diff --git a/TESTS/netsocket/tcp/main.cpp b/TESTS/netsocket/tcp/main.cpp
index 2eaa4d0cd7..45157b87d9 100644
--- a/TESTS/netsocket/tcp/main.cpp
+++ b/TESTS/netsocket/tcp/main.cpp
@@ -34,6 +34,9 @@ namespace
     NetworkInterface* net;
 }
 
+char tcp_global::rx_buffer[RX_BUFF_SIZE];
+char tcp_global::tx_buffer[TX_BUFF_SIZE];
+
 NetworkInterface* get_interface()
 {
     return net;
diff --git a/TESTS/netsocket/tcp/tcp_tests.h b/TESTS/netsocket/tcp/tcp_tests.h
index f392ef7446..50e815d70b 100644
--- a/TESTS/netsocket/tcp/tcp_tests.h
+++ b/TESTS/netsocket/tcp/tcp_tests.h
@@ -24,6 +24,17 @@ void fill_tx_buffer_ascii(char *buff, size_t len);
 void tcpsocket_connect_to_echo_srv(TCPSocket& sock);
 void tcpsocket_connect_to_discard_srv(TCPSocket& sock);
 
+namespace tcp_global
+{
+static const int TCP_OS_STACK_SIZE = 1024;
+
+static const int RX_BUFF_SIZE = 1220;
+static const int TX_BUFF_SIZE = 1220;
+
+extern char rx_buffer[RX_BUFF_SIZE];
+extern char tx_buffer[TX_BUFF_SIZE];
+}
+
 /*
  * Test cases
  */
diff --git a/TESTS/netsocket/tcp/tcpsocket_echotest.cpp b/TESTS/netsocket/tcp/tcpsocket_echotest.cpp
index bcd83035f7..013fd7172b 100644
--- a/TESTS/netsocket/tcp/tcpsocket_echotest.cpp
+++ b/TESTS/netsocket/tcp/tcpsocket_echotest.cpp
@@ -31,9 +31,6 @@ namespace
     static const int SIGIO_TIMEOUT = 5000; //[ms]
 
     static const int BUFF_SIZE = 1200;
-    char rx_buffer[BUFF_SIZE] = {0};
-    char tx_buffer[BUFF_SIZE] = {0};
-
     static const int PKTS = 22;
     static const int pkt_sizes[PKTS] = {1,2,3,4,5,6,7,8,9,10, \
                                         100,200,300,400,500,600,700,800,900,1000,\
@@ -54,9 +51,9 @@ void TCPSOCKET_ECHOTEST()
     int sent;
     int x = 0;
     for (int pkt_s = pkt_sizes[x]; x < PKTS; pkt_s = pkt_sizes[x++]) {
-        fill_tx_buffer_ascii(tx_buffer, BUFF_SIZE);
+        fill_tx_buffer_ascii(tcp_global::tx_buffer, BUFF_SIZE);
 
-        sent = sock.send(tx_buffer, pkt_s);
+        sent = sock.send(tcp_global::tx_buffer, pkt_s);
         if (sent < 0) {
             printf("[Round#%02d] network error %d\n", x, sent);
             TEST_FAIL();
@@ -64,14 +61,14 @@ void TCPSOCKET_ECHOTEST()
 
         int bytes2recv = sent;
         while (bytes2recv) {
-            recvd = sock.recv(&(rx_buffer[sent-bytes2recv]), bytes2recv);
+            recvd = sock.recv(&(tcp_global::rx_buffer[sent-bytes2recv]), bytes2recv);
                 if (recvd < 0) {
                 printf("[Round#%02d] network error %d\n", x, recvd);
                 TEST_FAIL();
             }
             bytes2recv -= recvd;
         }
-        TEST_ASSERT_EQUAL(0, memcmp(tx_buffer, rx_buffer, sent));
+        TEST_ASSERT_EQUAL(0, memcmp(tcp_global::tx_buffer, tcp_global::rx_buffer, sent));
     }
     TEST_ASSERT_EQUAL(NSAPI_ERROR_OK, sock.close());
 }
@@ -81,7 +78,7 @@ void tcpsocket_echotest_nonblock_receiver(void *receive_bytes)
     int bytes2recv = *(int*)receive_bytes;
     int recvd;
     while (bytes2recv) {
-        recvd = sock.recv(&(rx_buffer[*(int*)receive_bytes-bytes2recv]), bytes2recv);
+        recvd = sock.recv(&(tcp_global::rx_buffer[*(int*)receive_bytes-bytes2recv]), bytes2recv);
         if (recvd == NSAPI_ERROR_WOULD_BLOCK) {
             wait(1);
             continue;
@@ -91,7 +88,7 @@ void tcpsocket_echotest_nonblock_receiver(void *receive_bytes)
         bytes2recv -= recvd;
     }
 
-    TEST_ASSERT_EQUAL(0, memcmp(tx_buffer, rx_buffer, *(int*)receive_bytes));
+    TEST_ASSERT_EQUAL(0, memcmp(tcp_global::tx_buffer, tcp_global::rx_buffer, *(int*)receive_bytes));
 
     static int round = 0;
     printf("[Recevr#%02d] bytes received: %d\n", round++, *(int*)receive_bytes);
@@ -110,22 +107,22 @@ void TCPSOCKET_ECHOTEST_NONBLOCK()
     int sent;
     int s_idx = 0;
     Thread *thread;
-    unsigned char *stack_mem = (unsigned char *)malloc(OS_STACK_SIZE);
+    unsigned char *stack_mem = (unsigned char *)malloc(tcp_global::TCP_OS_STACK_SIZE);
     TEST_ASSERT_NOT_NULL(stack_mem);
 
     for (int pkt_s = pkt_sizes[s_idx]; s_idx < PKTS; ++s_idx) {
         pkt_s = pkt_sizes[s_idx];
         thread = new Thread(osPriorityNormal,
-                            OS_STACK_SIZE,
+                            tcp_global::TCP_OS_STACK_SIZE,
                             stack_mem,
                             "receiver");
         TEST_ASSERT_EQUAL(osOK, thread->start(callback(tcpsocket_echotest_nonblock_receiver, &pkt_s)));
 
-        fill_tx_buffer_ascii(tx_buffer, pkt_s);
+        fill_tx_buffer_ascii(tcp_global::tx_buffer, pkt_s);
 
         bytes2send = pkt_s;
         while (bytes2send > 0) {
-            sent = sock.send(&(tx_buffer[pkt_s-bytes2send]), bytes2send);
+            sent = sock.send(&(tcp_global::tx_buffer[pkt_s-bytes2send]), bytes2send);
             if (sent == NSAPI_ERROR_WOULD_BLOCK) {
                 TEST_ASSERT_NOT_EQUAL(osEventTimeout, osSignalWait(SIGNAL_SIGIO, SIGIO_TIMEOUT).status);
                 continue;
diff --git a/TESTS/netsocket/tcp/tcpsocket_echotest_burst.cpp b/TESTS/netsocket/tcp/tcpsocket_echotest_burst.cpp
index adc3cdd0e8..12b8fdf403 100644
--- a/TESTS/netsocket/tcp/tcpsocket_echotest_burst.cpp
+++ b/TESTS/netsocket/tcp/tcpsocket_echotest_burst.cpp
@@ -32,8 +32,6 @@ namespace
 
     static const int BURST_CNT = 100;
     static const int BURST_SIZE = 1220;
-    char rx_buffer[BURST_SIZE] = {0};
-    char tx_buffer[BURST_SIZE] = {0};
 }
 
 static void _sigio_handler(osThreadId id) {
@@ -47,7 +45,7 @@ void TCPSOCKET_ECHOTEST_BURST()
     sock.sigio(callback(_sigio_handler, Thread::gettid()));
 
     // TX buffer to be preserved for comparison
-    fill_tx_buffer_ascii(tx_buffer, BURST_SIZE);
+    fill_tx_buffer_ascii(tcp_global::tx_buffer, BURST_SIZE);
 
     int recvd;
     int bt_left;
@@ -55,7 +53,7 @@ void TCPSOCKET_ECHOTEST_BURST()
     for (int i = 0; i < BURST_CNT; i++) {
         bt_left = BURST_SIZE;
         while (bt_left > 0) {
-            sent = sock.send(&(tx_buffer[BURST_SIZE-bt_left]), bt_left);
+            sent = sock.send(&(tcp_global::tx_buffer[BURST_SIZE-bt_left]), bt_left);
             if (sent == NSAPI_ERROR_WOULD_BLOCK) {
                 if(osSignalWait(SIGNAL_SIGIO, SIGIO_TIMEOUT).status == osEventTimeout) {
                     TEST_FAIL();
@@ -70,7 +68,7 @@ void TCPSOCKET_ECHOTEST_BURST()
 
         bt_left = BURST_SIZE;
         while (bt_left > 0) {
-            recvd = sock.recv(&(rx_buffer[BURST_SIZE-bt_left]), BURST_SIZE);
+            recvd = sock.recv(&(tcp_global::rx_buffer[BURST_SIZE-bt_left]), BURST_SIZE);
             if (recvd < 0) {
                 printf("[%02d] network error %d\n", i, recvd);
                 break;
@@ -83,7 +81,7 @@ void TCPSOCKET_ECHOTEST_BURST()
             TEST_FAIL();
         }
 
-        TEST_ASSERT_EQUAL(0, memcmp(tx_buffer, rx_buffer, BURST_SIZE));
+        TEST_ASSERT_EQUAL(0, memcmp(tcp_global::tx_buffer, tcp_global::rx_buffer, BURST_SIZE));
     }
     TEST_ASSERT_EQUAL(NSAPI_ERROR_OK, sock.close());
 }
@@ -96,7 +94,7 @@ void TCPSOCKET_ECHOTEST_BURST_NONBLOCK()
     sock.sigio(callback(_sigio_handler, Thread::gettid()));
 
     // TX buffer to be preserved for comparison
-    fill_tx_buffer_ascii(tx_buffer, BURST_SIZE);
+    fill_tx_buffer_ascii(tcp_global::tx_buffer, BURST_SIZE);
 
     int sent;
     int recvd;
@@ -104,7 +102,7 @@ void TCPSOCKET_ECHOTEST_BURST_NONBLOCK()
     for (int i = 0; i < BURST_CNT; i++) {
         bt_left = BURST_SIZE;
         while (bt_left > 0) {
-            sent = sock.send(&(tx_buffer[BURST_SIZE-bt_left]), bt_left);
+            sent = sock.send(&(tcp_global::tx_buffer[BURST_SIZE-bt_left]), bt_left);
             if (sent == NSAPI_ERROR_WOULD_BLOCK) {
                 if(osSignalWait(SIGNAL_SIGIO, SIGIO_TIMEOUT).status == osEventTimeout) {
                     TEST_FAIL();
@@ -120,7 +118,7 @@ void TCPSOCKET_ECHOTEST_BURST_NONBLOCK()
 
         bt_left = BURST_SIZE;
         while (bt_left > 0) {
-            recvd = sock.recv(&(rx_buffer[BURST_SIZE-bt_left]), BURST_SIZE);
+            recvd = sock.recv(&(tcp_global::rx_buffer[BURST_SIZE-bt_left]), BURST_SIZE);
             if (recvd == NSAPI_ERROR_WOULD_BLOCK) {
                 if(osSignalWait(SIGNAL_SIGIO, SIGIO_TIMEOUT).status == osEventTimeout) {
                     printf("[bt#%02d] packet timeout...", i);
@@ -140,7 +138,7 @@ void TCPSOCKET_ECHOTEST_BURST_NONBLOCK()
             TEST_FAIL();
         }
 
-        TEST_ASSERT_EQUAL(0, memcmp(tx_buffer, rx_buffer, BURST_SIZE));
+        TEST_ASSERT_EQUAL(0, memcmp(tcp_global::tx_buffer, tcp_global::rx_buffer, BURST_SIZE));
     }
     TEST_ASSERT_EQUAL(NSAPI_ERROR_OK, sock.close());
 }
diff --git a/TESTS/network/emac/emac_TestMemoryManager.cpp b/TESTS/network/emac/emac_TestMemoryManager.cpp
index 6a47454034..05a0a62663 100644
--- a/TESTS/network/emac/emac_TestMemoryManager.cpp
+++ b/TESTS/network/emac/emac_TestMemoryManager.cpp
@@ -27,6 +27,11 @@
 
 #include "rtos/Mutex.h"
 
+extern "C" {
+#include "arm_hal_interrupt_private.h"
+}
+#include "nsdynmemLIB.h"
+
 #include "EMACMemoryManager.h"
 #include "emac_TestMemoryManager.h"
 
@@ -43,12 +48,57 @@
 
 char s_trace_buffer[100] = MEM_MNGR_TRACE;
 
+/* For LPC boards define the heap memory bank ourselves to give us section placement
+   control */
+#ifndef ETHMEM_SECTION
+#if defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
+#  if defined (__ICCARM__)
+#     define ETHMEM_SECTION
+#  elif defined(TOOLCHAIN_GCC_CR)
+#     define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
+#  else
+#     define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
+#  endif
+#elif defined(TARGET_LPC1768) || defined(TARGET_LPC1769)
+#  if defined (__ICCARM__)
+#     define ETHMEM_SECTION
+#  elif defined(TOOLCHAIN_GCC_CR)
+#     define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
+#  else
+#     define ETHMEM_SECTION __attribute__((section("AHBSRAM0"),aligned))
+#  endif
+#endif
+#endif
+
+#ifdef ETHMEM_SECTION
+// Use nanostack libservice dynamic memory library
+#define EMAC_HEAP_SIZE 16300
+
+#if defined (__ICCARM__)
+#pragma location = ".ethusbram"
+#endif
+ETHMEM_SECTION static unsigned char ns_heap[EMAC_HEAP_SIZE];
+
+void emac_heap_error_handler(heap_fail_t event)
+{
+    MBED_ASSERT(0);
+}
+#endif
+
 EmacTestMemoryManager::EmacTestMemoryManager()
     : m_mem_mutex(),
       m_mem_buffers(),
       m_alloc_unit(BUF_POOL_SIZE),
       m_memory_available(true)
 {
+#ifdef ETHMEM_SECTION
+    static bool ns_heap_init = false;
+    if (!ns_heap_init) {
+        platform_critical_init(); // Create mutex for dynamic memory library
+        ns_dyn_mem_init(ns_heap, EMAC_HEAP_SIZE, emac_heap_error_handler, NULL);
+        ns_heap_init = true;
+    }
+#endif
 }
 
 emac_mem_buf_t *EmacTestMemoryManager::alloc_heap(uint32_t size, uint32_t align)
@@ -74,7 +124,11 @@ emac_mem_buf_t *EmacTestMemoryManager::alloc_heap(uint32_t size, uint32_t align,
 
     CHECK_ASSERT(buf, "alloc_heap() no memory");
 
+#ifdef ETHMEM_SECTION
+    buf->buffer = ns_dyn_mem_alloc(BUF_HEAD_SIZE + size + align + BUF_TAIL_SIZE);
+#else
     buf->buffer = std::malloc(BUF_HEAD_SIZE + size + align + BUF_TAIL_SIZE);
+#endif
 
     CHECK_ASSERT(buf->buffer, "alloc_heap() no memory");
 
@@ -218,7 +272,12 @@ void EmacTestMemoryManager::free(emac_mem_buf_t *buf)
         emac_memory_t *next = mem_buf->next;
 
         m_mem_buffers.erase(mem_buf_entry);
+
+#ifdef ETHMEM_SECTION
+        ns_dyn_mem_free(mem_buf->buffer);
+#else
         std::free(mem_buf->buffer);
+#endif
         delete mem_buf;
 
         mem_buf = next;
diff --git a/TESTS/network/emac/emac_TestNetworkStack.cpp b/TESTS/network/emac/emac_TestNetworkStack.cpp
index 9209f79492..cb5a2d2a2c 100644
--- a/TESTS/network/emac/emac_TestNetworkStack.cpp
+++ b/TESTS/network/emac/emac_TestNetworkStack.cpp
@@ -39,6 +39,18 @@ nsapi_error_t EmacTestNetworkStack::add_dns_server(const SocketAddress &address)
     return NSAPI_ERROR_OK;
 }
 
+nsapi_error_t EmacTestNetworkStack::call_in(int delay, mbed::Callback<void()> func)
+{
+    // Implemented as empty to save memory
+    return NSAPI_ERROR_DEVICE_ERROR;
+}
+
+EmacTestNetworkStack::call_in_callback_cb_t EmacTestNetworkStack::get_call_in_callback()
+{
+    call_in_callback_cb_t cb(this, &EmacTestNetworkStack::call_in);
+    return cb;
+}
+
 nsapi_error_t EmacTestNetworkStack::socket_open(nsapi_socket_t *handle, nsapi_protocol_t proto)
 {
     return NSAPI_ERROR_OK;
diff --git a/TESTS/network/emac/emac_TestNetworkStack.h b/TESTS/network/emac/emac_TestNetworkStack.h
index 8d325c6f89..d781d15190 100644
--- a/TESTS/network/emac/emac_TestNetworkStack.h
+++ b/TESTS/network/emac/emac_TestNetworkStack.h
@@ -356,6 +356,38 @@ protected:
                                      int optname, void *optval, unsigned *optlen);
 
 private:
+
+    /** Call in callback
+      *
+      *  Callback is used to call the call in method of the network stack.
+      */
+    typedef mbed::Callback<nsapi_error_t (int delay_ms, mbed::Callback<void()> user_cb)> call_in_callback_cb_t;
+
+    /** Get a call in callback
+     *
+     *  Get a call in callback from the network stack context.
+     *
+     *  Callback should not take more than 10ms to execute, otherwise it might
+     *  prevent underlying thread processing. A portable user of the callback
+     *  should not make calls to network operations due to stack size limitations.
+     *  The callback should not perform expensive operations such as socket recv/send
+     *  calls or blocking operations.
+     *
+     *  @return         Call in callback
+     */
+    virtual call_in_callback_cb_t get_call_in_callback();
+
+    /** Call a callback after a delay
+     *
+     *  Call a callback from the network stack context after a delay. If function
+     *  returns error callback will not be called.
+     *
+     *  @param delay    Delay in milliseconds
+     *  @param func     Callback to be called
+     *  @return         0 on success, negative error code on failure
+     */
+    virtual nsapi_error_t call_in(int delay, mbed::Callback<void()> func);
+
     Interface *m_interface;
 };
 
diff --git a/TESTS/network/emac/emac_util.cpp b/TESTS/network/emac/emac_util.cpp
index 9bffd9cf65..23ece204ce 100644
--- a/TESTS/network/emac/emac_util.cpp
+++ b/TESTS/network/emac/emac_util.cpp
@@ -36,6 +36,32 @@
 
 using namespace utest::v1;
 
+/* For LPC boards define the memory bank ourselves to give us section placement
+   control */
+#ifndef ETHMEM_SECTION
+#if defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
+#  if defined (__ICCARM__)
+#     define ETHMEM_SECTION
+#  elif defined(TOOLCHAIN_GCC_CR)
+#     define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
+#  else
+#     define ETHMEM_SECTION __attribute__((section("AHBSRAM0"),aligned))
+#  endif
+#elif defined(TARGET_LPC1768) || defined(TARGET_LPC1769)
+#  if defined (__ICCARM__)
+#     define ETHMEM_SECTION
+#  elif defined(TOOLCHAIN_GCC_CR)
+#     define ETHMEM_SECTION __attribute__((section(".data.$RamPeriph32")))
+#  else
+#     define ETHMEM_SECTION __attribute__((section("AHBSRAM1"),aligned))
+#  endif
+#endif
+#endif
+
+#ifndef ETHMEM_SECTION
+#define ETHMEM_SECTION
+#endif
+
 typedef struct {
     int length;
     int receipt_number;
@@ -63,7 +89,12 @@ static int eth_mtu_size = 0;
 // Event queue
 static rtos::Semaphore worker_loop_semaphore;
 static rtos::Semaphore link_status_semaphore;
-static EventQueue worker_loop_event_queue(20 * EVENTS_EVENT_SIZE);
+
+#if defined (__ICCARM__)
+#pragma location = ".ethusbram"
+#endif
+ETHMEM_SECTION static EventQueue worker_loop_event_queue(20 * EVENTS_EVENT_SIZE);
+
 static void worker_loop_event_cb(int event);
 static Event<void(int)> worker_loop_event(&worker_loop_event_queue, worker_loop_event_cb);
 static void link_input_event_cb(void *buf);
@@ -460,7 +491,11 @@ static void link_input_event_cb(void *buf)
     }
 }
 
-static unsigned char thread_stack[2048];
+
+#if defined (__ICCARM__)
+#pragma location = ".ethusbram"
+#endif
+ETHMEM_SECTION static unsigned char thread_stack[2048];
 
 void worker_loop(void);
 
diff --git a/TESTS/network/emac/emac_util.h b/TESTS/network/emac/emac_util.h
index 62b72fa022..08570341a3 100644
--- a/TESTS/network/emac/emac_util.h
+++ b/TESTS/network/emac/emac_util.h
@@ -58,7 +58,7 @@ extern const unsigned char eth_mac_broadcast_addr[];
 #define RESET_ERROR_FLAGS(flags) emac_if_reset_error_flags(flags)
 
 #define ETH_FRAME_HEADER_LEN    28
-#define ETH_FRAME_MIN_LEN       60
+#define ETH_FRAME_MIN_LEN       60 + 4
 #define ETH_MAC_ADDR_LEN        6
 
 #define TIMEOUT                 1