125

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