Tag Archives: dialplan

Freeswitch PBX system

Setting up a in house hosted Enterprise PBX system for within enterprise communication .

Installation of Freeswitch on hosted server

source code

apt-get install git
git clone https://stash.freeswitch.org/scm/fs/freeswitch.git

verify installation by checking version

freeswitch -version
FreeSWITCH version: 1.9.0-742-8f1b7e0~64bit (-742-8f1b7e0 64bit)

post installation

optional arguments you can pass to freeswitch:
-nf — no forking
-reincarnate — restart the switch on an uncontrolled exit
-reincarnate-reexec — run execv on a restart (helpful for upgrades)
-u [user] — specify user to switch to
-g [group] — specify group to switch to
-core — dump cores
-help — this message
-version — print the version and exit
-rp — enable high(realtime) priority settings
-lp — enable low priority settings
-np — enable normal priority settings
-vg — run under valgrind
-nosql — disable internal sql scoreboard
-heavy-timer — Heavy Timer, possibly more accurate but at a cost
-nonat — disable auto nat detection
-nonatmap — disable auto nat port mapping
-nocal — disable clock calibration
-nort — disable clock clock_realtime
-stop — stop freeswitch
-nc — do not output to a console and background
-ncwait — do not output to a console and background but wait until the system is ready before exiting (implies -nc)
-c — output to a console and stay in the foreground

Options to control locations of files:
-base [basedir] — alternate prefix directory
-cfgname [filename] — alternate filename for FreeSWITCH main configuration file
-conf [confdir] — alternate directory for FreeSWITCH configuration files
-log [logdir] — alternate directory for logfiles
-run [rundir] — alternate directory for runtime files
-db [dbdir] — alternate directory for the internal database
-mod [moddir] — alternate directory for modules
-htdocs [htdocsdir] — alternate directory for htdocs
-scripts [scriptsdir] — alternate directory for scripts
-temp [directory] — alternate directory for temporary files
-grammar [directory] — alternate directory for grammar files
-certs [directory] — alternate directory for certificates
-recordings [directory] — alternate directory for recordings
-storage [directory] — alternate directory for voicemail storage
-cache [directory] — alternate directory for cache files
-sounds [directory] — alternate directory for sound files

Tracing SIP messages and Freeswitch processing for call from external user to internal user .Freeswitch acts as B2BUA

Receives incoming Call INVITE

recv 823 bytes from tcp/[caller_ip]:35365 at 09:55:07.936234:
   ------------------------------------------------------------------------
   INVITE sip:to_number@sometelco.com:5060 SIP/2.0
   Via: SIP/2.0/TCP 192.168.1.23:55934;branch=z9hG4bK-524287-1---cc11593581af6519;rport
   Max-Forwards: 70
   Contact: <sip:from_number@192.168.1.23:55934;transport=tcp&gt;
   To: <sip:to_number@sometelco.com:5060&gt;
   From: "from_number"<sip:from_number@sometelco.com:5060&gt;;tag=47a61272
   Call-ID: 94385YTY3ODNlNzE1YjE5MmY4NmQ3ZWUyZDAzM2E0YzBkM2I
   CSeq: 1 INVITE
   Allow: OPTIONS, SUBSCRIBE, NOTIFY, INVITE, ACK, CANCEL, BYE, REFER, INFO
   Content-Type: application/sdp
   Supported: replaces
   User-Agent: X-Lite release 5.4.0 stamp 94385
   Content-Length: 208

   v=0
   o=- 1553248503383592 1 IN IP4 192.168.1.23
   s=X-Lite release 5.4.0 stamp 94385
   c=IN IP4 192.168.1.23
   t=0 0
   m=audio 49874 RTP/AVP 8 101
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-15
   a=sendrecv
   ------------------------------------------------------------------------

checks with ACL for permission and set NAT. Isolate SDP for processing.

New Channel sofia/internal/from_number@sometelco.com:5060 [a8a2003f-5755-40fe-ab63-aab2f5264886]

Running State Change CS_NEW (Cur 1 Tot 274)
receiving invite from caller_ip:35365 version: 1.9.0 -742-8f1b7e0 64bit
IP caller_ip Approved by acl "domains[]". Access Granted.
Setting NAT mode based on nat.auto
Channel sofia/internal/from_number@sometelco.com:5060 entering state [received][100]
Remote SDP:
v=0
o=- 1553248503383592 1 IN IP4 192.168.1.23
s=X-Lite release 5.4.0 stamp 94385
c=IN IP4 192.168.1.23
t=0 0
m=audio 49874 RTP/AVP 8 101
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15

mainatin and Updates call-state (switch_core_state_machine ) CS_NEW -> CS_INIT -> CS_ROUTING -> RINGING and send 100 trying to caller

State Change CS_NEW -&gt; CS_INIT
State NEW
Running State Change CS_INIT (Cur 1 Tot 274)
State INIT
SOFIA INIT
Standard INIT
State Change CS_INIT -&gt; CS_ROUTING
State INIT going to sleep
Running State Change CS_ROUTING (Cur 1 Tot 274)
Change DOWN -&gt; RINGING
State ROUTING
send 413 bytes to tcp/[caller_ip]:35365 at 09:55:07.937474:
   ------------------------------------------------------------------------
   SIP/2.0 100 Trying
   Via: SIP/2.0/TCP 192.168.1.23:55934;branch=z9hG4bK-524287-1---cc11593581af6519;rport=35365;received=caller_ip
   From: "from_number"<sip:from_number@sometelco.com:5060&gt;;tag=47a61272
   To: <sip:to_number@sometelco.com:5060&gt;
   Call-ID: 94385YTY3ODNlNzE1YjE5MmY4NmQ3ZWUyZDAzM2E0YzBkM2I
   CSeq: 1 INVITE
   User-Agent: FreeSWITCH-mod_sofia/1.9.0-742-8f1b7e0~64bit
   Content-Length: 0

   ------------------------------------------------------------------------

checks dialplan to route incoming call. In this case action is to bridge the incoming call to internal user

mod_sofia.c:154 sofia/internal/from_number@sometelco.com:5060 SOFIA ROUTING
switch_core_state_machine.c:236 sofia/internal/from_number@sometelco.com:5060 Standard ROUTING

mod_dialplan_xml.c:637 Processing from_number <from_number&gt;-&gt;to_number in context public
Dialplan: sofia/internal/from_number@sometelco.com:5060 parsing [public-&gt;dialplan_cutsom] continue=false
Dialplan: sofia/internal/from_number@sometelco.com:5060 Regex (PASS) [dialplan_cutsom] destination_number(to_number) =~ /^(\d+)$/ break=on-false
Dialplan: sofia/internal/from_number@sometelco.com:5060 Action log(INFO ***** Forwarding calls to gateway ****** ) 
Dialplan: sofia/internal/from_number@sometelco.com:5060 Action bridge({sip_auth_username=user,sip_auth_password=pass,sip_route_uri=sip:to_number@ip_addr;transport=tls,sip_invite_req_uri=sip:to_number@sometelco.com;transport=tls}sofia/external/to_number@ip_addr) 

update call state CS_ROUTING -> CS_EXECUTE

State Change CS_ROUTING -> CS_EXECUTE
State ROUTING going to sleep
Running State Change CS_EXECUTE (Cur 1 Tot 274)
State EXECUTE
SOFIA EXECUTE

set the crypto and codecs for the new call

switch_ivr_originate.c:2159 Parsing global variables
switch_channel.c:1104 New Channel sofia/external/to_number@ip_addr [cc1ae238-9efd-4f51-93e9-05abd48bea4d]
mod_sofia.c:5026 (sofia/external/to_number@ip_addr) State Change CS_NEW -> CS_INIT
switch_core_state_machine.c:584 (sofia/external/to_number@ip_addr) Running State Change CS_INIT (Cur 2 Tot 275)
switch_core_state_machine.c:627 (sofia/external/to_number@ip_addr) State INIT
mod_sofia.c:93 sofia/external/to_number@ip_addr SOFIA INIT
Set Local audio crypto Key [1 AEAD_AES_256_GCM_8 inline:ZbEHd76sP6FZSO9AYcqryybaA4HY3O5p2Uo+e1gmmfVaZCEic6cvKyArhMU]
Set Local video crypto Key [1 AEAD_AES_256_GCM_8 inline:Ehr3LoDR8Ur+wtNAMqoqIDn3S7V2inE2/n++awxS6/1P2ijcqfk12+LM/Pc]
Set Local text crypto Key [1 AEAD_AES_256_GCM_8 inline:NVSfjOmSS5BaP/5yqg+SOXcqvEFTHHrC8R5AYkkClXLuNOXYoaUYlrIWeW0]
Set Local audio crypto Key [2 AEAD_AES_128_GCM_8 inline:ePH/F2Qw5+zi8c7tkBb6Y2AQE5uevp+jWUkjgQ]
Set Local video crypto Key [2 AEAD_AES_128_GCM_8 inline:YWdfNLSx6MqG9WQ3TmsV/cSBDqjRUAbHE0rRCg]
Set Local text crypto Key [2 AEAD_AES_128_GCM_8 inline:DFXOP2V2Ep6FoHNz5HIMrm0cu6Za8I5wOI/hUw]
Set Local audio crypto Key [3 AES_CM_256_HMAC_SHA1_80 inline:SG5rYx3GSR2imutYQ+LzqHufG9UkG3n/SfmFHFOG/r75v2pwf2lG7Qpup+J0mw]
Set Local video crypto Key [3 AES_CM_256_HMAC_SHA1_80 inline:LkU3i9MD25k2wtTfSXUvhlxo66GtMWnXkKoxSdgRZyANoeOhufYnXzbXDo+7+w]
Set Local text crypto Key [3 AES_CM_256_HMAC_SHA1_80 inline:AUgUOVmFunzotvwZ6KuMDnBRR2XKk1DsX2qg465MsT6OAxHc2qKBFpeQEpxrqA]
Set Local audio crypto Key [4 AES_CM_192_HMAC_SHA1_80 inline:2PVBBJEp4QcTzTf4Th8Ag/7KiVPmrYb/FCowiRb6yAuTO/kxQLc]
Set Local video crypto Key [4 AES_CM_192_HMAC_SHA1_80 inline:OiFbZQ6mWuf5sHJT1pFPU6EWxEvQAO/0rcp8uGMf79k7RSR3IQA]
Set Local text crypto Key [4 AES_CM_192_HMAC_SHA1_80 inline:XyednWJmzRfsWQOgdhKaMeOeE/OLmnwo6hVEZWl4OJdKdgK6TVc]
Set Local audio crypto Key [5 AES_CM_128_HMAC_SHA1_80 inline:Yd4L5Qi7A/8xay5ZHWR1jKk9j5Kvy9s2Zo3NOES2]
Set Local video crypto Key [5 AES_CM_128_HMAC_SHA1_80 inline:ImgbbD6cnhnH19O1knP5SSIUULsZTaNJJIUepxt0]
Set Local text crypto Key [5 AES_CM_128_HMAC_SHA1_80 inline:V7+IbSZmTdQNjh/upUZ5TFDSlgarhDTVfV+AcUA+]
Set Local audio crypto Key [6 AES_CM_256_HMAC_SHA1_32 inline:JI+s9uFdZ3JfZmRRfwHr0OrpyZdtUXmMC0WRIZow1EuXRB9xKFRBk6KmSWomqQ]
Set Local video crypto Key [6 AES_CM_256_HMAC_SHA1_32 inline:MX6CGCrMEioUCJsIOCxRqlHOx4mUYRw4DslpY25njZQAkH6MgG/9hp7G8xr44A]
Set Local text crypto Key [6 AES_CM_256_HMAC_SHA1_32 inline:ikCz2sYLGoMO+dlrZj+znlQ3djAkGSYzSLLu6Az8u2THWPgnkFJXVgXSxHOaHw]
Set Local audio crypto Key [7 AES_CM_192_HMAC_SHA1_32 inline:5JzlrMywFZhHuNLWPG/HBrUi/Zcg414Q7ZfSaJQnUF5N9APy+GQ]
Set Local video crypto Key [7 AES_CM_192_HMAC_SHA1_32 inline:K0dZtwH1Q7AuSMBPPUesy047c4nAF+QuFsVvGdf3fYJDOD0Uwxo]
Set Local text crypto Key [7 AES_CM_192_HMAC_SHA1_32 inline:96SwyWAdV1a+BU3UbiX1PHdkRlSS4RtmwPWNPbCR3NDm1MyBh58]
Set Local audio crypto Key [8 AES_CM_128_HMAC_SHA1_32 inline:/RLYPhZs07WCCBRY8tWNTJemT/IFq1VPHGHmGvnG]
Set Local video crypto Key [8 AES_CM_128_HMAC_SHA1_32 inline:mQlgScFq1iMKEW8vobzwhmN9TWSmVblAv9u7c1/c]
Set Local text crypto Key [8 AES_CM_128_HMAC_SHA1_32 inline:WAQveMfrQkPBcfqH2qLmuzY63VLfT+N30/YLyuqE]
Set Local audio crypto Key [9 AES_CM_128_NULL_AUTH inline:f2fx2ekxPG3GTwTYARtquNJ87qO0Q5ei47KYlo9K]
Set Local video crypto Key [9 AES_CM_128_NULL_AUTH inline:qpAkfc1bWnZ0Y/1ql+dNvhIGgxxWZoVltnRD5kqn]
Set Local text crypto Key [9 AES_CM_128_NULL_AUTH inline:LyhSlzI3X38WKPwZ83035Ddvse4J/2KnKoydo2FD]

set proxy route and create SDP for sending invite to bridged client

sofia_glue.c:1268 sip:to_number@ip_addr;transport=tls Setting proxy route to sofia/external/to_number@ip_addr
sofia_glue.c:1299 sofia/external/to_number@ip_addr sending invite version: 1.9.0 -742-8f1b7e0 64bit
Local SDP:
v=0
o=FreeSWITCH 1553228435 1553228436 IN IP4 via_addr
s=FreeSWITCH
c=IN IP4 via_addr
t=0 0
m=audio 20072 RTP/SAVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=crypto:1 AEAD_AES_256_GCM_8 inline:ZbEHd76sP6FZSO9AYcqryybaA4HY3O5p2Uo+e1gmmfVaZCEic6cvKyArhMU
a=crypto:2 AEAD_AES_128_GCM_8 inline:ePH/F2Qw5+zi8c7tkBb6Y2AQE5uevp+jWUkjgQ
a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:SG5rYx3GSR2imutYQ+LzqHufG9UkG3n/SfmFHFOG/r75v2pwf2lG7Qpup+J0mw
a=crypto:4 AES_CM_192_HMAC_SHA1_80 inline:2PVBBJEp4QcTzTf4Th8Ag/7KiVPmrYb/FCowiRb6yAuTO/kxQLc
a=crypto:5 AES_CM_128_HMAC_SHA1_80 inline:Yd4L5Qi7A/8xay5ZHWR1jKk9j5Kvy9s2Zo3NOES2
a=crypto:6 AES_CM_256_HMAC_SHA1_32 inline:JI+s9uFdZ3JfZmRRfwHr0OrpyZdtUXmMC0WRIZow1EuXRB9xKFRBk6KmSWomqQ
a=crypto:7 AES_CM_192_HMAC_SHA1_32 inline:5JzlrMywFZhHuNLWPG/HBrUi/Zcg414Q7ZfSaJQnUF5N9APy+GQ
a=crypto:8 AES_CM_128_HMAC_SHA1_32 inline:/RLYPhZs07WCCBRY8tWNTJemT/IFq1VPHGHmGvnG
a=crypto:9 AES_CM_128_NULL_AUTH inline:f2fx2ekxPG3GTwTYARtquNJ87qO0Q5ei47KYlo9K
a=ptime:20
a=sendrecv
m=audio 20072 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv

attach the SDP to INVITE and proceed forwarding INVITE to callee

send 1988 bytes to tls/[ip_addr]:5061 at 09:55:07.939831:
   ------------------------------------------------------------------------
   INVITE sip:to_number@sometelco.com;transport=tls SIP/2.0
   Via: SIP/2.0/TLS via_addr:5080;rport;branch=z9hG4bK21Qm9U3eHX0Nc
   Max-Forwards: 69
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070461 INVITE
   Contact: <sip:mod_sofia@via_addr:5080&gt;
   User-Agent: FreeSWITCH-mod_sofia/1.9.0-742-8f1b7e0~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, refer
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 1162
   X-FS-Support: update_display,send_info
   Remote-Party-ID: "from_number" <sip:from_number@via_addr&gt;;party=calling;screen=yes;privacy=off

   v=0
   o=FreeSWITCH 1553228435 1553228436 IN IP4 via_addr
   s=FreeSWITCH
   c=IN IP4 via_addr
   t=0 0
   m=audio 20072 RTP/SAVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=crypto:1 AEAD_AES_256_GCM_8 inline:ZbEHd76sP6FZSO9AYcqryybaA4HY3O5p2Uo+e1gmmfVaZCEic6cvKyArhMU
   a=crypto:2 AEAD_AES_128_GCM_8 inline:ePH/F2Qw5+zi8c7tkBb6Y2AQE5uevp+jWUkjgQ
   a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:SG5rYx3GSR2imutYQ+LzqHufG9UkG3n/SfmFHFOG/r75v2pwf2lG7Qpup+J0mw
   a=crypto:4 AES_CM_192_HMAC_SHA1_80 inline:2PVBBJEp4QcTzTf4Th8Ag/7KiVPmrYb/FCowiRb6yAuTO/kxQLc
   a=crypto:5 AES_CM_128_HMAC_SHA1_80 inline:Yd4L5Qi7A/8xay5ZHWR1jKk9j5Kvy9s2Zo3NOES2
   a=crypto:6 AES_CM_256_HMAC_SHA1_32 inline:JI+s9uFdZ3JfZmRRfwHr0OrpyZdtUXmMC0WRIZow1EuXRB9xKFRBk6KmSWomqQ
   a=crypto:7 AES_CM_192_HMAC_SHA1_32 inline:5JzlrMywFZhHuNLWPG/HBrUi/Zcg414Q7ZfSaJQnUF5N9APy+GQ
   a=crypto:8 AES_CM_128_HMAC_SHA1_32 inline:/RLYPhZs07WCCBRY8tWNTJemT/IFq1VPHGHmGvnG
   a=crypto:9 AES_CM_128_NULL_AUTH inline:f2fx2ekxPG3GTwTYARtquNJ87qO0Q5ei47KYlo9K
   a=ptime:20
   m=audio 20072 RTP/AVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=ptime:20
   ------------------------------------------------------------------------

manage and update call state for this call leg too CS_INIT -> CS_ROUTING -> CS_CONSUME_MEDIA

Standard INIT
State Change CS_INIT -&gt; CS_ROUTING
State INIT going to sleep
Running State Change CS_ROUTING (Cur 2 Tot 275)
Channel sofia/external/to_number@ip_addr entering state [calling][0]
State ROUTING
SOFIA ROUTING
State Change CS_ROUTING -&gt; CS_CONSUME_MEDIA
State ROUTING going to sleep
Running State Change CS_CONSUME_MEDIA (Cur 2 Tot 275)
State CONSUME_MEDIA
State CONSUME_MEDIA going to sleep
recv 365 bytes from tls/[ip_addr]:5061 at 09:55:07.940977:
   ------------------------------------------------------------------------
   SIP/2.0 100 trying -- your call is important to us
   Via: SIP/2.0/TLS via_addr:5080;rport=59774;branch=z9hG4bK21Qm9U3eHX0Nc;received=via_addr
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070461 INVITE
   Server: ZenTrunk
   Content-Length: 0

   ------------------------------------------------------------------------

Callee from PBX throws auth challenge

recv 483 bytes from tls/[ip_addr]:5061 at 09:55:08.046934:
   ------------------------------------------------------------------------
   SIP/2.0 407 Proxy Authentication Required
   Via: SIP/2.0/TLS via_addr:5080;received=via_addr;rport=59774;branch=z9hG4bK21Qm9U3eHX0Nc
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;;tag=f1cff938000510c1d9006e5a2a4e240b-5736
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070461 INVITE
   Proxy-Authenticate: Digest realm="domain.com", nonce="XJSyI1yUsPf0w1bAocvH4IOCayfWt3bX", qop="auth"
   Content-Length: 0

   ------------------------------------------------------------------------
send 387 bytes to tls/[ip_addr]:5061 at 09:55:08.047056:
   ------------------------------------------------------------------------
   ACK sip:to_number@sometelco.com;transport=tls SIP/2.0
   Via: SIP/2.0/TLS via_addr:5080;rport;branch=z9hG4bK21Qm9U3eHX0Nc
   Max-Forwards: 69
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;;tag=f1cff938000510c1d9006e5a2a4e240b-5736
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070461 ACK
   Content-Length: 0

   ------------------------------------------------------------------------

calleer sends re-invit with auth details

Authenticating 'altanai' with 'Digest:"doamin.com":altanai:pass'.
send 2273 bytes to tls/[ip_addr]:5061 at 09:55:08.047387:
   ------------------------------------------------------------------------
   INVITE sip:to_number@sometelco.com;transport=tls SIP/2.0
   Via: SIP/2.0/TLS via_addr:5080;rport;branch=z9hG4bK3aHDBQmje6p8Q
   Max-Forwards: 69
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070462 INVITE
   Contact: <sip:mod_sofia@via_addr:5080&gt;
   User-Agent: FreeSWITCH-mod_sofia/1.9.0-742-8f1b7e0~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, refer
   Proxy-Authorization: Digest username="altanai", realm="domain.com", nonce="XJSyI1yUsPf0w1bAocvH4IOCayfWt3bX", cnonce="apLWcMcrEjerigKpM7MtoA", algorithm=MD5, uri="sip:to_number@sometelco.com;transport=tls", response="0044b00a4d5026252b32eed619d70f9d", qop=auth, nc=00000001
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 1162
   X-FS-Support: update_display,send_info
   Remote-Party-ID: "from_number" <sip:from_number@via_addr&gt;;party=calling;screen=yes;privacy=off

   v=0
   o=FreeSWITCH 1553228435 1553228436 IN IP4 via_addr
   s=FreeSWITCH
   c=IN IP4 via_addr
   t=0 0
   m=audio 20072 RTP/SAVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=crypto:1 AEAD_AES_256_GCM_8 inline:ZbEHd76sP6FZSO9AYcqryybaA4HY3O5p2Uo+e1gmmfVaZCEic6cvKyArhMU
   a=crypto:2 AEAD_AES_128_GCM_8 inline:ePH/F2Qw5+zi8c7tkBb6Y2AQE5uevp+jWUkjgQ
   a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:SG5rYx3GSR2imutYQ+LzqHufG9UkG3n/SfmFHFOG/r75v2pwf2lG7Qpup+J0mw
   a=crypto:4 AES_CM_192_HMAC_SHA1_80 inline:2PVBBJEp4QcTzTf4Th8Ag/7KiVPmrYb/FCowiRb6yAuTO/kxQLc
   a=crypto:5 AES_CM_128_HMAC_SHA1_80 inline:Yd4L5Qi7A/8xay5ZHWR1jKk9j5Kvy9s2Zo3NOES2
   a=crypto:6 AES_CM_256_HMAC_SHA1_32 inline:JI+s9uFdZ3JfZmRRfwHr0OrpyZdtUXmMC0WRIZow1EuXRB9xKFRBk6KmSWomqQ
   a=crypto:7 AES_CM_192_HMAC_SHA1_32 inline:5JzlrMywFZhHuNLWPG/HBrUi/Zcg414Q7ZfSaJQnUF5N9APy+GQ
   a=crypto:8 AES_CM_128_HMAC_SHA1_32 inline:/RLYPhZs07WCCBRY8tWNTJemT/IFq1VPHGHmGvnG
   a=crypto:9 AES_CM_128_NULL_AUTH inline:f2fx2ekxPG3GTwTYARtquNJ87qO0Q5ei47KYlo9K
   a=ptime:20
   m=audio 20072 RTP/AVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=ptime:20
   ------------------------------------------------------------------------
2019-03-22 09:55:08.041945 [DEBUG] sofia.c:7291 Channel sofia/external/to_number@ip_addr entering state [calling][0]
recv 365 bytes from tls/[ip_addr]:5061 at 09:55:08.048255:
   ------------------------------------------------------------------------
   SIP/2.0 100 trying -- your call is important to us
   Via: SIP/2.0/TLS via_addr:5080;rport=59774;branch=z9hG4bK3aHDBQmje6p8Q;received=via_addr
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070462 INVITE
   Server: ZenTrunk
   Content-Length: 0

   ------------------------------------------------------------------------

Call is accepted by callee , 200 OK is received by Freeswitch PBX

recv 1451 bytes from tls/[ip_addr]:5061 at 09:55:14.223460:
   ------------------------------------------------------------------------
   SIP/2.0 200 OK
   Via: SIP/2.0/TLS via_addr:5080;received=via_addr;rport=59774;branch=z9hG4bK3aHDBQmje6p8Q
   Record-Route: <sip:3.92.18.95:5060;lr;ftag=8jByBXa2pF1Fj&gt;
   Record-Route: <sip:18.205.1.67;lr;ftag=8jByBXa2pF1Fj;did=fd.0971&gt;
   Record-Route: <sip:ip_addr:5060;r2=on;lr;ftag=8jByBXa2pF1Fj;nat=yes&gt;
   Record-Route: <sip:ip_addr:5061;transport=tls;r2=on;lr;ftag=8jByBXa2pF1Fj;nat=yes&gt;
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;;tag=D0r5K6pp80Ujm
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070462 INVITE
   Contact: <sip:to_number@34.201.27.78:5080;transport=udp&gt;
   User-Agent: FreeSWITCH-mod_sofia/1.9.0-742-8f1b7e0~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, refer
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 380
   Remote-Party-ID: "to_number" <sip:to_number@34.201.27.78&gt;;party=calling;privacy=off;screen=no

   v=0
   o=FreeSWITCH 1553215954 1553215955 IN IP4 18.212.123.47
   s=FreeSWITCH
   c=IN IP4 18.212.123.47
   t=0 0
   m=audio 33516 RTP/SAVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=sendrecv
   a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==
   a=ptime:20
   m=audio 0 RTP/SAVP 19
   a=rtpmap:19 
   ------------------------------------------------------------------------

send ACK to callee

Update Callee ID to "to_number" <to_number&gt;
Channel sofia/external/to_number@ip_addr entering state [completing][200]
sofia.c:7301 Remote SDP:
v=0
o=FreeSWITCH 1553215954 1553215955 IN IP4 18.212.123.47
s=FreeSWITCH
c=IN IP4 18.212.123.47
t=0 0
m=audio 33516 RTP/SAVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=crypto:3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==
a=ptime:20
m=audio 0 RTP/SAVP 19

send 953 bytes to tls/[ip_addr]:5061 at 09:55:14.224320:
   ------------------------------------------------------------------------
   ACK sip:to_number@34.201.27.78:5080;transport=udp SIP/2.0
   Via: SIP/2.0/TLS via_addr:5080;rport;branch=z9hG4bK4Ka6cj5NBFDUK
   Route: <sip:ip_addr:5061;transport=tls;r2=on;lr;ftag=8jByBXa2pF1Fj;nat=yes&gt;
   Route: <sip:ip_addr:5060;r2=on;lr;ftag=8jByBXa2pF1Fj;nat=yes&gt;
   Route: <sip:18.205.1.67;lr;ftag=8jByBXa2pF1Fj;did=fd.0971&gt;
   Route: <sip:3.92.18.95:5060;lr;ftag=8jByBXa2pF1Fj&gt;
   Max-Forwards: 70
   From: "from_number" <sip:from_number@via_addr&gt;;tag=8jByBXa2pF1Fj
   To: <sip:to_number@ip_addr&gt;;tag=D0r5K6pp80Ujm
   Call-ID: 6a827514-c72b-1237-8aab-02a933b32da0
   CSeq: 2070462 ACK
   Contact: <sip:mod_sofia@via_addr:5080&gt;
   Proxy-Authorization: Digest username="altanai", realm="domain.com", nonce="XJSyI1yUsPf0w1bAocvH4IOCayfWt3bX", cnonce="apLWcMcrEjerigKpM7MtoA", algorithm=MD5, uri="sip:to_number@sometelco.com;transport=tls", response="0044b00a4d5026252b32eed619d70f9d", qop=auth, nc=00000001
   Content-Length: 0

   ------------------------------------------------------------------------

set audio codecs, update call state CS_CONSUME_MEDIA -> CS_EXCHANGE_MEDIA

entering state [ready][200]
looking for crypto suite [AEAD_AES_256_GCM_8] in [3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==]
looking for crypto suite [AEAD_AES_128_GCM_8] in [3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==]
looking for crypto suite [AES_CM_256_HMAC_SHA1_80] in [3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==]
Found suite AES_CM_256_HMAC_SHA1_80
Set Remote Key [3 AES_CM_256_HMAC_SHA1_80 inline:/itE1k5BLMoTNzo7YEv6hCyM6R6wyHem3Coc5jjYVlKR2L3tEzBG5zx1QHgVSg==]
Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1]
Audio Codec Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match
Set telephone-event payload to 101@8000
Set Codec sofia/external/to_number@ip_addr PCMA/8000 20 ms 160 samples 64000 bits 1 channels
sofia/external/to_number@ip_addr Original read codec set to PCMA:8
Set telephone-event payload to 101@8000
sofia/external/to_number@ip_addr Set 2833 dtmf send payload to 101 recv payload to 101
AUDIO RTP [sofia/external/to_number@ip_addr] 10.130.74.15 port 20072 -> 18.212.123.47 port 33516 codec: 8 ms: 20
Starting timer [soft] 160 bytes per 20ms
Set 2833 dtmf send payload to 101
Set 2833 dtmf receive payload to 101
Set rtp dtmf delay to 40
Activating audio Secure RTP SEND
srtp:sdes:AES_CM_256_HMAC_SHA1_80
Activating audio Secure RTP RECV
srtp:sdes:AES_CM_256_HMAC_SHA1_80
has been answered
Callstate Change DOWN -> ACTIVE
Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMU:0:8000:20:64000:1]
Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1]
Audio Codec Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match
Set telephone-event payload to 101@8000
Set Codec sofia/internal/from_number@sometelco.com:5060 PCMA/8000 20 ms 160 samples 64000 bits 1 channels
sofia/internal/from_number@sometelco.com:5060 Original read codec set to PCMA:8
Set telephone-event payload to 101@8000
sofia/internal/from_number@sometelco.com:5060 Set 2833 dtmf send payload to 101 recv payload to 101
AUDIO RTP [sofia/internal/from_number@sometelco.com:5060] 10.130.74.15 port 29426 -> 192.168.1.23 port 49874 codec: 8 ms: 20
Starting timer [soft] 160 bytes per 20ms
Set 2833 dtmf send payload to 101
Set 2833 dtmf receive payload to 101
Set rtp dtmf delay to 40

send early media/ RTP to Callee

 Pre-Answer sofia/internal/from_number@sometelco.com:5060!
 Callstate Change RINGING -> EARLY
 2019-03-22 09:55:14.221933 [DEBUG] switch_core_media.c:8147 Audio params are unchanged for sofia/internal/from_number@sometelco.com:5060.
 2019-03-22 09:55:14.221933 [DEBUG] mod_sofia.c:881 Local SDP sofia/internal/from_number@sometelco.com:5060:
 v=0
 o=FreeSWITCH 1553219088 1553219089 IN IP4 via_addr
 s=FreeSWITCH
 c=IN IP4 via_addr
 t=0 0
 m=audio 29426 RTP/AVP 8 101
 a=rtpmap:8 PCMA/8000
 a=rtpmap:101 telephone-event/8000
 a=fmtp:101 0-16
 a=ptime:20
 a=sendrecv
Pre-Answer sofia/internal/from_number@sometelco.com:5060!
Callstate Change RINGING -&gt; EARLY
2019-03-22 09:55:14.221933 [DEBUG] switch_core_media.c:8147 Audio params are unchanged for sofia/internal/from_number@sometelco.com:5060.
2019-03-22 09:55:14.221933 [DEBUG] mod_sofia.c:881 Local SDP sofia/internal/from_number@sometelco.com:5060:
v=0
o=FreeSWITCH 1553219088 1553219089 IN IP4 via_addr
s=FreeSWITCH
c=IN IP4 via_addr
t=0 0
m=audio 29426 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv

send 1254 bytes to tcp/[caller_ip]:35365 at 09:55:14.232934:
   ------------------------------------------------------------------------
   SIP/2.0 200 OK
   Via: SIP/2.0/TCP 192.168.1.23:55934;branch=z9hG4bK-524287-1---cc11593581af6519;rport=35365;received=caller_ip
   From: "from_number"<sip:from_number@sometelco.com:5060&gt;;tag=47a61272
   To: <sip:to_number@sometelco.com:5060&gt;;tag=NjvKFKQaHp52e
   Call-ID: 94385YTY3ODNlNzE1YjE5MmY4NmQ3ZWUyZDAzM2E0YzBkM2I
   CSeq: 1 INVITE
   Contact: <sip:to_number@via_addr:5060;transport=tcp&gt;
   User-Agent: FreeSWITCH-mod_sofia/1.9.0-742-8f1b7e0~64bit
   Accept: application/sdp
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
   Session-Expires: 120;refresher=uas
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 220
   Remote-Party-ID: "to_number" <sip:to_number@sometelco.com&gt;;party=calling;privacy=off;screen=no

   v=0
   o=FreeSWITCH 1553219088 1553219089 IN IP4 via_addr
   s=FreeSWITCH
   c=IN IP4 via_addr
   t=0 0
   m=audio 29426 RTP/AVP 8 101
   a=rtpmap:8 PCMA/8000
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=ptime:20
   ------------------------------------------------------------------------
entering state [completed][200]
Channel [sofia/internal/from_number@sometelco.com:5060] has been answered
Callstate Change EARLY -&gt; ACTIVE
Originate Resulted in Success: [sofia/external/to_number@ip_addr]
State Change CS_CONSUME_MEDIA -&gt; CS_EXCHANGE_MEDIA
Running State Change CS_EXCHANGE_MEDIA (Cur 2 Tot 275)
State EXCHANGE_MEDIA
SOFIA EXCHANGE_MEDIA
recv 507 bytes from tcp/[caller_ip]:35365 at 09:55:14.459247:
   ------------------------------------------------------------------------
   ACK sip:to_number@via_addr:5060;transport=tcp SIP/2.0
   Via: SIP/2.0/TCP 192.168.1.23:55934;branch=z9hG4bK-524287-1---104aee5ed0b7ca66;rport
   Max-Forwards: 70
   Contact: <sip:from_number@192.168.1.23:55934;transport=tcp&gt;
   To: <sip:to_number@sometelco.com:5060&gt;;tag=NjvKFKQaHp52e
   From: "from_number"<sip:from_number@sometelco.com:5060&gt;;tag=47a61272
   Call-ID: 94385YTY3ODNlNzE1YjE5MmY4NmQ3ZWUyZDAzM2E0YzBkM2I
   CSeq: 1 ACK
   User-Agent: X-Lite release 5.4.0 stamp 94385
   Content-Length: 0

   ------------------------------------------------------------------------
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