diff --git a/py34/bacpypes/service/cov.py b/py34/bacpypes/service/cov.py
index a506bf24..160223b9 100644
--- a/py34/bacpypes/service/cov.py
+++ b/py34/bacpypes/service/cov.py
@@ -90,8 +90,8 @@ class Subscription(OneShotTask, DebugContents):
         'lifetime',
         )
 
-    def __init__(self, obj_ref, client_addr, proc_id, obj_id, confirmed, lifetime=0):
-        if _debug: Subscription._debug("__init__ %r %r %r %r %r %r", obj_ref, client_addr, proc_id, obj_id, confirmed, lifetime)
+    def __init__(self, obj_ref, client_addr, proc_id, obj_id, confirmed, lifetime, cov_inc):
+        if _debug: Subscription._debug("__init__ %r %r %r %r %r %r %r", obj_ref, client_addr, proc_id, obj_id, confirmed, lifetime, cov_inc)
         OneShotTask.__init__(self)
 
         # save the reference to the related object
@@ -102,10 +102,12 @@ def __init__(self, obj_ref, client_addr, proc_id, obj_id, confirmed, lifetime=0)
         self.proc_id = proc_id
         self.obj_id = obj_id
         self.confirmed = confirmed
+        self.lifetime = lifetime
+        self.covIncrement = cov_inc
 
-        # if lifetime is none, consider permanent subscription (0)        
-        self.lifetime = 0 if lifetime is None else lifetime
-        self.install_task(delta=self.lifetime)
+        # if lifetime is zero this is a permanent subscription
+        if lifetime > 0:
+            self.install_task(delta=self.lifetime)
 
     def cancel_subscription(self):
         if _debug: Subscription._debug("cancel_subscription")
@@ -678,8 +680,8 @@ def cov_abort(self, cov, request, response):
 
         ### delete the rest of the pending requests for this client
 
-    def do_SubscribeCOVRequest(self, apdu):
-        if _debug: ChangeOfValueServices._debug("do_SubscribeCOVRequest %r", apdu)
+    def do_SubscribeCOVPropertyRequest(self, apdu):
+        if _debug: ChangeOfValueServices._debug("do_SubscribeCOVPropertyRequest %r", apdu)
 
         # extract the pieces
         client_addr = apdu.pduSource
@@ -687,6 +689,8 @@ def do_SubscribeCOVRequest(self, apdu):
         obj_id = apdu.monitoredObjectIdentifier
         confirmed = apdu.issueConfirmedNotifications
         lifetime = apdu.lifetime
+        prop_id = apdu.monitoredPropertyIdentifier
+        cov_inc = apdu.covIncrement
 
         # request is to cancel the subscription
         cancel_subscription = (confirmed is None) and (lifetime is None)
@@ -737,7 +741,8 @@ def do_SubscribeCOVRequest(self, apdu):
                 if _debug: ChangeOfValueServices._debug("    - create a subscription")
 
                 # make a subscription
-                cov = Subscription(obj, client_addr, proc_id, obj_id, confirmed, lifetime)
+                cov = Subscription(obj, client_addr, proc_id, obj_id,
+                                   confirmed, lifetime, cov_inc)
                 if _debug: ChangeOfValueServices._debug("    - cov: %r", cov)
 
                 # add it to our subscriptions lists
@@ -754,4 +759,3 @@ def do_SubscribeCOVRequest(self, apdu):
         if not cancel_subscription:
             if _debug: ChangeOfValueServices._debug("    - send a notification")
             deferred(cov_detection.send_cov_notifications, cov)
-
diff --git a/samples/COVClient.py b/samples/COVClient.py
index 41673e79..012c8e52 100755
--- a/samples/COVClient.py
+++ b/samples/COVClient.py
@@ -15,11 +15,12 @@
 from bacpypes.iocb import IOCB
 
 from bacpypes.pdu import Address
-from bacpypes.apdu import SubscribeCOVRequest, SimpleAckPDU, RejectPDU, AbortPDU
+from bacpypes.apdu import SubscribeCOVRequest, SimpleAckPDU, RejectPDU, AbortPDU, SubscribeCOVPropertyRequest
 from bacpypes.primitivedata import ObjectIdentifier
 
 from bacpypes.app import BIPSimpleApplication
 from bacpypes.local.device import LocalDeviceObject
+from bacpypes.basetypes import PropertyReference
 
 # some debugging
 _debug = 0
@@ -145,8 +146,14 @@ def do_subscribe(self, args):
                 lifetime = None
 
             # build a request
-            request = SubscribeCOVRequest(
-                subscriberProcessIdentifier=proc_id, monitoredObjectIdentifier=obj_id
+            # request = SubscribeCOVRequest(
+            #     subscriberProcessIdentifier=proc_id, monitoredObjectIdentifier=obj_id
+            # )
+            request = SubscribeCOVPropertyRequest(
+                subscriberProcessIdentifier=proc_id,
+                monitoredObjectIdentifier=obj_id,
+                monitoredPropertyIdentifier=PropertyReference(propertyIdentifier=85),
+                covIncrement=2
             )
             request.pduDestination = Address(addr)
 
diff --git a/samples/WhoIsRouterForeign.py b/samples/WhoIsRouterForeign.py
index 8e97d6c1..8cac728c 100755
--- a/samples/WhoIsRouterForeign.py
+++ b/samples/WhoIsRouterForeign.py
@@ -120,8 +120,8 @@ def main():
     # make a simple application
     this_application = WhoIsRouterApplication(
         args.ini.address,
-        bbmdAddress=Address(args.ini.foreignbbmd),
-        bbmdTTL=int(args.ini.foreignttl),
+        bbmdAddress=Address(args.ini.foreignbbmd), 
+        bbmdTTL=int(args.ini.foreignttl)
         )
     if _debug: _log.debug("    - this_application: %r", this_application)