diff --git a/src/call/call_audio.c b/src/call/call_audio.c
index 01c19e43..2efdf9b7 100644
--- a/src/call/call_audio.c
+++ b/src/call/call_audio.c
@@ -82,11 +82,11 @@ void call_audio_destroy(struct UTUN_INSTANCE* inst) {
 
 void call_audio_on_media(struct UTUN_INSTANCE* inst, uint64_t call_id,
                          uint16_t seq, uint32_t ts_ms, const uint8_t* opus, int len) {
-    (void)inst; (void)seq; (void)ts_ms;
+    (void)inst; (void)seq;
 
     pthread_mutex_lock(&g_mtx);
     if (g_active && call_id == g_call_id && g_vj && opus && len > 0) {
-        call_jitter_push(g_vj, opus, len);
+        call_jitter_push(g_vj, opus, len, ts_ms, (int64_t)(get_time_tb() / 10));
     }
     pthread_mutex_unlock(&g_mtx);
 }
diff --git a/src/call/call_jitter.cpp b/src/call/call_jitter.cpp
index 3b363bd6..e33e36ff 100644
--- a/src/call/call_jitter.cpp
+++ b/src/call/call_jitter.cpp
@@ -31,7 +31,7 @@ struct call_jitter {
     int head = 0, count = 0;
     uint32_t dropped = 0, underruns = 0;
     int processing_ms = 0, tempo_x100 = 100; /* снимок аудиопотока под mtx */
-    call_jitter_window window;
+    call_jitter_window depth_window, arrival_window;
     call_jitter_range range = {0, 0, 60}; /* опубликованный снимок под mtx */
     call_jitter_decode_fn decode;
     void* arg;
@@ -59,7 +59,7 @@ struct call_jitter* call_jitter_create(call_jitter_decode_fn decode, void* arg,
         return nullptr;
     }
     auto* j = new (memory) call_jitter;
-    j->window.max_reserve = max_reserve_ms;
+    j->arrival_window.max_reserve = max_reserve_ms;
     j->decode = decode; j->arg = arg;
     j->st.setSampleRate(kSampleRate); j->st.setChannels(1); j->st.setTempo(1.0);
     j->st.setSetting(SETTING_USE_QUICKSEEK, 1);
@@ -77,12 +77,23 @@ void call_jitter_destroy(struct call_jitter* j) {
     j->~call_jitter(); u_free(j);
 }
 
-void call_jitter_push(struct call_jitter* j, const uint8_t* enc, int len) {
-    if (!j || !enc || len <= 0 || len > kMaxEncoded) {
-        DEBUG_WARN(DEBUG_CATEGORY_CALL, "call_jitter: invalid frame len=%d", len);
+void call_jitter_push(struct call_jitter* j, const uint8_t* enc, int len, uint32_t sent_ms, int64_t received_ms) {
+    if (!j || !enc || len <= 0 || len > kMaxEncoded || received_ms < 0) {
+        DEBUG_WARN(DEBUG_CATEGORY_CALL, "call_jitter: invalid frame len=%d received=%lldms", len, (long long)received_ms);
         return;
     }
     std::lock_guard<std::mutex> lock(j->mtx);
+    if (received_ms < j->arrival_window.last_received_ms) {
+        DEBUG_WARN(DEBUG_CATEGORY_CALL, "call_jitter: receive clock moved backwards previous=%lldms now=%lldms",
+                   (long long)j->arrival_window.last_received_ms, (long long)received_ms);
+        return;
+    }
+    bool log_arrival = j->arrival_window.observe_arrival(received_ms, sent_ms);
+    j->range.reserve_ms = j->arrival_window.reserve;
+    if (log_arrival)
+        DEBUG_DEBUG(DEBUG_CATEGORY_CALL, "call_jitter: delivery variation=%lldms reserve=%dms queued=%dms",
+                    (long long)(j->arrival_window.high - j->arrival_window.low), j->arrival_window.reserve,
+                    j->count * CALL_JITTER_FRAME_MS);
     if (j->count == CALL_JITTER_MAX_FRAMES) {
         j->head = (j->head + 1) % CALL_JITTER_MAX_FRAMES; j->count--; j->dropped++;
         if (j->dropped == 1 || j->dropped % 50 == 0)
@@ -94,28 +105,28 @@ void call_jitter_push(struct call_jitter* j, const uint8_t* enc, int len) {
 
 int call_jitter_pull(struct call_jitter* j, int16_t* out, int max_samples) {
     if (!j || !out || max_samples <= 0) return 0;
-    int count;
-    { std::lock_guard<std::mutex> lock(j->mtx); count = j->count; }
+    int count, reserve;
+    { std::lock_guard<std::mutex> lock(j->mtx); count = j->count; reserve = j->arrival_window.reserve; }
     // Готовый PCM учитываем в длительности исходной речи.
     double depth = count * CALL_JITTER_FRAME_MS
         + (j->st.numUnprocessedSamples() + j->st.numSamples() * j->tempo) * 1000.0 / kSampleRate;
     int64_t now_ms = std::chrono::duration_cast<std::chrono::milliseconds>(
         std::chrono::steady_clock::now().time_since_epoch()).count();
-    bool log_stats = j->window.observe(now_ms, (int)std::lround(depth));
+    bool log_stats = j->depth_window.observe(now_ms, (int)std::lround(depth));
     {
         std::lock_guard<std::mutex> lock(j->mtx);
-        j->range = {j->window.low, j->window.high, j->window.reserve};
+        j->range.min_ms = (int)j->depth_window.low; j->range.max_ms = (int)j->depth_window.high;
     }
     if (log_stats)
-        DEBUG_DEBUG(DEBUG_CATEGORY_CALL, "call_jitter: depth=%.0fms min=%dms max=%dms reserve=%dms tempo=%.2f",
-                    depth, j->window.low, j->window.high, j->window.reserve, j->tempo);
+        DEBUG_DEBUG(DEBUG_CATEGORY_CALL, "call_jitter: depth=%.0fms min=%lldms max=%lldms reserve=%dms tempo=%.2f",
+                    depth, (long long)j->depth_window.low, (long long)j->depth_window.high, reserve, j->tempo);
     if (!j->primed) {
-        if (depth < j->window.reserve) return 0;
+        if (depth < reserve) return 0;
         j->primed = true;
-        DEBUG_INFO(DEBUG_CATEGORY_CALL, "call_jitter: playback resumed depth=%.0fms reserve=%dms", depth, j->window.reserve);
+        DEBUG_INFO(DEBUG_CATEGORY_CALL, "call_jitter: playback resumed depth=%.0fms reserve=%dms", depth, reserve);
     }
     j->ema_ms += 0.2 * (depth - j->ema_ms);
-    double target = 1.0 + (kMaxTempo - 1.0) * clamp_value((std::min(depth, j->ema_ms) - j->window.reserve - 15.0) / 925.0, 0.0, 1.0);
+    double target = 1.0 + (kMaxTempo - 1.0) * clamp_value((std::min(depth, j->ema_ms) - reserve - 15.0) / 925.0, 0.0, 1.0);
     // Линейный предел 1.0→1.6 за 500мс PCM. Снижение следует за глубиной буфера с тем же пределом.
     double step = (kMaxTempo - 1.0) * max_samples * 1000.0 / (kSampleRate * kTempoRampMs);
     j->tempo += clamp_value(target - j->tempo, -step, step);