diff --git a/py25/bacpypes/app.py b/py25/bacpypes/app.py
index bd40f0e..1bcc338 100755
--- a/py25/bacpypes/app.py
+++ b/py25/bacpypes/app.py
@@ -248,7 +248,7 @@ class LocalDeviceObject(DeviceObject):
         { 'maxApduLengthAccepted': 1024
         , 'segmentationSupported': 'segmentedBoth'
         , 'maxSegmentsAccepted': 16
-        , 'apduSegmentTimeout': 20000
+        , 'apduSegmentTimeout': 5000
         , 'apduTimeout': 3000
         , 'numberOfApduRetries': 3
         }
diff --git a/py27/bacpypes/app.py b/py27/bacpypes/app.py
index 17b7c33..33e4a36 100755
--- a/py27/bacpypes/app.py
+++ b/py27/bacpypes/app.py
@@ -247,7 +247,7 @@ class LocalDeviceObject(DeviceObject):
         { 'maxApduLengthAccepted': 1024
         , 'segmentationSupported': 'segmentedBoth'
         , 'maxSegmentsAccepted': 16
-        , 'apduSegmentTimeout': 20000
+        , 'apduSegmentTimeout': 5000
         , 'apduTimeout': 3000
         , 'numberOfApduRetries': 3
         }
diff --git a/py34/bacpypes/app.py b/py34/bacpypes/app.py
index 17b7c33..33e4a36 100755
--- a/py34/bacpypes/app.py
+++ b/py34/bacpypes/app.py
@@ -247,7 +247,7 @@ class LocalDeviceObject(DeviceObject):
         { 'maxApduLengthAccepted': 1024
         , 'segmentationSupported': 'segmentedBoth'
         , 'maxSegmentsAccepted': 16
-        , 'apduSegmentTimeout': 20000
+        , 'apduSegmentTimeout': 5000
         , 'apduTimeout': 3000
         , 'numberOfApduRetries': 3
         }