Specifications

3 SS7HD Board Product Specific Configuration and Operation
36
Figure 1. CT Bus Connections
When a call clears, the application needs to initiate generation of the fixed Idle pattern
towards the network operation and may wish to connect an Idle pattern to the
resource board.
3.4.3 Static Initialization
Static initialization is handled by the s7_mgt protocol configuration utility. For each
T1/E1/J1 Line Interface Unit (LIU), the user should include an
LIU_SC_DRIVE command in the config.txt protocol configuration file.
The LIU_SC_DRIVE command has several parameters. The board_id and liu_id
parameters together uniquely identify the affected LIU. The sc_channel parameter is
the channel number of the first channel on the CT Bus that is to be used for timeslots
from the specified LIU. The ts_mask parameter is a mask identifying which timeslots
on the T1/E1/J1 interface are carrying voice circuits (as opposed to signaling) and
therefore need to be connected to the CT Bus. The least significant bit of ts_mask
should always be 0 when driving from an T1/E1/J1 interface.
As an example, consider a two board system where the first board has four E1 ports
and the second board has four T1 ports. We allow the first 512 CT Bus channels to be
used by other boards in the system and therefore start at sc_channel 512.