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ISDN Software Reference for Linux and Windows
370
PRI Channel Initialization and Start Up
Synchronous or Asynchronous Programming
Application Device Driver State Firmware Network
OOS at power
up
F/W place B
channel to
"IN" service
state
*Maintenance
-->
MT_ACK
<--
F/W resets all
B channel in
to idle state
**Restart
-->
Call blocked Restart_ACK
<--
cc_Open( )
-->
NULL
Return with line
device
<--
***cc_WaitCall(
)
-->
ISDN_Unblock_Ts
-->
Incoming call
unblocked
* Optional for TE/Windows implementation.
** An implementation option for custom equipment, mandatory for network emulation side.
*** Required for both synchronous and asynchronous programming model.