قطع ارتباط با gateway

[SAEEDPERSA]

عرض سلام و خداقوت به همه دوستاران voip
من هم gateway و هم elastix هردو ادرس ای پی ولید دارن و پشت nat قرار دارن
یکیش توی یه شهره و دیگری توی یه شهر دیگه
ساختار ارتباطیم برقرار شده ولی متاسفانه بعد از اینکه زنگ خورده میشه یا زنگ میزنم به محص اینکه تلفن رو جواب میدم تلفن بعد از 3 ثانیه hangup میشه.
;کانفیگ trunk:
externhost=x.143.225.89
port=5060
nat=force_rport,comedia
externrefresh=1200
localnet=172.16.125.0/255.255.0.0
type=peer
qualify=yes
username=newrock
secret=newrock
canreinvite=no
insecure=port,invite
dtmfmode=rfc2833

مانیتور محیط cli:

  == Using SIP RTP TOS bits 184
  == Using SIP RTP CoS mark 5
    -- Executing [777@from-trunk-sip-newrock:1] Set("SIP/newrock-00000027", "GROUP()=OUT_2") in new stack
    -- Executing [777@from-trunk-sip-newrock:2] Goto("SIP/newrock-00000027", "from-trunk,777,1") in new stack
    -- Goto (from-trunk,777,1)
    -- Executing [777@from-trunk:1] Set("SIP/newrock-00000027", "__FROM_DID=777") in new stack
    -- Executing [777@from-trunk:2] Gosub("SIP/newrock-00000027", "app-blacklist-check,s,1()") in new stack
    -- Executing [s@app-blacklist-check:1] GotoIf("SIP/newrock-00000027", "0?blacklisted") in new stack
    -- Executing [s@app-blacklist-check:2] Set("SIP/newrock-00000027", "CALLED_BLACKLIST=1") in new stack
    -- Executing [s@app-blacklist-check:3] Return("SIP/newrock-00000027", "") in new stack
    -- Executing [777@from-trunk:3] Set("SIP/newrock-00000027", "CDR(did)=777") in new stack
    -- Executing [777@from-trunk:4] ExecIf("SIP/newrock-00000027", "0 ?Set(CALLERID(name)=52237000)") in new stack
    -- Executing [777@from-trunk:5] Set("SIP/newrock-00000027", "CHANNEL(musicclass)=default") in new stack
    -- Executing [777@from-trunk:6] Set("SIP/newrock-00000027", "__MOHCLASS=default") in new stack
    -- Executing [777@from-trunk:7] Set("SIP/newrock-00000027", "__CALLINGPRES_SV=allowed_not_screened") in new stack
    -- Executing [777@from-trunk:8] Set("SIP/newrock-00000027", "CALLERPRES()=allowed_not_screened") in new stack
    -- Executing [777@from-trunk:9] Goto("SIP/newrock-00000027", "ivr-5,s,1") in new stack
    -- Goto (ivr-5,s,1)
    -- Executing [s@ivr-5:1] Set("SIP/newrock-00000027", "TIMEOUT_LOOPCOUNT=0") in new stack
    -- Executing [s@ivr-5:2] Set("SIP/newrock-00000027", "INVALID_LOOPCOUNT=0") in new stack
    -- Executing [s@ivr-5:3] Set("SIP/newrock-00000027", "_IVR_CONTEXT_ivr-5=") in new stack
    -- Executing [s@ivr-5:4] Set("SIP/newrock-00000027", "_IVR_CONTEXT=ivr-5") in new stack
    -- Executing [s@ivr-5:5] Set("SIP/newrock-00000027", "__IVR_RETVM=") in new stack
    -- Executing [s@ivr-5:6] GotoIf("SIP/newrock-00000027", "0?skip") in new stack
    -- Executing [s@ivr-5:7] Answer("SIP/newrock-00000027", "") in new stack
    -- Executing [s@ivr-5:8] Wait("SIP/newrock-00000027", "1") in new stack
    -- Executing [s@ivr-5:9] Set("SIP/newrock-00000027", "IVR_MSG=custom/payampersa-vitrin-welcome") in new stack
    -- Executing [s@ivr-5:10] Set("SIP/newrock-00000027", "TIMEOUT(digit)=3") in new stack
    -- Digit timeout set to 3.000
    -- Executing [s@ivr-5:11] ExecIf("SIP/newrock-00000027", "1?Background(custom/payampersa-vitrin-welcome)") in new stack
[2017-04-22 08:54:02] WARNING[29406][C-0000005f]: mp3/interface.c:217 decodeMP3: Junk at the beginning of frame 49443303
    -- <SIP/newrock-00000027> Playing 'custom/payampersa-vitrin-welcome.slin' (language 'en')
[2017-04-22 08:54:07] WARNING[1279]: chan_sip.c:4024 retrans_pkt: Retransmission timeout reached on transmission 14928350401945269762-0@172.16.125.5 for seqno 100020 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 6400ms with no response
[2017-04-22 08:54:07] WARNING[1279]: chan_sip.c:4053 retrans_pkt: Hanging up call 14928350401945269762-0@172.16.125.5 - no reply to our critical packet (see https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions).
  == Spawn extension (ivr-5, s, 11) exited non-zero on 'SIP/newrock-00000027'
    -- Executing [h@ivr-5:1] Hangup("SIP/newrock-00000027", "") in new stack
  == Spawn extension (ivr-5, h, 1) exited non-zero on 'SIP/newrock-00000027'
elastix*CLI>
Disconnected from Asterisk server
Asterisk cleanly ending (0).
Executing last minute cleanups