diff -urN asterisk-1.2.12.1.orig/channels/chan_sip.c asterisk-1.2.12.1/channels/chan_sip.c
--- asterisk-1.2.12.1.orig/channels/chan_sip.c	2006-09-09 05:14:03.000000000 -0700
+++ asterisk-1.2.12.1/channels/chan_sip.c	2006-09-24 07:56:46.000000000 -0700
@@ -7207,7 +7207,8 @@
 			p->amaflags = user->amaflags;
 			p->callgroup = user->callgroup;
 			p->pickupgroup = user->pickupgroup;
-			p->callingpres = user->callingpres;
+			if(user->callingpres) // taken from bug 7240
+				p->callingpres = user->callingpres;
 			p->capability = user->capability;
 			p->jointcapability = user->capability;
 			if (p->peercapability)
@@ -7270,7 +7271,8 @@
 			ast_copy_string(p->subscribecontext, peer->subscribecontext, sizeof(p->subscribecontext));
 			ast_copy_string(p->peermd5secret, peer->md5secret, sizeof(p->peermd5secret));
 			p->peermd5secret[sizeof(p->peermd5secret)-1] = '\0';
-			p->callingpres = peer->callingpres;
+			if(peer->callingpres) 		// taken from bug 7240
+				p->callingpres = peer->callingpres;
 			if (peer->maxms && peer->lastms)
 				p->timer_t1 = peer->lastms;
 			if (ast_test_flag(peer, SIP_INSECURE_INVITE)) {