Index: channels/chan_dahdi.c
===================================================================
--- channels/chan_dahdi.c	(revision 160386)
+++ channels/chan_dahdi.c	(working copy)
@@ -463,6 +463,7 @@
 #ifdef HAVE_PRI_INBANDDISCONNECT
 	unsigned int inbanddisconnect:1;				/*!< Should we support inband audio after receiving DISCONNECT? */
 #endif
+	unsigned int pmp_l1_check:1;					/*!< Whether we should ignore the l1 up/down events on a PMP BRI port. */
 	time_t lastreset;						/*!< time when unused channels were last reset */
 	long resetinterval;						/*!< Interval (in seconds) for resetting unused channels */
 	int sig;
@@ -827,6 +828,7 @@
 			.privateprefix = "",
 			.unknownprefix = "",
 			.resetinterval = -1,
+			.pmp_l1_check = -1,
 		},
 #endif
 #ifdef HAVE_SS7
@@ -8701,6 +8703,7 @@
 						pris[span].overlapdial = conf->pri.overlapdial;
 						pris[span].qsigchannelmapping = conf->pri.qsigchannelmapping;
 						pris[span].discardremoteholdretrieval = conf->pri.discardremoteholdretrieval;
+						pris[span].pmp_l1_check = (SIG_BRI_PTMP == chan_sig) ?  conf->pri.pmp_l1_check : 1;
 #ifdef HAVE_PRI_INBANDDISCONNECT
 						pris[span].inbanddisconnect = conf->pri.inbanddisconnect;
 #endif
@@ -10822,7 +10825,7 @@
 					ast_verb(2, "%s D-Channel on span %d up\n", pri_order(which), pri->span);
 				}
 				pri->dchanavail[which] |= DCHAN_UP;
-			} else {
+			} else if (pri->pmp_l1_check) {
 				if (pri->dchanavail[which] & DCHAN_UP) {
 					ast_verb(2, "%s D-Channel on span %d down\n", pri_order(which), pri->span);
 				}
@@ -14120,6 +14123,10 @@
 			} else {
 				mwisend_rpas = 0;
 			}
+#ifdef HAVE_PRI
+		} else if (!strcasecmp(v->name, "pmp_l1_check")) {
+			confp->pri.pmp_l1_check = ast_true(v->value);
+#endif
 		} else if (reload != 1) {
 			 if (!strcasecmp(v->name, "signalling") || !strcasecmp(v->name, "signaling")) {
 				int orig_radio = confp->chan.radio;