diff --git a/iocBoot/iocCygwin/serial.cmd b/iocBoot/iocCygwin/serial.cmd
index 55dc38885b7f45327719cc13821d6fee55d0a6d7..c7dbface0cc52d3ef4af7dcfff13f3adee465f2c 100644
--- a/iocBoot/iocCygwin/serial.cmd
+++ b/iocBoot/iocCygwin/serial.cmd
@@ -36,6 +36,8 @@ asynOctetSetOutputEos("serial2",0,"\r")
 drvAsynIPPortConfigure("serial3", "164.54.160.50:4001", 0, 0, 0)
 asynOctetConnect("serial3", "serial3")
 asynOctetSetInputEos("serial3",0,"\r")
+# For Digitel need to use null input terminator
+#asynOctetSetInputEos("serial3",0,"")
 asynOctetSetOutputEos("serial3",0,"\r")
 
 # serial 4 not connected for now
diff --git a/iocBoot/iocLinux/serial.cmd b/iocBoot/iocLinux/serial.cmd
index 9de69c3efa7e0e538ed5732ab31a1d7c63aacc44..d7e6d4ffe48df26071d92e5a580184a28dca1e1b 100644
--- a/iocBoot/iocLinux/serial.cmd
+++ b/iocBoot/iocLinux/serial.cmd
@@ -34,6 +34,8 @@ asynOctetSetOutputEos("serial2",0,"\r")
 #drvAsynIPPortConfigure("serial3", "164.54.160.50:4001", 0, 0, 0)
 #asynOctetConnect("serial3", "serial3")
 #asynOctetSetInputEos("serial3",0,"\r")
+# For Digitel need to use null input terminator
+#asynOctetSetInputEos("serial3",0,"")
 #asynOctetSetOutputEos("serial3",0,"\r")
 
 # serial 4 not connected for now
diff --git a/iocBoot/iocvxWorks/serial.cmd b/iocBoot/iocvxWorks/serial.cmd
index 905aacfe7001df332d2d4c3d5c1bf2de8f378626..064b86e3961c2eddfbb06d6bc6771eff88091fd1 100644
--- a/iocBoot/iocvxWorks/serial.cmd
+++ b/iocBoot/iocvxWorks/serial.cmd
@@ -19,7 +19,7 @@ tyGSOctalModuleInit("UART_0", "232", 0x80, 0, 0)
 # char *inputEos, char *outputEos)
 tyGSAsynInit("serial1",  "UART_0", 0, 9600,'N',2,8,'N',"\r","\r")  /* SRS570 */
 tyGSAsynInit("serial2",  "UART_0", 1,19200,'N',1,8,'N',"\r\n","\r")  /* Keithley 2000 */
-tyGSAsynInit("serial3",  "UART_0", 2, 9600,'E',1,7,'N',"\n","\n")  /* Digitel */
+tyGSAsynInit("serial3",  "UART_0", 2, 9600,'E',1,7,'N',"","\n")  /* Digitel */
 tyGSAsynInit("serial4",  "UART_0", 3, 9600,'N',1,8,'N',"\n","\n")  /* MPC */
 tyGSAsynInit("serial5",  "UART_0", 4,19200,'N',1,8,'N',"\r","\r")  /* ACS MCB-4B */
 tyGSAsynInit("serial6",  "UART_0", 5,19200,'N',1,8,'N',"\r\n","\r") /* Keithley 2000 */