diff --git a/ge1mer/domofon.yaml b/ge1mer/domofon.yaml
index b4732cb..98f28cc 100644
--- a/ge1mer/domofon.yaml
+++ b/ge1mer/domofon.yaml
@@ -29,6 +29,7 @@ substitutions:
   api_password: "esphome"
 
   # Software configuration
+  call_start_detect_delay: 50ms     # Wait a while before going into a ring state
   call_end_detect_delay: 4000ms     # Interval between rings to detect incoming call
   short_click_time_from: 50ms       # Short button click min time
   short_click_time_to: 1000ms       # Long button click min time
diff --git a/ge1mer/esphome/packages/binary_sensor.yaml b/ge1mer/esphome/packages/binary_sensor.yaml
index b79f09c..ebad437 100644
--- a/ge1mer/esphome/packages/binary_sensor.yaml
+++ b/ge1mer/esphome/packages/binary_sensor.yaml
@@ -9,6 +9,7 @@ binary_sensor:
       mode: INPUT_PULLUP
       inverted: True
     filters:
+      delayed_on: $call_start_detect_delay
       delayed_off: $call_end_detect_delay
     on_press:
       then: