Codec Related modification

- Retrieve a codec list from a sip provider as the default cap for chan_voicemngr.
- For incoming requests, respond with only the first codec in the remote list that
  is also in the local list(remote_first) to increase stability.

net/asterisk/files/iopsys/etc/asterisk/chan_telephony.conf

@@ -47,6 +47,8 @@ dialoutmsec=|DIALOUTMSEC|
 ; Inter-digit timer open
 interdigitopenmsec=|INTERDIGITOPENMSEC|
 
+codeclist = |CODEC_LIST|
+
 ; Comfort Noise Generation
 ; 0 = CNG off
 ; 1 = White noise

net/asterisk/files/iopsys/etc/asterisk/pjsip_endpoint

@@ -8,6 +8,7 @@ from_domain = |DOMAIN|
 disallow = all
 |ALLOW|
 outgoing_call_offer_pref = local_merge
+incoming_call_offer_pref = remote_first
 outbound_auth = |NAME|
 aors = |NAME|
 transport = transport-|TRANSPORT|

net/asterisk/files/iopsys/lib/voice/config_asterisk.sh

@@ -1574,17 +1574,32 @@ configure_tel_options() {
 		sed -i "s/|PACKET_LOSS_CONCEALMENT|/yes/"			$WORK_DIR/codecs.conf
 	fi
 
-        if [ "$flash_spec" == "etsi" ]; then
-                sed -i "s/|FLASH_SPEC|/etsi/"                     $WORK_DIR/chan_telephony.conf
-        else
-                sed -i "s/|FLASH_SPEC|/uk/"                    	  $WORK_DIR/chan_telephony.conf
-        fi
+	if [ "$flash_spec" == "etsi" ]; then
+		sed -i "s/|FLASH_SPEC|/etsi/"                     $WORK_DIR/chan_telephony.conf
+	else
+		sed -i "s/|FLASH_SPEC|/uk/"                    	  $WORK_DIR/chan_telephony.conf
+	fi
+	local codec_list
+	local codec
+	local codec_to_list=""
+	config_get codec_list sip0 "codecs"
+
+	if [ -z "$codec_list" ] ; then
+		codec_to_list="alaw,ulaw\\n"
+	fi
+
+	for codec in $codec_list; do
+		[ -z "$codec" ] && continue
+		codec_to_list=$codec_to_list"$codec,"
+	done
+	sed -i "s/|CODEC_LIST|/$codec_to_list/"           			$WORK_DIR/chan_telephony.conf
 
 	if [ -n "$country" ]; then
             sed -i "s/|LANGUAGE|/$country/"        		$WORK_DIR/chan_telephony.conf
         else
             sed -i "s/|LANGUAGE|/se/"        			$WORK_DIR/chan_telephony.conf
 	fi
+
 }
 
 configure_outgoingmap()