diff --git a/configure b/configure
index fbcaa12362..c7821cc29c 100755
--- a/configure
+++ b/configure
@@ -1231,6 +1231,7 @@ PBX_BISON
 OPENSSL
 SHA1SUM
 LDCONFIG
+DOWNLOAD_TIMEOUT
 DOWNLOAD_TO_STDOUT
 DOWNLOAD
 FETCH
@@ -1257,6 +1258,8 @@ COMPRESS
 FIND
 PYTHON
 FLEX
+CUT
+CAT
 CMP
 BISON
 GNU_LD
@@ -6804,6 +6807,88 @@ $as_echo "no" >&6; }
 fi
 
 
+# Extract the first word of "cat", so it can be a program name with args.
+set dummy cat; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CAT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CAT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CAT="$CAT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CAT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_CAT" && ac_cv_path_CAT=":"
+  ;;
+esac
+fi
+CAT=$ac_cv_path_CAT
+if test -n "$CAT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CAT" >&5
+$as_echo "$CAT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+# Extract the first word of "cut", so it can be a program name with args.
+set dummy cut; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_CUT+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  case $CUT in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_CUT="$CUT" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_CUT="$as_dir/$ac_word$ac_exec_ext"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+  test -z "$ac_cv_path_CUT" && ac_cv_path_CUT=":"
+  ;;
+esac
+fi
+CUT=$ac_cv_path_CUT
+if test -n "$CUT"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CUT" >&5
+$as_echo "$CUT" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
 # Extract the first word of "flex", so it can be a program name with args.
 set dummy flex; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -7874,9 +7959,11 @@ fi
 if test "${WGET}" != ":" ; then
   DOWNLOAD=${WGET}
   DOWNLOAD_TO_STDOUT="${WGET} -O-"
+  DOWNLOAD_TIMEOUT='--timeout=$1'
 else if test "${CURL}" != ":" ; then
   DOWNLOAD="${CURL} -O --progress-bar -w \"%{url_effective}\n\""
   DOWNLOAD_TO_STDOUT="${CURL} -L --progress-bar -w \"%{url_effective}\n\""
+  DOWNLOAD_TIMEOUT='--max-time $(or $2,$1)'
 else
   # Extract the first word of "fetch", so it can be a program name with args.
 set dummy fetch; ac_word=$2
@@ -7921,11 +8008,14 @@ fi
 
   DOWNLOAD=${FETCH}
   DOWNLOAD_TO_STDOUT="${FETCH} -o-"
+  DOWNLOAD_TIMEOUT='--timeout=$(or $2,$1)'
 fi
 fi
 
 
 
+
+
 # Extract the first word of "ldconfig", so it can be a program name with args.
 set dummy ldconfig; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -9247,8 +9337,14 @@ $as_echo "configuring" >&6; }
 	if test "${NM}" = ":" ; then
 		as_fn_error $? "nm is required to build bundled pjproject" "$LINENO" 5
 	fi
+	if test "${MD5}" = ":" ; then
+		as_fn_error $? "md5dum is required to build bundled pjproject" "$LINENO" 5
+	fi
+	if test "${CAT}" = ":" ; then
+		as_fn_error $? "cat is required to build bundled pjproject" "$LINENO" 5
+	fi
 
-	export TAR PATCH SED NM EXTERNALS_CACHE_DIR DOWNLOAD_TO_STDOUT
+	export TAR PATCH SED NM EXTERNALS_CACHE_DIR DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT
 	${GNU_MAKE} --quiet --no-print-directory -C ${PJPROJECT_DIR} EXTERNALS_CACHE_DIR=${EXTERNALS_CACHE_DIR} configure
 	if test $? -ne 0 ; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
diff --git a/configure.ac b/configure.ac
index 61a3f33eb7..0f9b3442b8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -263,6 +263,7 @@ AC_SUBST(GNU_LD)
 
 AC_PATH_PROG([BISON], [bison], :)
 AC_PATH_PROG([CMP], [cmp], :)
+AC_PATH_PROG([CAT], [cat], :)
 AC_PATH_PROG([FLEX], [flex], :)
 AC_PATH_PROG([GREP], [grep], :)
 AC_PATH_PROG([PYTHON], [python], :)
@@ -293,18 +294,23 @@ AC_PATH_PROG([NM], [nm], :)
 if test "${WGET}" != ":" ; then
   DOWNLOAD=${WGET}
   DOWNLOAD_TO_STDOUT="${WGET} -O-"
+  DOWNLOAD_TIMEOUT='--timeout=$1'
 else if test "${CURL}" != ":" ; then
   DOWNLOAD="${CURL} -O --progress-bar -w \"%{url_effective}\n\""
   DOWNLOAD_TO_STDOUT="${CURL} -L --progress-bar -w \"%{url_effective}\n\""
+  DOWNLOAD_TIMEOUT='--max-time $(or $2,$1)'
 else
   AC_PATH_PROG([FETCH], [fetch], [:])
   DOWNLOAD=${FETCH}
   DOWNLOAD_TO_STDOUT="${FETCH} -o-"
+  DOWNLOAD_TIMEOUT='--timeout=$(or $2,$1)'
 fi
 fi
 
 AC_SUBST(DOWNLOAD)
 AC_SUBST(DOWNLOAD_TO_STDOUT)
+AC_SUBST(DOWNLOAD_TIMEOUT)
+
 AC_PATH_PROG([LDCONFIG], [ldconfig], :)
 AC_PATH_PROG([SHA1SUM], [sha1sum], $ac_aux_dir/build_tools/sha1sum-sh)
 AC_PATH_PROG([OPENSSL], [openssl], :)
diff --git a/makeopts.in b/makeopts.in
index a145b02e6c..c67e2f2b6e 100644
--- a/makeopts.in
+++ b/makeopts.in
@@ -28,6 +28,7 @@ WGET=@WGET@
 FETCH=@FETCH@
 DOWNLOAD=@DOWNLOAD@
 DOWNLOAD_TO_STDOUT=@DOWNLOAD_TO_STDOUT@
+DOWNLOAD_MAX_TIMEOUT=@DOWNLOAD_MAX_TIMEOUT@
 SOUNDS_CACHE_DIR=@SOUNDS_CACHE_DIR@
 EXTERNALS_CACHE_DIR=@EXTERNALS_CACHE_DIR@
 RUBBER=@RUBBER@
@@ -46,6 +47,7 @@ TAR=@TAR@
 PATCH=@PATCH@
 SED=@SED@
 NM=@NM@
+CAT=@CAT@
 
 BUILD_PLATFORM=@BUILD_PLATFORM@
 BUILD_CPU=@BUILD_CPU@
diff --git a/third-party/Makefile.rules b/third-party/Makefile.rules
index 4f804dd0e3..f8b72ba6dd 100644
--- a/third-party/Makefile.rules
+++ b/third-party/Makefile.rules
@@ -26,4 +26,8 @@ export TAR
 export PATCH
 export SED
 export NM
+export MD5
+export CAT
 export DOWNLOAD
+export DOWNLOAD_TO_STDOUT
+export DOWNLOAD_TIMEOUT
diff --git a/third-party/pjproject/Makefile b/third-party/pjproject/Makefile
index 5a4c2d1b6a..3f50a89b99 100644
--- a/third-party/pjproject/Makefile
+++ b/third-party/pjproject/Makefile
@@ -75,14 +75,31 @@ include ../Makefile.rules
 include Makefile.rules
 
 ECHO_PREFIX := $(ECHO_PREFIX) echo '[pjproject] '
+SHELL_ECHO_PREFIX := echo '[pjproject] '
 
 _all: $(TARGETS)
 
+define download_from_pjproject
+	($(SHELL_ECHO_PREFIX) Downloading $(PJPROJECT_URL)/$(@F) to $@ ;\
+	$(DOWNLOAD_TO_STDOUT) $(call DOWNLOAD_TIMEOUT,5,10) $(PJPROJECT_URL)/$(@F) > $@ &&\
+	$(SHELL_ECHO_PREFIX) Downloading $(PJPROJECT_URL)/MD5SUM to $(PJMD5SUM) &&\
+	$(DOWNLOAD_TO_STDOUT) $(call DOWNLOAD_TIMEOUT,5,10) $(PJPROJECT_URL)/MD5SUM.TXT > $(PJMD5SUM) &&\
+	($(SHELL_ECHO_PREFIX) Verifying $@ &&\
+	tarball_sum=$$($(CAT) $@ | $(MD5) | $(SED) -n -r -e "s/^([^ ]+)\s+.*/\1/gp") ;\
+	required_sum=$$($(SED) -n -r -e "s/^([^ ]+)\s+$(@F)/\1/gp" $(PJMD5SUM)) ;\
+	if [ "$$tarball_sum" != "$$required_sum" ] ; then $(SHELL_ECHO_PREFIX) Verify failed ; exit 1 ; fi) &&\
+	$(SHELL_ECHO_PREFIX) Verify successful ; exit 0)
+endef
+
+.DELETE_ON_ERROR:
+
 DOWNLOAD_DIR := $(or $(EXTERNALS_CACHE_DIR),$(TMPDIR),$(wildcard /tmp),.)
+TARBALL = $(DOWNLOAD_DIR)/pjproject-$(PJPROJECT_VERSION).tar.bz2
+PJMD5SUM = $(patsubst %.tar.bz2,%.md5,$(TARBALL))
 
-$(DOWNLOAD_DIR)/pjproject-$(PJPROJECT_VERSION).tar.bz2: ../versions.mak
-	$(ECHO_PREFIX) Downloading $(PJPROJECT_URL)/$(@F) to $@
-	$(CMD_PREFIX) $(DOWNLOAD_TO_STDOUT) $(PJPROJECT_URL)/$(@F) > $@
+$(TARBALL): ../versions.mak
+	$(CMD_PREFIX) $(download_from_pjproject) || (rm -rf $@ ;\
+	$(SHELL_ECHO_PREFIX) Retrying download ; sleep 3 ; $(download_from_pjproject))
 
 source/.unpacked: $(DOWNLOAD_DIR)/pjproject-$(PJPROJECT_VERSION).tar.bz2
 	$(ECHO_PREFIX) Unpacking $<
diff --git a/third-party/pjproject/configure.m4 b/third-party/pjproject/configure.m4
index 7c60c2a02b..8294d8ef93 100644
--- a/third-party/pjproject/configure.m4
+++ b/third-party/pjproject/configure.m4
@@ -28,8 +28,14 @@ AC_DEFUN([_PJPROJECT_CONFIGURE],
 	if test "${NM}" = ":" ; then
 		AC_MSG_ERROR(nm is required to build bundled pjproject)
 	fi
+	if test "${MD5}" = ":" ; then
+		AC_MSG_ERROR(md5sum is required to build bundled pjproject)
+	fi
+	if test "${CAT}" = ":" ; then
+		AC_MSG_ERROR(cat is required to build bundled pjproject)
+	fi
 
-	export TAR PATCH SED NM EXTERNALS_CACHE_DIR DOWNLOAD_TO_STDOUT
+	export TAR PATCH SED NM EXTERNALS_CACHE_DIR DOWNLOAD_TO_STDOUT DOWNLOAD_TIMEOUT DOWNLOAD MD5 CAT
 	${GNU_MAKE} --quiet --no-print-directory -C ${PJPROJECT_DIR} EXTERNALS_CACHE_DIR=${EXTERNALS_CACHE_DIR} configure
 	if test $? -ne 0 ; then
 		AC_MSG_RESULT(failed)