ISDN Software Reference PRI Channel Initialization and Start Up

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.

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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.