diff --git a/src/ph_socket.h b/src/ph_socket.h
index 97293c3..0d8cb6a 100644
--- a/src/ph_socket.h
+++ b/src/ph_socket.h
@@ -4,12 +4,12 @@
 /*
  * Procedure:
  *
- * If socket connection is establised, a PH_PRIM_CTRL_REQ message with
+ * If socket connection is established, a PH_PRIM_CTRL_REQ message with
  * PH_CTRL_ENABLE information is received by the socket server user.
  * If the socket connection is lost, a PH_PRIM_CTRL_REQ message with
  * PH_CTRL_DISABLE information is received by the user.
- * 
- * If socket connection is establised, a PH_PRIM_CTRL_IND message with
+ *
+ * If socket connection is established, a PH_PRIM_CTRL_IND message with
  * PH_CTRL_ENABLE information is received by the socket client user.
  * If the socket connection is lost, a PH_PRIM_CTRL_IND message with
  * PH_CTRL_DISABLE information is received by the user.
@@ -24,14 +24,14 @@
  * PH_PRIM_DACT_IND, if the socket is currently unavailable.
  *
  * PH_PRIM_CTRL_REQ and PH_PRIM_CTRL_IND messages with PH_CTRL_ENABLE
- * and PH_CTRL_DISABLE informations are not assoicated with a channel
+ * and PH_CTRL_DISABLE information are not associated with a channel
  * number. The socket sender shall set it to 0, the receiver shall
  * ignore it.
  *
- * A missing MODE in PH_PRIM_ACT_REQ is interepreted as default:
+ * A missing MODE in PH_PRIM_ACT_REQ is interpreted as default:
  * HDLC on D-channel, TRANS on B-channel.
  *
- * Each packet on the socket shall have the follwoing header:
+ * Each packet on the socket shall have the following header:
  *   uint8_t channel;
  *   uint8_t prim;
  *   uint16_t length;
@@ -65,8 +65,8 @@
 #define PH_CTRL_BLOCK		0x00	/* disable (block) interface, when socket is disconnected */
 #define PH_CTRL_UNBLOCK		0x01	/* enable (unblock) interface, when socket is connected */
 #define PH_CTRL_LOOP_DISABLE	0x04	/* disable loopback */
-#define PH_CTRL_LOOP1_ENABLE	0x05	/* enable LT transceier loopback */
-#define PH_CTRL_LOOP2_ENABLE	0x06	/* enable NT transceier loopback */
+#define PH_CTRL_LOOP1_ENABLE	0x05	/* enable LT transceiver loopback */
+#define PH_CTRL_LOOP2_ENABLE	0x06	/* enable NT transceiver loopback */
 #define PH_CTRL_LOOP_ERROR	0x10	/* frame error report (loopback test) */
 #define PH_CTRL_VIOLATION_LT	0x11	/* code violation received by LT */
 #define PH_CTRL_VIOLATION_NT	0x12	/* code violation received by NT */