Specifications

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DSI SS7MD Network Interface Boards Programmer's Manual Issue 4
49
ts_mask
A 32-bit timeslot mask where each bit position represents a local stream timeslot to be
connected to the cross connect switch. The least significant bit (bit 0) represents
timeslot 0. The arrangement of CPU local bus stream timeslot connections to cross
connect switch channels is controlled by the mode parameter.
mode
The mode of operation that controls how the switch channels are allocated. Typically,
when mode is set to 1, the first timeslot connected to the switch is connected to the
timeslot indicated by sc_channel and each subsequent timeslot that is connected will
be connected to the next switch channel. This allows maximum utilization of channels
on the switch.
An alternative, with mode set to 2, which should only be used if there is a specific
requirement for it, associates (but does not necessarily connect) timeslot 0 on the LIU
with the switch timeslot specified by sc_channel and subsequent timeslots on the LIU
with subsequent switch channels. Connections are only made when the corresponding
bit in the timeslot mask is set to 1. This mode of operation preserves the spacing
between timeslots that was originally found on the T1/E1/J1 interface, but does result
in a number of switch channels not being used.
4.3.6 MVD_MSG_SC_LISTEN - Cross Connect Switch Listen Request
Synopsis
Establish a connection from an cross connect switch channel to an outgoing timeslot on
an T1/E1/J1 Line Interface Unit (LIU).
Format
MESSAGE HEADER
Field Name
Meaning
type
MVD_MSG_SC_LISTEN (0x7e17)
id
0
src
Sending module's Id
dst
MVD_TASK_ID
rsp_req
Used to request a confirmation
hclass
0
status
0
err_info
0
len
6
PARAMETER AREA
Offset
Size
Name
0
2
liu_id
2
2
timeslot
4
4
sc_channel
Description
This message is sent to the board to establish a connection between a switch channel
to an outgoing timeslot on the T1/E1/J1 LIU.