diff --git a/AsbCloudApp/Services/ITelemetryService.cs b/AsbCloudApp/Services/ITelemetryService.cs
index 0975d0cf..c4e50b35 100644
--- a/AsbCloudApp/Services/ITelemetryService.cs
+++ b/AsbCloudApp/Services/ITelemetryService.cs
@@ -1,12 +1,12 @@
 using AsbCloudApp.Data;
 using AsbCloudApp.Data.SAUB;
 using System;
-using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace AsbCloudApp.Services
 {
+#nullable enable
     /// <summary>
     /// Сервис телеметрии
     /// </summary>
@@ -43,21 +43,12 @@ namespace AsbCloudApp.Services
         /// <returns></returns>
         SimpleTimezoneDto GetTimezone(int idTelemetry);
 
-        // TODO: вероятно лишнее
-        /// <summary>
-        /// Список передающих в данный момент телеметрий
-        /// </summary>
-        /// <returns></returns>
-        IEnumerable<TelemetryDto> GetTransmittingTelemetries();
-
-        // TODO: вероятно лишнее
         /// <summary>
         /// Получить дату получения последних данных
         /// </summary>
         /// <param name="idTelemetry"></param>
-        /// <param name="useUtc"></param>
         /// <returns></returns>
-        DateTime GetLastTelemetryDate(int idTelemetry, bool useUtc = false);
+        DateTime GetLastTelemetryDate(int idTelemetry);
 
         /// <summary>
         /// получить idTelemetry по IdWell
@@ -82,16 +73,6 @@ namespace AsbCloudApp.Services
         /// <returns></returns>
         Task UpdateInfoAsync(string uid, TelemetryInfoDto info, CancellationToken token);
 
-        // TODO: вероятно лишнее
-        /// <summary>
-        /// обновить данные о временной зоне (используется панелью)
-        /// </summary>
-        /// <param name="uid"></param>
-        /// <param name="telemetryTimeZoneInfo"></param>
-        /// <param name="token"></param>
-        /// <returns></returns>
-        Task UpdateTimezoneAsync(string uid, SimpleTimezoneDto telemetryTimeZoneInfo, CancellationToken token);
-
         /// <summary>
         /// Слить данные телеметрии в одну
         /// </summary>
@@ -100,13 +81,7 @@ namespace AsbCloudApp.Services
         /// <param name="token"></param>
         /// <returns></returns>
         Task<int> MergeAsync(int from, int to, CancellationToken token);
-
-        // TODO: вероятно лишнее
-        /// <summary>
-        /// сохранить данные о запросе
-        /// </summary>
-        /// <param name="uid"></param>
-        /// <param name="remoteDate"></param>
-        void SaveRequestDate(string uid, DateTimeOffset remoteDate);
     }
+
+#nullable disable
 }
\ No newline at end of file
diff --git a/AsbCloudInfrastructure/Services/SAUB/MessageService.cs b/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
index 11db53f7..541003e5 100644
--- a/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/MessageService.cs
@@ -141,10 +141,6 @@ namespace AsbCloudInfrastructure.Services.SAUB
             var telemetryId = telemetryService.GetOrCreateTelemetryIdByUid(uid);
             var timezone = telemetryService.GetTimezone(telemetryId);
 
-            var maxDateDto = dtos.Max(m => m.Date);
-            var maxDateUtc = maxDateDto.ToUtcDateTimeOffset(timezone.Hours);
-            telemetryService.SaveRequestDate(uid, maxDateDto);
-
             foreach (var dto in dtos)
             {
                 var entity = dto.Adapt<TelemetryMessage>();
diff --git a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
index 285ac3d8..a1881174 100644
--- a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataBaseService.cs
@@ -14,13 +14,11 @@ namespace AsbCloudInfrastructure.Services.SAUB
 {
     public abstract class TelemetryDataBaseService<TDto, TModel> : ITelemetryDataService<TDto>
         where TDto : AsbCloudApp.Data.ITelemetryData
-        where TModel : class, AsbCloudDb.Model.ITelemetryData
+        where TModel : class, ITelemetryData
     {
         protected readonly IAsbCloudDbContext db;
         private readonly ITelemetryService telemetryService;
-        protected readonly CacheTable<Telemetry> cacheTelemetry;
         protected readonly CacheTable<TelemetryUser> cacheTelemetryUsers;
-        protected readonly CacheTable<Well> cacheWells;
 
         public TelemetryDataBaseService(
             IAsbCloudDbContext db,
@@ -29,9 +27,7 @@ namespace AsbCloudInfrastructure.Services.SAUB
         {
             this.db = db;
             this.telemetryService = telemetryService;
-            cacheTelemetry = cacheDb.GetCachedTable<Telemetry>((AsbCloudDbContext)db);
             cacheTelemetryUsers = cacheDb.GetCachedTable<TelemetryUser>((AsbCloudDbContext)db);
-            cacheWells = cacheDb.GetCachedTable<Well>((AsbCloudDbContext)db);
         }
 
         public virtual async Task<int> UpdateDataAsync(string uid, IEnumerable<TDto> dtos, CancellationToken token = default)
@@ -65,7 +61,7 @@ namespace AsbCloudInfrastructure.Services.SAUB
             });
 
             var entityMaxDate = entities.Max(e => e.DateTime);
-            telemetryService.SaveRequestDate(uid, entityMaxDate);
+            telemetryService.TelemetryTracker.SaveRequestDate(uid, entityMaxDate);
 
             var dbset = db.Set<TModel>();
             var stopwatch = Stopwatch.StartNew();
@@ -91,11 +87,9 @@ namespace AsbCloudInfrastructure.Services.SAUB
             DateTime dateBegin = default, double intervalSec = 600d,
             int approxPointsCount = 1024, CancellationToken token = default)
         {
-            var well = cacheWells.FirstOrDefault(w => w.Id == idWell);
-            if (well?.IdTelemetry is null)
-                return default;
-
-            var idTelemetry = well?.IdTelemetry ?? default;
+            var idTelemetry = telemetryService.GetIdTelemetryByIdWell(idWell) ?? -1;
+            if (idTelemetry == -1)
+                return null;
 
             var timezone = telemetryService.GetTimezone(idTelemetry);
 
@@ -103,7 +97,8 @@ namespace AsbCloudInfrastructure.Services.SAUB
             DateTimeOffset dateBeginUtc;
             if (dateBegin == default)
             {
-                dateBeginUtc = telemetryService.GetLastTelemetryDate(idTelemetry, true);
+                dateBeginUtc = telemetryService.GetLastTelemetryDate(idTelemetry)
+                    .ToUtcDateTimeOffset(timezone.Hours);
                 if (dateBeginUtc != default)
                     dateBeginUtc = dateBeginUtc.AddSeconds(-intervalSec);
             }
@@ -153,24 +148,5 @@ namespace AsbCloudInfrastructure.Services.SAUB
 
         public abstract TModel Convert(TDto src, double timezoneOffset);
 
-        private static double AssumeTimezoneOffset(DateTime nearToCurrentDate)
-        {
-            var offset = 5d;
-            if (nearToCurrentDate.Kind == DateTimeKind.Unspecified)
-            {
-                var now = DateTime.UtcNow;
-                var minutes = 60 * (now.Hour - nearToCurrentDate.Hour) + now.Minute - nearToCurrentDate.Minute;
-                var minutesPositive = (1440_0000 + minutes) % 1440; //60*24
-                var halfsHours = Math.Round(1d * minutesPositive / 30d); // quarters are ignored
-                var hours = halfsHours / 2;
-                offset = hours < 12 ? hours : 24 - hours;
-            }
-            if (nearToCurrentDate.Kind == DateTimeKind.Local)
-                offset = TimeZoneInfo.Local.BaseUtcOffset.TotalHours;
-
-            return offset;
-        }
-
-        
     }
 }
diff --git a/AsbCloudInfrastructure/Services/SAUB/TelemetryService.cs b/AsbCloudInfrastructure/Services/SAUB/TelemetryService.cs
index d327a02c..21390596 100644
--- a/AsbCloudInfrastructure/Services/SAUB/TelemetryService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/TelemetryService.cs
@@ -3,7 +3,7 @@ using AsbCloudApp.Data.SAUB;
 using AsbCloudApp.Services;
 using AsbCloudDb;
 using AsbCloudDb.Model;
-using AsbCloudInfrastructure.Services.Cache;
+using AsbCloudInfrastructure.EfCache;
 using Mapster;
 using Microsoft.EntityFrameworkCore;
 using System;
@@ -14,10 +14,12 @@ using System.Threading.Tasks;
 
 namespace AsbCloudInfrastructure.Services.SAUB
 {
+#nullable enable
     public class TelemetryService : ITelemetryService
     {
-        private readonly CacheTable<Telemetry> cacheTelemetry;
-        private readonly CacheTable<Well> cacheWells;//TODO: use wellService instead of this
+        private const string telemetryCacheTag = "telemetryCache";
+        private static readonly TimeSpan telemetryCacheObsolescence = TimeSpan.FromMinutes(5);
+
         private readonly IAsbCloudDbContext db;
         private readonly ITelemetryTracker telemetryTracker;
         private readonly ITimezoneService timezoneService;
@@ -28,59 +30,42 @@ namespace AsbCloudInfrastructure.Services.SAUB
         public TelemetryService(
             IAsbCloudDbContext db,
             ITelemetryTracker telemetryTracker,
-            ITimezoneService timezoneService,
-            CacheDb cacheDb)
+            ITimezoneService timezoneService)
         {
-            cacheTelemetry = cacheDb.GetCachedTable<Telemetry>((AsbCloudDbContext)db);
-            cacheWells = cacheDb.GetCachedTable<Well>(
-                (AsbCloudDbContext)db,
-                $"{nameof(Well.Cluster)}.{nameof(Cluster.Deposit)}",
-                nameof(Well.Telemetry),
-                $"{nameof(Well.RelationCompaniesWells)}.{nameof(RelationCompanyWell.Company)}",
-                nameof(Well.WellType));
             this.db = db;
             this.telemetryTracker = telemetryTracker;
             this.timezoneService = timezoneService;
         }
 
-        public IEnumerable<TelemetryDto> GetTransmittingTelemetries()
+        private Dictionary<int, Telemetry> GetTelemetryCache()
         {
-            var telemetryDtos = new List<TelemetryDto>();
-            var activeTelemetriesUids = telemetryTracker.GetTransmittingTelemetriesUids();
-            if (!activeTelemetriesUids.Any())
-                return telemetryDtos;
-            var telemetries = cacheTelemetry
-                .Where(t => activeTelemetriesUids.Contains(t.RemoteUid));
-            telemetryDtos = telemetries.Adapt<IEnumerable<TelemetryDto>>().ToList();
-
-            return telemetryDtos;
+            var cache = db.Telemetries
+                .Include(t => t.Well)
+                .FromCacheDictionary(telemetryCacheTag, telemetryCacheObsolescence, t => t.Id);
+            return cache;
         }
 
-        public void SaveRequestDate(string uid, DateTimeOffset remoteDate) =>
-            telemetryTracker.SaveRequestDate(uid, remoteDate);
-
-        public DateTime GetLastTelemetryDate(int idTelemetry, bool useUtc = false)
+        private void DropTelemetryCache()
         {
-            var lastTelemetryDate = DateTimeOffset.MinValue;
-            var telemetry = cacheTelemetry.FirstOrDefault(t => t.Id == idTelemetry);
+            db.Telemetries.DropCacheDictionary(telemetryCacheTag);
+        }
+
+        public DateTime GetLastTelemetryDate(int idTelemetry)
+        {
+            var telemetry = GetTelemetryCache().GetValueOrDefault(idTelemetry);
 
             if (telemetry is null)
                 throw new Exception($"Telemetry id:{idTelemetry} does not exist");
 
             var uid = telemetry.RemoteUid;
             var timzone = GetTimezone(idTelemetry);
-
-            lastTelemetryDate = telemetryTracker.GetLastTelemetryDateByUid(uid);
-
-            if (useUtc)
-                return lastTelemetryDate.UtcDateTime;
-
+            var lastTelemetryDate = telemetryTracker.GetLastTelemetryDateByUid(uid);
             return lastTelemetryDate.ToRemoteDateTime(timzone.Hours);
         }
 
         public DatesRangeDto GetDatesRange(int idTelemetry)
         {
-            var telemetry = cacheTelemetry.FirstOrDefault(t => t.Id == idTelemetry);
+            var telemetry = GetTelemetryCache().GetValueOrDefault(idTelemetry);
             if (telemetry is null)
                 throw new Exception($"Telemetry id:{idTelemetry} does not exist");
 
@@ -115,13 +100,14 @@ namespace AsbCloudInfrastructure.Services.SAUB
                     TimezoneId = info.TimeZoneId
                 };
 
-            await cacheTelemetry.UpsertAsync(telemetry, token)
-                .ConfigureAwait(false);
+            db.Telemetries.Upsert(telemetry);
+            await db.SaveChangesAsync(token);
+            DropTelemetryCache();
         }
 
         public SimpleTimezoneDto GetTimezone(int idTelemetry)
         {
-            var telemetry = cacheTelemetry.FirstOrDefault(t => t.Id == idTelemetry);
+            var telemetry = GetTelemetryCache().GetValueOrDefault(idTelemetry);
 
             if (telemetry is null)
                 throw new Exception($"Telemetry id: {idTelemetry} does not exist.");
@@ -137,58 +123,65 @@ namespace AsbCloudInfrastructure.Services.SAUB
                     IsOverride = false,
                     TimezoneId = telemetry.Info.TimeZoneId,
                 };
-                cacheTelemetry.Upsert(telemetry);
+                db.Telemetries.Upsert(telemetry);
+                db.SaveChanges();
+                DropTelemetryCache();
                 return telemetry.TimeZone.Adapt<SimpleTimezoneDto>();
             }
 
             if (telemetry.Well?.Timezone is not null)
             {
                 telemetry.TimeZone = telemetry.Well.Timezone;
-                cacheTelemetry.Upsert(telemetry);
+                db.Telemetries.Upsert(telemetry);
+                db.SaveChanges();
+                DropTelemetryCache();
                 return telemetry.TimeZone.Adapt<SimpleTimezoneDto>();
             }
 
             throw new Exception($"Telemetry id: {idTelemetry} can't find timezone.");
         }
 
-        public async Task UpdateTimezoneAsync(string uid, SimpleTimezoneDto timeone,
-            CancellationToken token)
-        {
-            var telemetry = GetOrCreateTelemetryByUid(uid);
-            var newTelemetryTimeZone = timeone.Adapt<SimpleTimezone>();
-            if (newTelemetryTimeZone?.Equals(telemetry.TimeZone) == true)
-                return;
-            await cacheTelemetry.UpsertAsync(telemetry, token)
-                .ConfigureAwait(false);
-        }
-
         public int? GetIdTelemetryByIdWell(int idWell)
         {
-            var well = cacheWells.FirstOrDefault(w => w.Id == idWell);
-            return well?.IdTelemetry;
+            var telemetry = GetTelemetryCache()
+                .FirstOrDefault(t => t.Value.Well?.Id == idWell).Value;
+            return telemetry?.Id;
         }
 
-        private Well GetWellByTelemetryUid(string uid)
+        private Well? GetWellByTelemetryUid(string uid)
         {
-            var tele = cacheTelemetry.FirstOrDefault(t => t.RemoteUid == uid);
-            if (tele is null)
-                return null;
+            var telemetry = GetOrDefaultTelemetryByUid(uid);
+            return telemetry?.Well;
+        }
 
-            var well = cacheWells.FirstOrDefault(w => w?.IdTelemetry == tele.Id);
-            return well;
+        private Telemetry? GetOrDefaultTelemetryByUid(string uid)
+        {
+            var telemetry = GetTelemetryCache().FirstOrDefault(kv => kv.Value.RemoteUid == uid).Value;
+            return telemetry;
         }
 
         private Telemetry GetOrCreateTelemetryByUid(string uid)
-            => cacheTelemetry.GetOrCreate(t => t.RemoteUid == uid, () => new Telemetry
+        {
+            var telemetry = GetOrDefaultTelemetryByUid(uid);
+            if (telemetry is null)
             {
-                RemoteUid = uid,
-                TimeZone = new SimpleTimezone
+                var newTelemetry = new Telemetry
                 {
-                    Hours = 5,
-                    IsOverride = false,
-                    TimezoneId = "default",
-                }
-            });
+                    RemoteUid = uid,
+                    TimeZone = new SimpleTimezone
+                    {
+                        Hours = 5,
+                        IsOverride = false,
+                        TimezoneId = "default",
+                    }
+                };
+                var entry = db.Telemetries.Add(newTelemetry);
+                db.SaveChanges();
+                DropTelemetryCache();
+                return entry.Entity;
+            }            
+            return telemetry;
+        }
 
         public async Task<int> MergeAsync(int from, int to, CancellationToken token)
         {
@@ -229,12 +222,15 @@ namespace AsbCloudInfrastructure.Services.SAUB
 
                 stopwath.Stop();
                 Console.WriteLine($"Successfully committed in {1d * stopwath.ElapsedMilliseconds / 1000d: #0.00} sec. Affected {affected} rows.");
+                DropTelemetryCache();
                 return affected;
             }
             catch (Exception ex)
             {
                 System.Diagnostics.Trace.WriteLine($"Merge() Fail. Rollback. Reason is:{ex.Message}");
-                await transaction.RollbackAsync(token).ConfigureAwait(false);
+#pragma warning disable CA2016 // Перенаправьте параметр "CancellationToken" в методы
+                await transaction.RollbackAsync();
+#pragma warning restore CA2016 // Перенаправьте параметр "CancellationToken" в методы
                 return -1;
             }
         }
@@ -352,4 +348,5 @@ namespace AsbCloudInfrastructure.Services.SAUB
             return affected;
         }
     }
+#nullable disable
 }
diff --git a/AsbCloudWebApi/Controllers/SAUB/TelemetryController.cs b/AsbCloudWebApi/Controllers/SAUB/TelemetryController.cs
index 33750bdd..4a77088a 100644
--- a/AsbCloudWebApi/Controllers/SAUB/TelemetryController.cs
+++ b/AsbCloudWebApi/Controllers/SAUB/TelemetryController.cs
@@ -54,23 +54,6 @@ namespace AsbCloudWebApi.Controllers.SAUB
             return Ok();
         }
 
-        /// <summary>
-        /// Обновляет часовой пояс скважины
-        /// </summary>
-        /// <param name="uid">Уникальный идентификатор отправителя</param>
-        /// <param name="timezone">Информация о часовом поясе</param>
-        /// <param name="token">Токен отмены задачи</param>
-        /// <returns></returns>
-        [HttpPost]
-        [Route("{uid}/timezone")]
-        public async Task<IActionResult> UpdateTimeZoneAsync(string uid, SimpleTimezoneDto timezone,
-            CancellationToken token)
-        {
-            await telemetryService.UpdateTimezoneAsync(uid, timezone, token)
-                .ConfigureAwait(false);
-            return Ok();
-        }
-
         /// <summary>
         /// Принимает список новых сообщений от телеметрии
         /// </summary>