di seguito i risultati del diff dei seguenti file:

• diff -cB channels/chan_sip.c.orig channels/chan_sip.c > /root/chan_sip.c.diff
• diff -cB main/channel.c.orig main/channel.c > /root/channel.c
• diff -cB include/asterisk/channel.h.orig include/asterisk/channel.h > /root/channel.h

chan_sip.c.diff

*** chan_sip.c.orig	2010-02-04 15:42:02.000000000 +0100
--- chan_sip.c	2010-02-04 15:43:52.000000000 +0100
***************
*** 14127,14134 ****
  
  	/* Make sure that the masq does not free our PVT for the old call */
  	if (! earlyreplace && ! oneleggedreplace )
! 		ast_set_flag(&p->refer->refer_call->flags[0], SIP_DEFER_BYE_ON_TRANSFER);	/* Delay hangup */
! 		
  	/* Prepare the masquerade - if this does not happen, we will be gone */
  	if(ast_channel_masquerade(replacecall, c))
  		ast_log(LOG_ERROR, "Failed to masquerade C into Replacecall\n");
--- 14127,14134 ----
  
  	/* Make sure that the masq does not free our PVT for the old call */
  	if (! earlyreplace && ! oneleggedreplace )
! 		/* ast_set_flag(&p->refer->refer_call->flags[0], SIP_DEFER_BYE_ON_TRANSFER);*/
! 		ast_set_flag(&p->refer->refer_call->flags[0], AST_FLAG_KEEP_PVT_AT_HANGUP);
  	/* Prepare the masquerade - if this does not happen, we will be gone */
  	if(ast_channel_masquerade(replacecall, c))
  		ast_log(LOG_ERROR, "Failed to masquerade C into Replacecall\n");

channel.c

*** channel.c.orig	2010-02-04 15:39:11.000000000 +0100
--- channel.c	2010-02-04 15:41:43.000000000 +0100
***************
*** 1270,1277 ****
  	ast_channel_unlock(chan);
  
  	if (chan->tech_pvt) {
! 		ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name);
! 		free(chan->tech_pvt);
  	}
  
  	if (chan->sched)
--- 1270,1283 ----
  	ast_channel_unlock(chan);
  
  	if (chan->tech_pvt) {
! 		/* ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name);
! 		free(chan->tech_pvt); */
! 		if (ast_test_flag(chan, AST_FLAG_KEEP_PVT_AT_HANGUP)) {
!          		ast_log(LOG_DEBUG, "Channel '%s' pvt stays around, even though the channel is freed.\n", chan->name);
!       		} else {
! 			ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name);
! 			free(chan->tech_pvt);
! 		}
  	}
  
  	if (chan->sched)

channel.h

*** channel.h.orig	2010-02-04 15:35:29.000000000 +0100
--- channel.h	2010-02-04 15:37:41.000000000 +0100
***************
*** 496,501 ****
--- 496,503 ----
  	AST_FLAG_OUTGOING =      (1 << 10),
  	/*! This channel is being whispered on */
  	AST_FLAG_WHISPER =       (1 << 11),
+ 	/*! Do NOT destroy PVT even if it's around after hangup! */
+ 	AST_FLAG_KEEP_PVT_AT_HANGUP = (1 << 12),
  	/*! A DTMF_BEGIN frame has been read from this channel, but not yet an END */
  	AST_FLAG_IN_DTMF =       (1 << 12),
  	/*! A DTMF_END was received when not IN_DTMF, so the length of the digit is 

Nel file libpri/pri_facility.h

cambiare il valore di ROSE_DIVERTING_LEG_INFORMATION2 da 0x15 a 0x0f

Q.SIG (USA) usa il valore HEX 0x15 per la funzione, mentre euroisdn (almeno il nostro) HEX 0x0f (15 DEC)