diff --git a/modules/ca/src/client/cac.h b/modules/ca/src/client/cac.h
index 8fcb7c563..79dcbaa9b 100644
--- a/modules/ca/src/client/cac.h
+++ b/modules/ca/src/client/cac.h
@@ -203,7 +203,6 @@ public:
     void destroyIIU ( tcpiiu & iiu );
 
     const char * pLocalHostName ();
-    const resTable < tcpiiu, caServerID > & getServerTable();
 
 private:
     epicsSingleton < localHostName > :: reference _refLocalHostName;
@@ -425,10 +424,4 @@ inline double cac ::
     return this->connTMO;
 }
 
-inline const resTable < tcpiiu, caServerID > & cac ::
-    getServerTable()
-{
-    return this->serverTable;
-}
-
 #endif // ifndef INC_cac_H
diff --git a/modules/ca/src/client/cacChannel.cpp b/modules/ca/src/client/cacChannel.cpp
index a76d6e957..33345967c 100644
--- a/modules/ca/src/client/cacChannel.cpp
+++ b/modules/ca/src/client/cacChannel.cpp
@@ -129,13 +129,6 @@ unsigned cacChannel::getHostName (
     return 0u;
 }
 
-unsigned cacChannel::getHostMinorProtocol ( 
-    epicsGuard < epicsMutex > &) const throw ()
-{
-    epicsThreadOnce ( & cacChannelIdOnce, cacChannelSetup, 0);
-    return 0u;
-}
-
 // the default is to assume that it is a locally hosted channel
 const char * cacChannel::pHostName (
     epicsGuard < epicsMutex > & ) const throw ()
diff --git a/modules/ca/src/client/cacIO.h b/modules/ca/src/client/cacIO.h
index 777155047..760d8dd72 100644
--- a/modules/ca/src/client/cacIO.h
+++ b/modules/ca/src/client/cacIO.h
@@ -246,8 +246,7 @@ public:
     // !! deprecated, avoid use  !!
     virtual const char * pHostName (
         epicsGuard < epicsMutex > & guard ) const throw ();
-    virtual unsigned getHostMinorProtocol (
-        epicsGuard < epicsMutex > &) const throw () ;
+
     // exceptions
     class badString {};
     class badType {};
diff --git a/modules/ca/src/client/cadef.h b/modules/ca/src/client/cadef.h
index 5c60a06f7..e7ab45cbe 100644
--- a/modules/ca/src/client/cadef.h
+++ b/modules/ca/src/client/cadef.h
@@ -1460,17 +1460,6 @@ LIBCA_API const char * epicsStdCall ca_host_name (chid channel);
 LIBCA_API unsigned epicsStdCall ca_get_host_name ( chid pChan, 
     char *pBuf, unsigned bufLength );
 
-/** \brief Return the minor protocol version number used by the host to
- *  which a channel is cuurently connected.   
- *
- * \param[in] pChan channel identifier
- * \returns The minor protocol version number.
- * If the channel is disconnected CA_UKN_MINOR_VERSION is returned.
- */
-LIBCA_API unsigned epicsStdCall ca_host_minor_protocol (chid pChan);
-
-#define HAS_CA_HOST_MINOR_PROTOCOL
-
 /** \brief Call their function with their argument whenever
  *  a new fd is added or removed.
  *
diff --git a/modules/ca/src/client/nciu.cpp b/modules/ca/src/client/nciu.cpp
index fc5d3cb4c..a862cb228 100644
--- a/modules/ca/src/client/nciu.cpp
+++ b/modules/ca/src/client/nciu.cpp
@@ -410,13 +410,6 @@ const char * nciu::pHostName (
     return this->piiu->pHostName ( guard );
 }
 
-unsigned nciu::getHostMinorProtocol (
-    epicsGuard < epicsMutex > & guard) const throw ()
-{
-    return this->piiu->getHostMinorProtocol (
-        guard );
-}
-
 bool nciu::ca_v42_ok (
     epicsGuard < epicsMutex > & guard ) const
 {
diff --git a/modules/ca/src/client/nciu.h b/modules/ca/src/client/nciu.h
index 7e94fe1b8..d909aa917 100644
--- a/modules/ca/src/client/nciu.h
+++ b/modules/ca/src/client/nciu.h
@@ -183,8 +183,6 @@ public:
     unsigned getHostName (
         epicsGuard < epicsMutex > &,
         char * pBuf, unsigned bufLen ) const throw ();
-    unsigned getHostMinorProtocol (
-        epicsGuard < epicsMutex > &) const throw ();
     void writeException (
         epicsGuard < epicsMutex > &, epicsGuard < epicsMutex > &,
         int status, const char *pContext, unsigned type, arrayElementCount count );
diff --git a/modules/ca/src/client/netiiu.cpp b/modules/ca/src/client/netiiu.cpp
index 04a5fb524..c73732af6 100644
--- a/modules/ca/src/client/netiiu.cpp
+++ b/modules/ca/src/client/netiiu.cpp
@@ -116,12 +116,6 @@ const char * netiiu::pHostName (
     return pHostNameNetIIU;
 }
 
-unsigned netiiu::getHostMinorProtocol ( 
-    epicsGuard < epicsMutex > & ) const throw ()
-{
-  return CA_UKN_MINOR_VERSION;
-}
-
 osiSockAddr netiiu::getNetworkAddress (
     epicsGuard < epicsMutex > & ) const
 {
diff --git a/modules/ca/src/client/netiiu.h b/modules/ca/src/client/netiiu.h
index d21ed8428..298337bd3 100644
--- a/modules/ca/src/client/netiiu.h
+++ b/modules/ca/src/client/netiiu.h
@@ -43,8 +43,6 @@ public:
         unsigned bufLength ) const throw () = 0;
     virtual const char * pHostName (
         epicsGuard < epicsMutex > & ) const throw () = 0;
-    virtual unsigned getHostMinorProtocol ( 
-        epicsGuard < epicsMutex > & ) const throw ();
     virtual bool ca_v41_ok (
         epicsGuard < epicsMutex > & ) const = 0;
     virtual bool ca_v42_ok (
diff --git a/modules/ca/src/client/oldAccess.h b/modules/ca/src/client/oldAccess.h
index 3e8edb914..2c39d2768 100644
--- a/modules/ca/src/client/oldAccess.h
+++ b/modules/ca/src/client/oldAccess.h
@@ -64,8 +64,6 @@ public:
         chid pChan, char * pBuf, unsigned bufLength );
     friend const char * epicsStdCall ca_host_name (
         chid pChan );
-    friend unsigned epicsStdCall ca_host_minor_protocol (
-        chid pChan );
     friend const char * epicsStdCall ca_name (
         chid pChan );
     friend void epicsStdCall ca_set_puser (
diff --git a/modules/ca/src/client/oldChannelNotify.cpp b/modules/ca/src/client/oldChannelNotify.cpp
index 0a3512827..71688c94c 100644
--- a/modules/ca/src/client/oldChannelNotify.cpp
+++ b/modules/ca/src/client/oldChannelNotify.cpp
@@ -193,16 +193,6 @@ const char * epicsStdCall ca_host_name (
     return pChan->io.pHostName ( guard );
 }
 
-/*
- * ca_host_minorProtocol ()
- */
-unsigned epicsStdCall ca_host_minor_protocol (
-    chid pChan )
-{
-    epicsGuard < epicsMutex > guard ( pChan->cacCtx.mutexRef () );
-    return pChan->io.getHostMinorProtocol( guard );
-}
-
 /*
  * ca_set_puser ()
  */
diff --git a/modules/ca/src/client/tcpiiu.cpp b/modules/ca/src/client/tcpiiu.cpp
index b8ebaac32..30f6fad17 100644
--- a/modules/ca/src/client/tcpiiu.cpp
+++ b/modules/ca/src/client/tcpiiu.cpp
@@ -1804,13 +1804,6 @@ const char * tcpiiu::pHostName (
     return this->hostNameCacheInstance.pointer ();
 }
 
-unsigned tcpiiu::getHostMinorProtocol ( 
-    epicsGuard < epicsMutex > & guard) const throw ()
-{   
-    guard.assertIdenticalMutex ( this->mutex );
-    return this->minorProtocolVersion;
-}
-
 void tcpiiu::disconnectAllChannels (
     epicsGuard < epicsMutex > & cbGuard,
     epicsGuard < epicsMutex > & guard,
diff --git a/modules/ca/src/client/udpiiu.cpp b/modules/ca/src/client/udpiiu.cpp
index bfe3d628e..d36e2c5b4 100644
--- a/modules/ca/src/client/udpiiu.cpp
+++ b/modules/ca/src/client/udpiiu.cpp
@@ -1342,12 +1342,6 @@ const char * udpiiu::pHostName (
     return netiiu::pHostName ( cacGuard );
 }
 
-unsigned udpiiu::getHostMinorProtocol ( 
-    epicsGuard < epicsMutex > & cacGuard ) const throw ()
-{
-    return netiiu::getHostMinorProtocol ( cacGuard );
-}
-
 bool udpiiu::ca_v42_ok (
     epicsGuard < epicsMutex > & cacGuard ) const
 {
diff --git a/modules/ca/src/client/udpiiu.h b/modules/ca/src/client/udpiiu.h
index abc3fa757..aba79be5d 100644
--- a/modules/ca/src/client/udpiiu.h
+++ b/modules/ca/src/client/udpiiu.h
@@ -239,9 +239,7 @@ private:
         unsigned bufLength ) const throw ();
     const char * pHostName (
         epicsGuard < epicsMutex > & ) const throw ();
-    unsigned getHostMinorProtocol ( 
-        epicsGuard < epicsMutex > & ) const throw ();
-    bool ca_v41_ok (
+        bool ca_v41_ok (
         epicsGuard < epicsMutex > & ) const;
     bool ca_v42_ok (
         epicsGuard < epicsMutex > & ) const;
diff --git a/modules/ca/src/client/virtualCircuit.h b/modules/ca/src/client/virtualCircuit.h
index 0f43ea95e..42af12f5f 100644
--- a/modules/ca/src/client/virtualCircuit.h
+++ b/modules/ca/src/client/virtualCircuit.h
@@ -168,8 +168,6 @@ public:
     unsigned getHostName (
         epicsGuard < epicsMutex > &,
         char *pBuf, unsigned bufLength ) const throw ();
-    unsigned getHostMinorProtocol ( 
-        epicsGuard < epicsMutex > &) const throw ();
     bool alive (
         epicsGuard < epicsMutex > & ) const;
     bool connecting (