diff --git a/custom_components/intratone/__init__.py b/custom_components/intratone/__init__.py
index d17baf7..0999ef4 100644
--- a/custom_components/intratone/__init__.py
+++ b/custom_components/intratone/__init__.py
@@ -93,6 +93,42 @@ def report_relay_status(
     }
 )
 
+# Answer call service and hang up service definition
+
+SERVICE_ANSWER_CALL = "answer_call"
+SERVICE_HANG_UP = "hang_up"
+
+ENTRY_TARGET_SCHEMA = vol.Schema({vol.Optional("entry_id"): cv.string})
+
+def _resolve_entries(hass: HomeAssistant, call: ServiceCall) -> list[IntratoneConfigEntry]:
+    entries = [
+        e
+        for e in hass.config_entries.async_entries(DOMAIN)
+        if e.state.recoverable and getattr(e, "runtime_data", None)
+    ]
+    target = call.data.get("entry_id")
+    if target:
+        entries = [e for e in entries if e.entry_id == target]
+    return entries
+
+
+async def _async_setup_call_services(hass: HomeAssistant) -> None:
+    async def _answer_call(call: ServiceCall) -> None:
+        for entry in _resolve_entries(hass, call):
+            coordinator = entry.runtime_data.coordinator
+            await coordinator.async_ensure_call_started()
+            await coordinator.async_wait_for_stream()
+
+    async def _hang_up(call: ServiceCall) -> None:
+        for entry in _resolve_entries(hass, call):
+            await entry.runtime_data.call_manager.hang_up()
+
+    hass.services.async_register(
+        DOMAIN, SERVICE_ANSWER_CALL, _answer_call, schema=ENTRY_TARGET_SCHEMA
+    )
+    hass.services.async_register(
+        DOMAIN, SERVICE_HANG_UP, _hang_up, schema=ENTRY_TARGET_SCHEMA
+    )
 
 @dataclass
 class IntratoneRuntime:
@@ -146,8 +182,11 @@ async def _simulate_ring(call: ServiceCall) -> None:
     hass.services.async_register(
         DOMAIN, SERVICE_SIMULATE_RING, _simulate_ring, schema=SIMULATE_RING_SCHEMA
     )
-    return True
 
+    # Register the answer_call and hang_up services
+    await _async_setup_call_services(hass)
+
+    return True
 
 async def async_setup_entry(hass: HomeAssistant, entry: IntratoneConfigEntry) -> bool:
     """Set up Intratone from a config entry."""