diff --git a/bacnet-stack/Makefile b/bacnet-stack/Makefile
index e68f41fa..09c25f32 100644
--- a/bacnet-stack/Makefile
+++ b/bacnet-stack/Makefile
@@ -1,4 +1,5 @@
-all: readprop writeprop readfile writefile reinit server dcc whohas whois ucov timesync
+all: readprop writeprop readfile writefile reinit server dcc \
+	whohas whois ucov timesync epics
 	@echo "utilities are in the utils directory"
 
 clean: \
@@ -10,6 +11,7 @@ clean: \
 	demo/dcc/Makefile \
 	demo/whohas/Makefile \
 	demo/timesync/Makefile \
+	demo/epics/Makefile \
 	demo/whois/Makefile
 	( cd demo/readprop ; make clean )
 	( cd demo/writeprop ; make clean )
@@ -20,6 +22,7 @@ clean: \
 	( cd demo/dcc ; make clean )
 	( cd demo/whohas ; make clean )
 	( cd demo/timesync ; make clean )
+	( cd demo/epics ; make clean )
 	( cd demo/whois ; make clean )
 
 readprop: demo/readprop/Makefile
@@ -49,6 +52,9 @@ whohas: demo/whohas/Makefile
 timesync: demo/timesync/Makefile
 	( cd demo/timesync ; make clean ; make ; cp bacts ../../utils )
 
+epics: demo/epics/Makefile
+	( cd demo/epics ; make clean ; make ; cp bacts ../../utils )
+
 ucov: demo/ucov/Makefile
 	( cd demo/ucov ; make clean ; make ; cp bacucov ../../utils )
 
diff --git a/bacnet-stack/bip.h b/bacnet-stack/bip.h
index 21e4ac05..a7fc6d3b 100644
--- a/bacnet-stack/bip.h
+++ b/bacnet-stack/bip.h
@@ -51,10 +51,12 @@
 extern "C" {
 #endif                          /* __cplusplus */
 
-/* note: define init and cleanup in your ports section */
-    bool bip_init(void);
+    /* note: define init and cleanup in your ports section */
+    /* on Linux, ifname is eth0, ath0, arc0, and others.
+       on Windows, ifname is the dotted ip address of the interface */
+    bool bip_init(char *ifname);
 
-/* normal functions... */
+    /* normal functions... */
     void bip_cleanup(void);
     void bip_set_socket(int sock_fd);
     int bip_socket(void);
@@ -62,37 +64,35 @@ extern "C" {
     void bip_get_broadcast_address(BACNET_ADDRESS * dest);      /* destination address */
     void bip_get_my_address(BACNET_ADDRESS * my_address);
 
-/* function to send a packet out the BACnet/IP socket */
-/* returns zero on success, non-zero on failure */
+    /* function to send a packet out the BACnet/IP socket */
+    /* returns zero on success, non-zero on failure */
     int bip_send_pdu(BACNET_ADDRESS * dest,     /* destination address */
         BACNET_NPDU_DATA * npdu_data,   /* network information */
         uint8_t * pdu,          /* any data to be sent - may be null */
         unsigned pdu_len);      /* number of bytes of data */
 
-/* receives a BACnet/IP packet */
-/* returns the number of octets in the PDU, or zero on failure */
+    /* receives a BACnet/IP packet */
+    /* returns the number of octets in the PDU, or zero on failure */
     uint16_t bip_receive(BACNET_ADDRESS * src,  /* source address */
         uint8_t * pdu,          /* PDU data */
         uint16_t max_pdu,       /* amount of space available in the PDU  */
         unsigned timeout);      /* milliseconds to wait for a packet */
 
-/* use host byte order for setting */
+    /* use host byte order for setting */
     void bip_set_port(uint16_t port);
-/* returns host byte order */
+    /* returns host byte order */
     uint16_t bip_get_port(void);
 
-/* use network byte order for setting */
+    /* use network byte order for setting */
     void bip_set_addr(uint32_t net_address);
-/* returns host byte order */
+    /* returns host byte order */
     uint32_t bip_get_addr(void);
 
-/* use network byte order for setting */
+    /* use network byte order for setting */
     void bip_set_broadcast_addr(uint32_t net_address);
-/* returns host byte order */
+    /* returns host byte order */
     uint32_t bip_get_broadcast_addr(void);
 
-    void bip_set_interface(char *ifname);
-
 #ifdef __cplusplus
 }
 #endif                          /* __cplusplus */
diff --git a/bacnet-stack/datalink.h b/bacnet-stack/datalink.h
index 7ce29f1f..60230b36 100644
--- a/bacnet-stack/datalink.h
+++ b/bacnet-stack/datalink.h
@@ -37,6 +37,7 @@
 #if defined(BACDL_ETHERNET)
 #include "ethernet.h"
 
+#define datalink_init ethernet_init
 #define datalink_send_pdu ethernet_send_pdu
 #define datalink_receive ethernet_receive
 #define datalink_cleanup ethernet_cleanup
@@ -46,6 +47,7 @@
 #elif defined(BACDL_ARCNET)
 #include "arcnet.h"
 
+#define datalink_init arcnet_init
 #define datalink_send_pdu arcnet_send_pdu
 #define datalink_receive arcnet_receive
 #define datalink_cleanup arcnet_cleanup
@@ -55,6 +57,7 @@
 #elif defined(BACDL_MSTP)
 #include "dlmstp.h"
 
+#define datalink_init dlmstp_init
 #define datalink_send_pdu dlmstp_send_pdu
 #define datalink_receive dlmstp_receive
 #define datalink_cleanup dlmstp_cleanup
@@ -64,6 +67,7 @@
 #elif defined(BACDL_BIP)
 #include "bip.h"
 
+#define datalink_init bip_init
 #define datalink_send_pdu bip_send_pdu
 #define datalink_receive bip_receive
 #define datalink_cleanup bip_cleanup
@@ -79,7 +83,8 @@ extern uint16_t datalink_receive(BACNET_ADDRESS * src,
     uint8_t * pdu, uint16_t max_pdu, unsigned timeout);
 extern void datalink_cleanup(void);
 extern void datalink_get_broadcast_address(BACNET_ADDRESS * dest);
-extern void bip_get_my_address(BACNET_ADDRESS * my_address);
+extern void datalink_get_my_address(BACNET_ADDRESS * my_address);
+extern void datalink_set_interface(char *ifname);
 
 #endif
 
diff --git a/bacnet-stack/demo/dcc/main.c b/bacnet-stack/demo/dcc/main.c
index 2b7d7c17..eeb03ea1 100644
--- a/bacnet-stack/demo/dcc/main.c
+++ b/bacnet-stack/demo/dcc/main.c
@@ -138,21 +138,6 @@ static void Init_Service_Handlers(void)
     apdu_set_reject_handler(MyRejectHandler);
 }
 
-#ifdef BIP_DEBUG
-static void print_address(char *name, BACNET_ADDRESS * dest)
-{                               /* destination address */
-    int i = 0;                  /* counter */
-
-    if (dest) {
-        printf("%s: ", name);
-        for (i = 0; i < dest->mac_len; i++) {
-            printf("%02X", dest->mac[i]);
-        }
-        printf("\n");
-    }
-}
-#endif
-
 int main(int argc, char *argv[])
 {
     BACNET_ADDRESS src = { 0 }; /* address where message came from */
@@ -165,9 +150,6 @@ int main(int argc, char *argv[])
     time_t timeout_seconds = 0;
     uint8_t invoke_id = 0;
     bool found = false;
-#ifdef BIP_DEBUG
-    BACNET_ADDRESS my_address, broadcast_address;
-#endif
 
     if (argc < 3) {
         /* note: priority 16 and 0 should produce the same end results... */
@@ -202,27 +184,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-#ifdef BACDL_ETHERNET
-    /* init the physical layer */
-    if (!ethernet_init("eth0"))
+    if (!datalink_init(NULL))
         return 1;
-#endif
-#ifdef BACDL_BIP
-    bip_set_interface("eth0");
-    if (!bip_init())
-        return 1;
-    printf("bip: using port %hu\r\n", bip_get_port());
-#ifdef BIP_DEBUG
-    datalink_get_broadcast_address(&broadcast_address);
-    print_address("Broadcast", &broadcast_address);
-    datalink_get_my_address(&my_address);
-    print_address("Address", &my_address);
-#endif
-#endif
-#ifdef BACDL_ARCNET
-    if (!arcnet_init("arc0"))
-        return 1;
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
diff --git a/bacnet-stack/demo/epics/main.c b/bacnet-stack/demo/epics/main.c
index 74db9a3e..a6c1dd80 100644
--- a/bacnet-stack/demo/epics/main.c
+++ b/bacnet-stack/demo/epics/main.c
@@ -342,28 +342,8 @@ int main(int argc, char *argv[])
     /* setup my info */
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
-    Init_Service_Handlers();
-#if defined(BACDL_ETHERNET)
-    /* init the physical layer */
-    if (!Network_Interface)
-        Network_Interface = "eth0";
-    if (!ethernet_init(Network_Interface))
-        return 1;
-#elif defined(BACDL_BIP)
-    if (!Network_Interface)
-        Network_Interface = "eth0";
-    bip_set_interface(Network_Interface);
-    if (!bip_init())
-        return 1;
-    /* printf("bip: using port %hu\r\n", bip_get_port()); */
-#elif defined(BACDL_ARCNET)
-    if (!Network_Interface)
-        Network_Interface = "arc0";
-    if (!arcnet_init(Network_Interface))
-        return 1;
-#else
-#error Define a datalink (BACDL_ETHERNET,BACDL_BIP, or BACDL_ARCNET)
-#endif
+    Init_Service_Handlers();
+    datalink_init(Network_Interface);
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
diff --git a/bacnet-stack/demo/readfile/main.c b/bacnet-stack/demo/readfile/main.c
index 0b219ed2..0ff8dc5d 100644
--- a/bacnet-stack/demo/readfile/main.c
+++ b/bacnet-stack/demo/readfile/main.c
@@ -230,21 +230,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-#ifdef BACDL_ETHERNET
-    /* init the physical layer */
-    if (!ethernet_init("eth0"))
+    if (!datalink_init(NULL))
         return 1;
-#endif
-#ifdef BACDL_BIP
-    bip_set_interface("eth0");
-    if (!bip_init())
-        return 1;
-    printf("bip: using port %hu\r\n", bip_get_port());
-#endif
-#ifdef BACDL_ARCNET
-    if (!arcnet_init("arc0"))
-        return 1;
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
diff --git a/bacnet-stack/demo/readprop/Makefile b/bacnet-stack/demo/readprop/Makefile
index a1c54538..ca60dbf3 100644
--- a/bacnet-stack/demo/readprop/Makefile
+++ b/bacnet-stack/demo/readprop/Makefile
@@ -20,7 +20,7 @@ CFLAGS  = -Wall -g $(INCLUDES) $(DEFINES)
 
 TARGET = bacrp
 
-SRCS = readprop.c \
+SRCS = main.c \
        $(BACNET_PORT)/bip-init.c \
        $(BACNET_PORT)/ethernet.c \
        $(BACNET_PORT)/arcnet.c \
diff --git a/bacnet-stack/demo/readprop/readprop.c b/bacnet-stack/demo/readprop/main.c
similarity index 95%
rename from bacnet-stack/demo/readprop/readprop.c
rename to bacnet-stack/demo/readprop/main.c
index d0b887fa..cd71dfbe 100644
--- a/bacnet-stack/demo/readprop/readprop.c
+++ b/bacnet-stack/demo/readprop/main.c
@@ -175,21 +175,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-#if defined(BACDL_ETHERNET)
-    /* init the physical layer */
-    if (!ethernet_init("eth0"))
+    if (!datalink_init(NULL))
         return 1;
-#elif defined(BACDL_BIP)
-    bip_set_interface("eth0");
-    if (!bip_init())
-        return 1;
-    printf("bip: using port %hu\r\n", bip_get_port());
-#elif defined(BACDL_ARCNET)
-    if (!arcnet_init("arc0"))
-        return 1;
-#else
-#error Datalink (BACDL_ETHERNET,BACDL_BIP, or BACDL_ARCNET) undefined
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
diff --git a/bacnet-stack/demo/readprop/makefile.b32 b/bacnet-stack/demo/readprop/makefile.b32
index 2ac4b190..a59bacbc 100644
--- a/bacnet-stack/demo/readprop/makefile.b32
+++ b/bacnet-stack/demo/readprop/makefile.b32
@@ -17,7 +17,7 @@ PRODUCT_EXE = $(PRODUCT).exe
 # Choose the Data Link Layer to Enable
 DEFINES = -DBACDL_BIP=1;TSM_ENABLED=1;BIG_ENDIAN=0;PRINT_ENABLED=1
 
-SRCS = readprop.c \
+SRCS = main.c \
        ..\..\ports\win32\bip-init.c \
        ..\..\filename.c \
        ..\..\bip.c  \
diff --git a/bacnet-stack/demo/reinit/main.c b/bacnet-stack/demo/reinit/main.c
index e33118ff..b0661ecb 100644
--- a/bacnet-stack/demo/reinit/main.c
+++ b/bacnet-stack/demo/reinit/main.c
@@ -133,21 +133,6 @@ static void Init_Service_Handlers(void)
     apdu_set_reject_handler(MyRejectHandler);
 }
 
-#ifdef BIP_DEBUG
-static void print_address(char *name, BACNET_ADDRESS * dest)
-{                               /* destination address */
-    int i = 0;                  /* counter */
-
-    if (dest) {
-        printf("%s: ", name);
-        for (i = 0; i < dest->mac_len; i++) {
-            printf("%02X", dest->mac[i]);
-        }
-        printf("\n");
-    }
-}
-#endif
-
 int main(int argc, char *argv[])
 {
     BACNET_ADDRESS src = { 0 }; /* address where message came from */
@@ -160,9 +145,6 @@ int main(int argc, char *argv[])
     time_t timeout_seconds = 0;
     uint8_t invoke_id = 0;
     bool found = false;
-#ifdef BIP_DEBUG
-    BACNET_ADDRESS my_address, broadcast_address;
-#endif
 
     if (argc < 3) {
         /* note: priority 16 and 0 should produce the same end results... */
@@ -199,17 +181,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
-#ifdef BIP_DEBUG
-    datalink_get_broadcast_address(&broadcast_address);
-    print_address("Broadcast", &broadcast_address);
-    datalink_get_my_address(&my_address);
-    print_address("Address", &my_address);
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
@@ -223,7 +196,11 @@ int main(int argc, char *argv[])
         current_seconds = time(NULL);
 
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(
+            &src, 
+            &Rx_Buf[0], 
+            MAX_MPDU, 
+            timeout);
 
         /* process */
         if (pdu_len) {
diff --git a/bacnet-stack/demo/server/main.c b/bacnet-stack/demo/server/main.c
index ec4fdae2..01c7cdc2 100644
--- a/bacnet-stack/demo/server/main.c
+++ b/bacnet-stack/demo/server/main.c
@@ -122,21 +122,8 @@ int main(int argc, char *argv[])
     printf("BACnet Server Demo - Device #%u\r\n",
         Device_Object_Instance_Number());
     Init_Service_Handlers();
-#ifdef BACDL_ETHERNET
-    /* init the physical layer */
-    if (!ethernet_init("eth0"))
+    if (!datalink_init(NULL))
         return 1;
-#endif
-#ifdef BACDL_BIP
-    bip_set_interface("eth0");
-    if (!bip_init())
-        return 1;
-    printf("bip: using port %hu\r\n", bip_get_port());
-#endif
-#ifdef BACDL_ARCNET
-    if (!arcnet_init("arc0"))
-        return 1;
-#endif
     datalink_get_broadcast_address(&broadcast_address);
     print_address("Broadcast", &broadcast_address);
     datalink_get_my_address(&my_address);
diff --git a/bacnet-stack/demo/timesync/main.c b/bacnet-stack/demo/timesync/main.c
index 898eed4a..03548a1a 100644
--- a/bacnet-stack/demo/timesync/main.c
+++ b/bacnet-stack/demo/timesync/main.c
@@ -103,21 +103,6 @@ static void Init_Service_Handlers(void)
     apdu_set_reject_handler(MyRejectHandler);
 }
 
-#ifdef BIP_DEBUG
-static void print_address(char *name, BACNET_ADDRESS * dest)
-{                               /* destination address */
-    int i = 0;                  /* counter */
-
-    if (dest) {
-        printf("%s: ", name);
-        for (i = 0; i < dest->mac_len; i++) {
-            printf("%02X", dest->mac[i]);
-        }
-        printf("\n");
-    }
-}
-#endif
-
 int main(int argc, char *argv[])
 {
     BACNET_ADDRESS src = { 0 }; /* address where message came from */
@@ -132,10 +117,6 @@ int main(int argc, char *argv[])
     BACNET_DATE bdate;
     BACNET_TIME btime;
 
-#ifdef BIP_DEBUG
-    BACNET_ADDRESS my_address, broadcast_address;
-#endif
-
     /* FIXME: we could send directed time sync, and how do we send UTC? */
 #if 0
     if (argc < 2) {
@@ -164,17 +145,8 @@ int main(int argc, char *argv[])
     /* setup my info */
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
-#ifdef BIP_DEBUG
-    datalink_get_broadcast_address(&broadcast_address);
-    print_address("Broadcast", &broadcast_address);
-    datalink_get_my_address(&my_address);
-    print_address("Address", &my_address);
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = Device_APDU_Timeout() / 1000;
@@ -195,7 +167,7 @@ int main(int argc, char *argv[])
         /* increment timer - exit if timed out */
         current_seconds = time(NULL);
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
         /* process */
         if (pdu_len) {
             npdu_handler(&src, &Rx_Buf[0], pdu_len);
diff --git a/bacnet-stack/demo/ucov/main.c b/bacnet-stack/demo/ucov/main.c
index 775d2f72..fabd8d42 100644
--- a/bacnet-stack/demo/ucov/main.c
+++ b/bacnet-stack/demo/ucov/main.c
@@ -202,19 +202,13 @@ int main(int argc, char *argv[])
         fprintf(stderr, "unable to parse the tag value\r\n");
         return 1;
     }
-
     /* setup my info */
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
-    Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
-        return 1;
-
+    Init_Service_Handlers();
+    if (!datalink_init(NULL))
+        return 1;
     /* only one value in our value list */
     cov_data.listOfValues.next = NULL;
-
     ucov_notify_send(&Handler_Transmit_Buffer[0], &cov_data);
 
     return 0;
diff --git a/bacnet-stack/demo/whohas/main.c b/bacnet-stack/demo/whohas/main.c
index 22aeea4d..c10e4ee8 100644
--- a/bacnet-stack/demo/whohas/main.c
+++ b/bacnet-stack/demo/whohas/main.c
@@ -103,21 +103,6 @@ static void Init_Service_Handlers(void)
     apdu_set_reject_handler(MyRejectHandler);
 }
 
-#ifdef BIP_DEBUG
-static void print_address(char *name, BACNET_ADDRESS * dest)
-{                               /* destination address */
-    int i = 0;                  /* counter */
-
-    if (dest) {
-        printf("%s: ", name);
-        for (i = 0; i < dest->mac_len; i++) {
-            printf("%02X", dest->mac[i]);
-        }
-        printf("\n");
-    }
-}
-#endif
-
 int main(int argc, char *argv[])
 {
     BACNET_ADDRESS src = { 0 }; /* address where message came from */
@@ -127,9 +112,6 @@ int main(int argc, char *argv[])
     time_t last_seconds = 0;
     time_t current_seconds = 0;
     time_t timeout_seconds = 0;
-#ifdef BIP_DEBUG
-    BACNET_ADDRESS my_address, broadcast_address;
-#endif
 
     if (argc < 2) {
         /* note: priority 16 and 0 should produce the same end results... */
@@ -166,17 +148,8 @@ int main(int argc, char *argv[])
     /* setup my info */
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
-#ifdef BIP_DEBUG
-    datalink_get_broadcast_address(&broadcast_address);
-    print_address("Broadcast", &broadcast_address);
-    datalink_get_my_address(&my_address);
-    print_address("Address", &my_address);
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = Device_APDU_Timeout() / 1000;
@@ -191,7 +164,7 @@ int main(int argc, char *argv[])
         /* increment timer - exit if timed out */
         current_seconds = time(NULL);
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
         /* process */
         if (pdu_len) {
             npdu_handler(&src, &Rx_Buf[0], pdu_len);
diff --git a/bacnet-stack/demo/whois/main.c b/bacnet-stack/demo/whois/main.c
index 1231645a..612a302e 100644
--- a/bacnet-stack/demo/whois/main.c
+++ b/bacnet-stack/demo/whois/main.c
@@ -99,21 +99,6 @@ static void Init_Service_Handlers(void)
     apdu_set_reject_handler(MyRejectHandler);
 }
 
-#ifdef BIP_DEBUG
-static void print_address(char *name, BACNET_ADDRESS * dest)
-{                               /* destination address */
-    int i = 0;                  /* counter */
-
-    if (dest) {
-        printf("%s: ", name);
-        for (i = 0; i < dest->mac_len; i++) {
-            printf("%02X", dest->mac[i]);
-        }
-        printf("\n");
-    }
-}
-#endif
-
 static void print_address_cache(void)
 {
     int i, j;
@@ -144,9 +129,6 @@ int main(int argc, char *argv[])
     time_t last_seconds = 0;
     time_t current_seconds = 0;
     time_t timeout_seconds = 0;
-#ifdef BIP_DEBUG
-    BACNET_ADDRESS my_address, broadcast_address;
-#endif
 
     if (argc < 2) {
         printf
@@ -186,17 +168,8 @@ int main(int argc, char *argv[])
     /* setup my info */
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
-#ifdef BIP_DEBUG
-    datalink_get_broadcast_address(&broadcast_address);
-    print_address("Broadcast", &broadcast_address);
-    datalink_get_my_address(&my_address);
-    print_address("Address", &my_address);
-#endif
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = Device_APDU_Timeout() / 1000;
@@ -207,7 +180,7 @@ int main(int argc, char *argv[])
         /* increment timer - exit if timed out */
         current_seconds = time(NULL);
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
         /* process */
         if (pdu_len) {
             npdu_handler(&src, &Rx_Buf[0], pdu_len);
diff --git a/bacnet-stack/demo/writefile/Makefile b/bacnet-stack/demo/writefile/Makefile
index c3fc7798..1e6ca1a0 100644
--- a/bacnet-stack/demo/writefile/Makefile
+++ b/bacnet-stack/demo/writefile/Makefile
@@ -20,7 +20,7 @@ CFLAGS  = -Wall -g $(INCLUDES) $(DEFINES)
 
 TARGET = bacawf
 
-SRCS = writefile.c \
+SRCS = main.c \
        $(BACNET_PORT)/bip-init.c \
        $(BACNET_ROOT)/bip.c \
        $(BACNET_HANDLER)/txbuf.c \
diff --git a/bacnet-stack/demo/writefile/writefile.c b/bacnet-stack/demo/writefile/main.c
similarity index 98%
rename from bacnet-stack/demo/writefile/writefile.c
rename to bacnet-stack/demo/writefile/main.c
index 36111536..59675946 100644
--- a/bacnet-stack/demo/writefile/writefile.c
+++ b/bacnet-stack/demo/writefile/main.c
@@ -186,10 +186,7 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
     /* configure the timeout values */
     last_seconds = time(NULL);
@@ -204,7 +201,7 @@ int main(int argc, char *argv[])
         current_seconds = time(NULL);
 
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
 
         /* process */
         if (pdu_len) {
diff --git a/bacnet-stack/demo/writefile/writefile.ide b/bacnet-stack/demo/writefile/main.ide
similarity index 100%
rename from bacnet-stack/demo/writefile/writefile.ide
rename to bacnet-stack/demo/writefile/main.ide
diff --git a/bacnet-stack/demo/writefile/makefile.b32 b/bacnet-stack/demo/writefile/makefile.b32
index 10a80170..7578dce5 100644
--- a/bacnet-stack/demo/writefile/makefile.b32
+++ b/bacnet-stack/demo/writefile/makefile.b32
@@ -17,7 +17,7 @@ PRODUCT_EXE = $(PRODUCT).exe
 # Choose the Data Link Layer to Enable
 DEFINES = -DBACDL_BIP=1;TSM_ENABLED=1;BIG_ENDIAN=0;PRINT_ENABLED=1
 
-SRCS = writefile.c \
+SRCS = main.c \
        ..\..\ports\win32\bip-init.c \
        ..\..\bip.c  \
        ..\..\demo\handler\txbuf.c  \
diff --git a/bacnet-stack/demo/writeprop/main.c b/bacnet-stack/demo/writeprop/main.c
index 29a43578..9ad374d7 100644
--- a/bacnet-stack/demo/writeprop/main.c
+++ b/bacnet-stack/demo/writeprop/main.c
@@ -310,11 +310,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(BACNET_MAX_INSTANCE);
     address_init();
     Init_Service_Handlers();
-    /* configure standard BACnet/IP port */
-    bip_set_interface("eth0");  /* for linux */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
-        return 1;
+    if (!datalink_init(NULL))
+        return 1;
     /* configure the timeout values */
     last_seconds = time(NULL);
     timeout_seconds = (Device_APDU_Timeout() / 1000) *
@@ -328,7 +325,7 @@ int main(int argc, char *argv[])
         current_seconds = time(NULL);
 
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
 
         /* process */
         if (pdu_len) {
diff --git a/bacnet-stack/makefile.b32 b/bacnet-stack/makefile.b32
index 5517e3ce..ec547293 100644
--- a/bacnet-stack/makefile.b32
+++ b/bacnet-stack/makefile.b32
@@ -8,7 +8,7 @@ BORLAND_DIR_Not_Defined:
 !endif
 
 all: readprop writeprop readfile writefile server dcc reinit \
-  whois whohas timesync ucov
+  whois whohas timesync ucov epics
   @echo "demo utilities are in utils directory"
 
 clean: \
@@ -22,6 +22,7 @@ clean: \
   demo/whois/makefile.b32 \
   demo/whohas/makefile.b32 \
   demo/ucov/makefile.b32 \
+  demo/epics/makefile.b32 \
   demo/timesync/makefile.b32
   cd demo/readprop
   make -i -f makefile.b32 clean
@@ -63,6 +64,10 @@ clean: \
   make -i -f makefile.b32 clean
   cd ..
   cd ..
+  cd demo/epics
+  make -i -f makefile.b32 clean
+  cd ..
+  cd ..
   cd demo/timesync
   make -i -f makefile.b32 clean
   cd ..
@@ -148,6 +153,14 @@ ucov: demo/ucov/makefile.b32
   cd ..
   cd ..
 
+epics: demo/epics/makefile.b32
+	cd demo/epics
+  make -i -f makefile.b32 clean
+  make -f makefile.b32 all
+  make -f makefile.b32 install
+  cd ..
+  cd ..
+
 timesync: demo/timesync/makefile.b32
 	cd demo/timesync
   make -i -f makefile.b32 clean
diff --git a/bacnet-stack/ports/linux/arcnet.c b/bacnet-stack/ports/linux/arcnet.c
index ca210394..99691583 100644
--- a/bacnet-stack/ports/linux/arcnet.c
+++ b/bacnet-stack/ports/linux/arcnet.c
@@ -178,7 +178,10 @@ static int arcnet_bind(char *interface_name)
 
 bool arcnet_init(char *interface_name)
 {
-    ARCNET_Sock_FD = arcnet_bind(interface_name);
+    if (interface_name)
+        ARCNET_Sock_FD = arcnet_bind(interface_name);
+    else
+        ARCNET_Sock_FD = arcnet_bind("arc0");
 
     return arcnet_valid();
 }
diff --git a/bacnet-stack/ports/linux/bip-init.c b/bacnet-stack/ports/linux/bip-init.c
index 541d3203..3e75062c 100644
--- a/bacnet-stack/ports/linux/bip-init.c
+++ b/bacnet-stack/ports/linux/bip-init.c
@@ -71,7 +71,9 @@ static int get_local_address_ioctl(char *ifname,
     return rv;
 }
 
-void bip_set_interface(char *ifname)
+
+/* on Linux, ifname is eth0, ath0, arc0, and others. */
+static void bip_set_interface(char *ifname)
 {
     struct in_addr local_address;
     struct in_addr broadcast_address;
@@ -91,13 +93,15 @@ void bip_set_interface(char *ifname)
 #endif
 }
 
-bool bip_init(void)
+bool bip_init(char *ifname)
 {
     int status = 0;             /* return from socket lib calls */
     struct sockaddr_in sin;
     int sockopt = 0;
     int sock_fd = -1;
 
+    if (ifname)
+        bip_set_interface(ifname);
     /* assumes that the driver has already been initialized */
     sock_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
     bip_set_socket(sock_fd);
diff --git a/bacnet-stack/ports/linux/ethernet.c b/bacnet-stack/ports/linux/ethernet.c
index d7373d75..9838286f 100644
--- a/bacnet-stack/ports/linux/ethernet.c
+++ b/bacnet-stack/ports/linux/ethernet.c
@@ -170,8 +170,13 @@ static int get_local_hwaddr(const char *ifname, unsigned char *mac)
 
 bool ethernet_init(char *interface_name)
 {
-    get_local_hwaddr(interface_name, Ethernet_MAC_Address);
-    eth802_sockfd = ethernet_bind(&eth_addr, interface_name);
+    if (interface_name) {
+        get_local_hwaddr(interface_name, Ethernet_MAC_Address);
+        eth802_sockfd = ethernet_bind(&eth_addr, interface_name);
+    } else {
+        get_local_hwaddr("eth0", Ethernet_MAC_Address);
+        eth802_sockfd = ethernet_bind(&eth_addr, "eth0");
+    }
 
     return ethernet_valid();
 }
diff --git a/bacnet-stack/ports/rtos32/bip-init.c b/bacnet-stack/ports/rtos32/bip-init.c
index f223eb15..ed56face 100644
--- a/bacnet-stack/ports/rtos32/bip-init.c
+++ b/bacnet-stack/ports/rtos32/bip-init.c
@@ -39,12 +39,6 @@
 
 static int interface = SOCKET_ERROR;    /* SOCKET_ERROR means no open interface */
 
-void bip_set_interface(char *ifname)
-{
-    /*dummy function - to make the demos compile easier */
-    (void) ifname;
-}
-
 /*-----------------------------------*/
 static void Error(const char *Msg)
 {
@@ -244,7 +238,7 @@ static void set_broadcast_address(uint32_t net_address)
 #endif
 }
 
-bool bip_init(void)
+bool bip_init(char *ifname)
 {
     int rv = 0;                 /* return from socket lib calls */
     struct sockaddr_in sin = { -1 };
@@ -252,6 +246,8 @@ bool bip_init(void)
     int sock_fd = -1;
     struct in_addr my_addr;
 
+    (void)ifname;
+
     NetInitialize();
 
     RTIP_To_Network_Address(TargetIP, &my_addr);
diff --git a/bacnet-stack/ports/rtos32/dlmstp.c b/bacnet-stack/ports/rtos32/dlmstp.c
index 4a3adfe8..8775972e 100644
--- a/bacnet-stack/ports/rtos32/dlmstp.c
+++ b/bacnet-stack/ports/rtos32/dlmstp.c
@@ -42,8 +42,9 @@ static uint8_t PDU_Buffer[MAX_MPDU];
 /* local MS/TP port data */
 static volatile struct mstp_port_struct_t MSTP_Port;
 
-void dlmstp_init(void)
-{
+void dlmstp_init(char *ifname)
+{
+    (void)ifname;
     /* initialize buffer */
     Receive_Buffer.ready = false;
     Receive_Buffer.pdu_len = 0;
diff --git a/bacnet-stack/ports/rtos32/main.c b/bacnet-stack/ports/rtos32/main.c
index dfe95ad0..9807c704 100644
--- a/bacnet-stack/ports/rtos32/main.c
+++ b/bacnet-stack/ports/rtos32/main.c
@@ -140,18 +140,10 @@ int main(int argc, char *argv[])
     Init_Service_Handlers();
     RTOS_Initialize();
     /* init the physical layer */
-#ifdef BACDL_BIP
-    if (!bip_init())
-        return 1;
-#endif
-#ifdef BACDL_ETHERNET
-    if (!ethernet_init(NULL))
-        return 1;
-#endif
 #ifdef BACDL_MSTP
     dlmstp_set_my_address(0x05);
-    dlmstp_init();
 #endif
+    datalink_init(NULL);
     iam_send(&Handler_Transmit_Buffer[0]);
     /* loop forever */
     for (;;) {
diff --git a/bacnet-stack/ports/win32/bip-init.c b/bacnet-stack/ports/win32/bip-init.c
index ad0e9c94..45a59c4b 100644
--- a/bacnet-stack/ports/win32/bip-init.c
+++ b/bacnet-stack/ports/win32/bip-init.c
@@ -99,13 +99,32 @@ static void cleanup(void)
     WSACleanup();
 }
 
+
+/* on Windows, ifname is the dotted ip address of the interface */
 void bip_set_interface(char *ifname)
 {
-    (void) ifname;
-    /* dummy function */
+    struct in_addr address;
+
+    /* setup local address */
+    if (bip_get_addr() == 0) {
+        bip_set_addr(inet_addr(ifname));
+    }
+#ifdef BIP_DEBUG
+    fprintf(stderr, "IP Address: %s\n", inet_ntoa(address));
+#endif
+    /* setup local broadcast address */
+    if (bip_get_broadcast_addr() == 0) {
+        address.s_addr = htonl(bip_get_addr());
+        set_broadcast_address(address.s_addr);
+    }
+#ifdef BIP_DEBUG
+    address.s_addr = htonl(bip_get_broadcast_addr());
+    fprintf(stderr, "Broadcast Address: %s\n",
+        inet_ntoa(address));
+#endif
 }
 
-bool bip_init(void)
+bool bip_init(char *ifname)
 {
     int rv = 0;                 /* return from socket lib calls */
     struct sockaddr_in sin = { -1 };
@@ -126,7 +145,9 @@ bool bip_init(void)
         exit(1);
     }
     atexit(cleanup);
-
+    
+    if (ifname)
+        bip_set_interface(ifname);
     /* has address been set? */
     address.s_addr = htonl(bip_get_addr());
     if (address.s_addr == 0) {
diff --git a/bacnet-stack/ports/win32/main.c b/bacnet-stack/ports/win32/main.c
index d07b98af..7d0d76f8 100644
--- a/bacnet-stack/ports/win32/main.c
+++ b/bacnet-stack/ports/win32/main.c
@@ -214,11 +214,8 @@ int main(int argc, char *argv[])
     Device_Set_Object_Instance_Number(124);
     Init_Service_Handlers();
     /* init the data link layer */
-    /* configure standard BACnet/IP port */
-    bip_set_port(0xBAC0);
-    if (!bip_init())
+    if (!datalink_init(NULL))
         return 1;
-
     datalink_get_broadcast_address(&broadcast_address);
     print_address("Broadcast", &broadcast_address);
     datalink_get_my_address(&my_address);
@@ -230,10 +227,8 @@ int main(int argc, char *argv[])
         /* input */
 
         /* returns 0 bytes on timeout */
-        pdu_len = bip_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
-
+        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
         /* process */
-
         if (pdu_len) {
             npdu_handler(&src, &Rx_Buf[0], pdu_len);
         }