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call from 109 @ 172.25.59.198 to 104 @ 172.25.59.229

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Aug 16th, 2019
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  1. call from 109 @ 172.25.59.198 to 104 @ 172.25.59.229
  2. [root@freepbx ~]# tcpdump -i eth2 host 172.25.59.229 or 172.25.59.198 and port 5060 -v
  3. tcpdump: listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes
  4. 17:15:26.119807 IP (tos 0x68, ttl 64, id 42516, offset 0, flags [none], proto UDP (17), length 1273)
  5. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 1245
  6. INVITE sip:104@172.25.59.164 SIP/2.0
  7. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1304215592;rport
  8. Route: <sip:172.25.59.164:5060;lr>
  9. From: "109" <sip:109@172.25.59.164>;tag=793769793
  10. To: <sip:104@172.25.59.164>
  11. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  12. CSeq: 450 INVITE
  13. Contact: "109" <sip:109@172.25.59.198:16692>
  14. X-Grandstream-PBX: true
  15. Max-Forwards: 70
  16. User-Agent: Grandstream GXP1628 1.0.4.55
  17. Privacy: none
  18. P-Preferred-Identity: "109" <sip:109@172.25.59.164>
  19. P-Access-Network-Info: IEEE-EUI-48;eui-48-addr=00-08-A2-0F-7D-9E
  20. P-Emergency-Info: IEEE-EUI-48;eui-48-addr=00-0B-82-9F-45-5C
  21. Supported: replaces, path, timer
  22. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  23. Content-Type: application/sdp
  24. Accept: application/sdp, application/dtmf-relay
  25. Content-Length: 404
  26.  
  27. v=0
  28. o=109 8000 8000 IN IP4 172.25.59.198
  29. s=SIP Call
  30. c=IN IP4 172.25.59.198
  31. t=0 0
  32. m=audio 50960 RTP/AVP 0 8 4 18 9 97 2 101
  33. a=sendrecv
  34. a=rtpmap:0 PCMU/8000
  35. a=ptime:20
  36. a=rtpmap:8 PCMA/8000
  37. a=rtpmap:4 G723/8000
  38. a=rtpmap:18 G729/8000
  39. a=fmtp:18 annexb=no
  40. a=rtpmap:9 G722/8000
  41. a=rtpmap:97 iLBC/8000
  42. a=fmtp:97 mode=30
  43. a=rtpmap:2 G726-32/8000
  44. a=rtpmap:101 telephone-event/8000
  45. a=fmtp:101 0-15
  46.  
  47. 17:15:26.120647 IP (tos 0x60, ttl 64, id 33846, offset 0, flags [none], proto UDP (17), length 558)
  48. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 530
  49. SIP/2.0 401 Unauthorized
  50. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1304215592;received=172.25.59.198;rport=16692
  51. From: "109" <sip:109@172.25.59.164>;tag=793769793
  52. To: <sip:104@172.25.59.164>;tag=as5ab12944
  53. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  54. CSeq: 450 INVITE
  55. Server: FPBX-13.0.197(13.23.1)
  56. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  57. Supported: replaces, timer
  58. WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="5002feeb"
  59. Content-Length: 0
  60.  
  61.  
  62. 17:15:26.140785 IP (tos 0x68, ttl 64, id 42517, offset 0, flags [none], proto UDP (17), length 343)
  63. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 315
  64. ACK sip:104@172.25.59.164 SIP/2.0
  65. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1304215592;rport
  66. Route: <sip:172.25.59.164:5060;lr>
  67. From: "109" <sip:109@172.25.59.164>;tag=793769793
  68. To: <sip:104@172.25.59.164>;tag=as5ab12944
  69. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  70. CSeq: 450 ACK
  71. Content-Length: 0
  72.  
  73.  
  74. 17:15:26.152181 IP (tos 0x68, ttl 64, id 42518, offset 0, flags [none], proto UDP (17), length 1436)
  75. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 1408
  76. INVITE sip:104@172.25.59.164 SIP/2.0
  77. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1195671337;rport
  78. Route: <sip:172.25.59.164:5060;lr>
  79. From: "109" <sip:109@172.25.59.164>;tag=793769793
  80. To: <sip:104@172.25.59.164>
  81. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  82. CSeq: 451 INVITE
  83. Contact: "109" <sip:109@172.25.59.198:16692>
  84. Authorization: Digest username="109", realm="asterisk", nonce="5002feeb", uri="sip:104@172.25.59.164", response="32c4917d6d95d54aadd8a3a181bc225a", algorithm=MD5
  85. X-Grandstream-PBX: true
  86. Max-Forwards: 70
  87. User-Agent: Grandstream GXP1628 1.0.4.55
  88. Privacy: none
  89. P-Preferred-Identity: "109" <sip:109@172.25.59.164>
  90. P-Access-Network-Info: IEEE-EUI-48;eui-48-addr=00-08-A2-0F-7D-9E
  91. P-Emergency-Info: IEEE-EUI-48;eui-48-addr=00-0B-82-9F-45-5C
  92. Supported: replaces, path, timer
  93. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  94. Content-Type: application/sdp
  95. Accept: application/sdp, application/dtmf-relay
  96. Content-Length: 404
  97.  
  98. v=0
  99. o=109 8000 8000 IN IP4 172.25.59.198
  100. s=SIP Call
  101. c=IN IP4 172.25.59.198
  102. t=0 0
  103. m=audio 50960 RTP/AVP 0 8 4 18 9 97 2 101
  104. a=sendrecv
  105. a=rtpmap:0 PCMU/8000
  106. a=ptime:20
  107. a=rtpmap:8 PCMA/8000
  108. a=rtpmap:4 G723/8000
  109. a=rtpmap:18 G729/8000
  110. a=fmtp:18 annexb=no
  111. a=rtpmap:9 G722/8000
  112. a=rtpmap:97 iLBC/8000
  113. a=fmtp:97 mode=30
  114. a=rtpmap:2 G726-32/8000
  115. a=rtpmap:101 telephone-event/8000
  116. a=fmtp:101 0-15
  117.  
  118. 17:15:26.160748 IP (tos 0x60, ttl 64, id 1461, offset 0, flags [none], proto UDP (17), length 698)
  119. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 670
  120. NOTIFY sip:104@172.25.59.229:59066 SIP/2.0
  121. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1310a71c;rport
  122. Max-Forwards: 70
  123. From: <sip:109@172.25.59.164>;tag=as03638f86
  124. To: <sip:104@172.25.59.164>;tag=2047173811
  125. Contact: <sip:109@172.25.59.164:5060>
  126. Call-ID: 1366929487-59066-222@BHC.CF.FJ.CCJ
  127. CSeq: 853 NOTIFY
  128. User-Agent: FPBX-13.0.197(13.23.1)
  129. Subscription-State: active
  130. Event: dialog
  131. Content-Type: application/dialog-info+xml
  132. Content-Length: 205
  133.  
  134. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="751" state="full" entity="sip:109@172.25.59.164">\0x0a<dialog id="109">\0x0a<state>confirmed</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  135. 17:15:26.161608 IP (tos 0x60, ttl 64, id 33847, offset 0, flags [none], proto UDP (17), length 537)
  136. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 509
  137. SIP/2.0 100 Trying
  138. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1195671337;received=172.25.59.198;rport=16692
  139. From: "109" <sip:109@172.25.59.164>;tag=793769793
  140. To: <sip:104@172.25.59.164>
  141. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  142. CSeq: 451 INVITE
  143. Server: FPBX-13.0.197(13.23.1)
  144. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  145. Supported: replaces, timer
  146. Session-Expires: 1800;refresher=uas
  147. Contact: <sip:104@172.25.59.164:5060>
  148. Content-Length: 0
  149.  
  150.  
  151. 17:15:26.161718 IP (tos 0x60, ttl 64, id 33848, offset 0, flags [none], proto UDP (17), length 694)
  152. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 666
  153. NOTIFY sip:109@172.25.59.198:16692 SIP/2.0
  154. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1563a7ba;rport
  155. Max-Forwards: 70
  156. From: <sip:109@172.25.59.164>;tag=as24c42f0a
  157. To: <sip:109@172.25.59.164>;tag=217921608
  158. Contact: <sip:109@172.25.59.164:5060>
  159. Call-ID: 823747092-16692-7@BHC.CF.FJ.BJI
  160. CSeq: 850 NOTIFY
  161. User-Agent: FPBX-13.0.197(13.23.1)
  162. Subscription-State: active
  163. Event: dialog
  164. Content-Type: application/dialog-info+xml
  165. Content-Length: 205
  166.  
  167. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="748" state="full" entity="sip:109@172.25.59.164">\0x0a<dialog id="109">\0x0a<state>confirmed</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  168. 17:15:26.171687 IP (tos 0x30, ttl 64, id 40311, offset 0, flags [none], proto UDP (17), length 496)
  169. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 468
  170. SIP/2.0 200 OK
  171. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1310a71c;rport=5060
  172. From: <sip:109@172.25.59.164>;tag=as03638f86
  173. To: <sip:104@172.25.59.164>;tag=2047173811
  174. Call-ID: 1366929487-59066-222@BHC.CF.FJ.CCJ
  175. CSeq: 853 NOTIFY
  176. Contact: <sip:104@172.25.59.229:59066>
  177. Supported: replaces, path, timer
  178. User-Agent: Grandstream GXP1628 1.0.4.17
  179. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  180. Content-Length: 0
  181.  
  182.  
  183. 17:15:26.181299 IP (tos 0x68, ttl 64, id 42519, offset 0, flags [none], proto UDP (17), length 492)
  184. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 464
  185. SIP/2.0 200 OK
  186. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1563a7ba;rport=5060
  187. From: <sip:109@172.25.59.164>;tag=as24c42f0a
  188. To: <sip:109@172.25.59.164>;tag=217921608
  189. Call-ID: 823747092-16692-7@BHC.CF.FJ.BJI
  190. CSeq: 850 NOTIFY
  191. Contact: <sip:109@172.25.59.198:16692>
  192. Supported: replaces, path, timer
  193. User-Agent: Grandstream GXP1628 1.0.4.55
  194. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  195. Content-Length: 0
  196.  
  197.  
  198. 17:15:26.261545 IP (tos 0x60, ttl 64, id 33849, offset 0, flags [none], proto UDP (17), length 584)
  199. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 556
  200. OPTIONS sip:109@172.25.59.198:16692 SIP/2.0
  201. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3ff7e26e
  202. Max-Forwards: 70
  203. From: "Unknown" <sip:Unknown@172.25.59.164>;tag=as7ae9b43f
  204. To: <sip:109@172.25.59.198:16692>
  205. Contact: <sip:Unknown@172.25.59.164:5060>
  206. Call-ID: 4683bc90633f81020941043105ef2704@172.25.59.164:5060
  207. CSeq: 102 OPTIONS
  208. User-Agent: FPBX-13.0.197(13.23.1)
  209. Date: Thu, 15 Aug 2019 21:15:26 GMT
  210. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  211. Supported: replaces, timer
  212. Content-Length: 0
  213.  
  214.  
  215. 17:15:26.268015 IP (tos 0x68, ttl 64, id 42520, offset 0, flags [none], proto UDP (17), length 483)
  216. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 455
  217. SIP/2.0 200 OK
  218. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3ff7e26e
  219. From: "Unknown" <sip:Unknown@172.25.59.164>;tag=as7ae9b43f
  220. To: <sip:109@172.25.59.198:16692>;tag=1256713357
  221. Call-ID: 4683bc90633f81020941043105ef2704@172.25.59.164:5060
  222. CSeq: 102 OPTIONS
  223. Supported: replaces, path, timer
  224. User-Agent: Grandstream GXP1628 1.0.4.55
  225. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  226. Content-Length: 0
  227.  
  228.  
  229. 17:15:26.426970 IP (tos 0x60, ttl 64, id 1462, offset 0, flags [none], proto UDP (17), length 985)
  230. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  231. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  232. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  233. Max-Forwards: 70
  234. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  235. To: <sip:104@172.25.59.229:59066>
  236. Contact: <sip:109@172.25.59.164:5060>
  237. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  238. CSeq: 102 INVITE
  239. User-Agent: FPBX-13.0.197(13.23.1)
  240. Date: Thu, 15 Aug 2019 21:15:26 GMT
  241. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  242. Supported: replaces, timer
  243. Alert-Info: <http://127.0.0.1>;info=;info=internal
  244. Content-Type: application/sdp
  245. Content-Length: 330
  246.  
  247. v=0
  248. o=root 678619286 678619286 IN IP4 172.25.59.164
  249. s=Asterisk PBX 13.23.1
  250. c=IN IP4 172.25.59.164
  251. t=0 0
  252. m=audio 17626 RTP/AVP 0 8 3 111 101
  253. a=rtpmap:0 PCMU/8000
  254. a=rtpmap:8 PCMA/8000
  255. a=rtpmap:3 GSM/8000
  256. a=rtpmap:111 G726-32/8000
  257. a=rtpmap:101 telephone-event/8000
  258. a=fmtp:101 0-16
  259. a=ptime:20
  260. a=maxptime:150
  261. a=sendrecv
  262.  
  263. 17:15:26.428468 IP (tos 0x60, ttl 64, id 33850, offset 0, flags [none], proto UDP (17), length 605)
  264. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 577
  265. SIP/2.0 180 Ringing
  266. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1195671337;received=172.25.59.198;rport=16692
  267. From: "109" <sip:109@172.25.59.164>;tag=793769793
  268. To: <sip:104@172.25.59.164>;tag=as40d2049d
  269. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  270. CSeq: 451 INVITE
  271. Server: FPBX-13.0.197(13.23.1)
  272. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  273. Supported: replaces, timer
  274. Session-Expires: 1800;refresher=uas
  275. Contact: <sip:104@172.25.59.164:5060>
  276. P-Asserted-Identity: "104" <sip:104@172.25.59.164>
  277. Content-Length: 0
  278.  
  279.  
  280. 17:15:26.433096 IP (tos 0x60, ttl 64, id 1463, offset 0, flags [none], proto UDP (17), length 715)
  281. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 687
  282. NOTIFY sip:104@172.25.59.229:59066 SIP/2.0
  283. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK0c1e3bdc;rport
  284. Max-Forwards: 70
  285. From: <sip:104@172.25.59.164>;tag=as624a00cb
  286. To: <sip:104@172.25.59.164>;tag=750432846
  287. Contact: <sip:104@172.25.59.164:5060>
  288. Call-ID: 848781887-59066-225@BHC.CF.FJ.CCJ
  289. CSeq: 1018 NOTIFY
  290. User-Agent: FPBX-13.0.197(13.23.1)
  291. Subscription-State: active
  292. Event: dialog
  293. Content-Type: application/dialog-info+xml
  294. Content-Length: 223
  295.  
  296. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="916" state="full" entity="sip:104@172.25.59.164">\0x0a<dialog id="104" direction="recipient">\0x0a<state>early</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  297. 17:15:26.434058 IP (tos 0x60, ttl 64, id 33851, offset 0, flags [none], proto UDP (17), length 716)
  298. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 688
  299. NOTIFY sip:109@172.25.59.198:16692 SIP/2.0
  300. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3855685a;rport
  301. Max-Forwards: 70
  302. From: <sip:104@172.25.59.164>;tag=as4304a19f
  303. To: <sip:109@172.25.59.164>;tag=1640136391
  304. Contact: <sip:104@172.25.59.164:5060>
  305. Call-ID: 1841231122-16692-10@BHC.CF.FJ.BJI
  306. CSeq: 1018 NOTIFY
  307. User-Agent: FPBX-13.0.197(13.23.1)
  308. Subscription-State: active
  309. Event: dialog
  310. Content-Type: application/dialog-info+xml
  311. Content-Length: 223
  312.  
  313. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="916" state="full" entity="sip:104@172.25.59.164">\0x0a<dialog id="104" direction="recipient">\0x0a<state>early</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  314. 17:15:26.443437 IP (tos 0x30, ttl 64, id 40312, offset 0, flags [none], proto UDP (17), length 495)
  315. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 467
  316. SIP/2.0 200 OK
  317. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK0c1e3bdc;rport=5060
  318. From: <sip:104@172.25.59.164>;tag=as624a00cb
  319. To: <sip:104@172.25.59.164>;tag=750432846
  320. Call-ID: 848781887-59066-225@BHC.CF.FJ.CCJ
  321. CSeq: 1018 NOTIFY
  322. Contact: <sip:104@172.25.59.229:59066>
  323. Supported: replaces, path, timer
  324. User-Agent: Grandstream GXP1628 1.0.4.17
  325. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  326. Content-Length: 0
  327.  
  328.  
  329. 17:15:26.479204 IP (tos 0x68, ttl 64, id 42521, offset 0, flags [none], proto UDP (17), length 496)
  330. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 468
  331. SIP/2.0 200 OK
  332. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK3855685a;rport=5060
  333. From: <sip:104@172.25.59.164>;tag=as4304a19f
  334. To: <sip:109@172.25.59.164>;tag=1640136391
  335. Call-ID: 1841231122-16692-10@BHC.CF.FJ.BJI
  336. CSeq: 1018 NOTIFY
  337. Contact: <sip:109@172.25.59.198:16692>
  338. Supported: replaces, path, timer
  339. User-Agent: Grandstream GXP1628 1.0.4.55
  340. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  341. Content-Length: 0
  342.  
  343.  
  344. 17:15:26.526889 IP (tos 0x60, ttl 64, id 1464, offset 0, flags [none], proto UDP (17), length 985)
  345. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  346. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  347. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  348. Max-Forwards: 70
  349. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  350. To: <sip:104@172.25.59.229:59066>
  351. Contact: <sip:109@172.25.59.164:5060>
  352. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  353. CSeq: 102 INVITE
  354. User-Agent: FPBX-13.0.197(13.23.1)
  355. Date: Thu, 15 Aug 2019 21:15:26 GMT
  356. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  357. Supported: replaces, timer
  358. Alert-Info: <http://127.0.0.1>;info=;info=internal
  359. Content-Type: application/sdp
  360. Content-Length: 330
  361.  
  362. v=0
  363. o=root 678619286 678619286 IN IP4 172.25.59.164
  364. s=Asterisk PBX 13.23.1
  365. c=IN IP4 172.25.59.164
  366. t=0 0
  367. m=audio 17626 RTP/AVP 0 8 3 111 101
  368. a=rtpmap:0 PCMU/8000
  369. a=rtpmap:8 PCMA/8000
  370. a=rtpmap:3 GSM/8000
  371. a=rtpmap:111 G726-32/8000
  372. a=rtpmap:101 telephone-event/8000
  373. a=fmtp:101 0-16
  374. a=ptime:20
  375. a=maxptime:150
  376. a=sendrecv
  377.  
  378. 17:15:26.727140 IP (tos 0x60, ttl 64, id 1465, offset 0, flags [none], proto UDP (17), length 985)
  379. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  380. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  381. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  382. Max-Forwards: 70
  383. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  384. To: <sip:104@172.25.59.229:59066>
  385. Contact: <sip:109@172.25.59.164:5060>
  386. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  387. CSeq: 102 INVITE
  388. User-Agent: FPBX-13.0.197(13.23.1)
  389. Date: Thu, 15 Aug 2019 21:15:26 GMT
  390. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  391. Supported: replaces, timer
  392. Alert-Info: <http://127.0.0.1>;info=;info=internal
  393. Content-Type: application/sdp
  394. Content-Length: 330
  395.  
  396. v=0
  397. o=root 678619286 678619286 IN IP4 172.25.59.164
  398. s=Asterisk PBX 13.23.1
  399. c=IN IP4 172.25.59.164
  400. t=0 0
  401. m=audio 17626 RTP/AVP 0 8 3 111 101
  402. a=rtpmap:0 PCMU/8000
  403. a=rtpmap:8 PCMA/8000
  404. a=rtpmap:3 GSM/8000
  405. a=rtpmap:111 G726-32/8000
  406. a=rtpmap:101 telephone-event/8000
  407. a=fmtp:101 0-16
  408. a=ptime:20
  409. a=maxptime:150
  410. a=sendrecv
  411.  
  412. 17:15:27.126935 IP (tos 0x60, ttl 64, id 1466, offset 0, flags [none], proto UDP (17), length 985)
  413. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  414. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  415. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  416. Max-Forwards: 70
  417. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  418. To: <sip:104@172.25.59.229:59066>
  419. Contact: <sip:109@172.25.59.164:5060>
  420. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  421. CSeq: 102 INVITE
  422. User-Agent: FPBX-13.0.197(13.23.1)
  423. Date: Thu, 15 Aug 2019 21:15:26 GMT
  424. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  425. Supported: replaces, timer
  426. Alert-Info: <http://127.0.0.1>;info=;info=internal
  427. Content-Type: application/sdp
  428. Content-Length: 330
  429.  
  430. v=0
  431. o=root 678619286 678619286 IN IP4 172.25.59.164
  432. s=Asterisk PBX 13.23.1
  433. c=IN IP4 172.25.59.164
  434. t=0 0
  435. m=audio 17626 RTP/AVP 0 8 3 111 101
  436. a=rtpmap:0 PCMU/8000
  437. a=rtpmap:8 PCMA/8000
  438. a=rtpmap:3 GSM/8000
  439. a=rtpmap:111 G726-32/8000
  440. a=rtpmap:101 telephone-event/8000
  441. a=fmtp:101 0-16
  442. a=ptime:20
  443. a=maxptime:150
  444. a=sendrecv
  445.  
  446. 17:15:27.926843 IP (tos 0x60, ttl 64, id 1467, offset 0, flags [none], proto UDP (17), length 985)
  447. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  448. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  449. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  450. Max-Forwards: 70
  451. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  452. To: <sip:104@172.25.59.229:59066>
  453. Contact: <sip:109@172.25.59.164:5060>
  454. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  455. CSeq: 102 INVITE
  456. User-Agent: FPBX-13.0.197(13.23.1)
  457. Date: Thu, 15 Aug 2019 21:15:26 GMT
  458. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  459. Supported: replaces, timer
  460. Alert-Info: <http://127.0.0.1>;info=;info=internal
  461. Content-Type: application/sdp
  462. Content-Length: 330
  463.  
  464. v=0
  465. o=root 678619286 678619286 IN IP4 172.25.59.164
  466. s=Asterisk PBX 13.23.1
  467. c=IN IP4 172.25.59.164
  468. t=0 0
  469. m=audio 17626 RTP/AVP 0 8 3 111 101
  470. a=rtpmap:0 PCMU/8000
  471. a=rtpmap:8 PCMA/8000
  472. a=rtpmap:3 GSM/8000
  473. a=rtpmap:111 G726-32/8000
  474. a=rtpmap:101 telephone-event/8000
  475. a=fmtp:101 0-16
  476. a=ptime:20
  477. a=maxptime:150
  478. a=sendrecv
  479.  
  480. 17:15:29.526865 IP (tos 0x60, ttl 64, id 1468, offset 0, flags [none], proto UDP (17), length 985)
  481. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  482. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  483. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  484. Max-Forwards: 70
  485. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  486. To: <sip:104@172.25.59.229:59066>
  487. Contact: <sip:109@172.25.59.164:5060>
  488. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  489. CSeq: 102 INVITE
  490. User-Agent: FPBX-13.0.197(13.23.1)
  491. Date: Thu, 15 Aug 2019 21:15:26 GMT
  492. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  493. Supported: replaces, timer
  494. Alert-Info: <http://127.0.0.1>;info=;info=internal
  495. Content-Type: application/sdp
  496. Content-Length: 330
  497.  
  498. v=0
  499. o=root 678619286 678619286 IN IP4 172.25.59.164
  500. s=Asterisk PBX 13.23.1
  501. c=IN IP4 172.25.59.164
  502. t=0 0
  503. m=audio 17626 RTP/AVP 0 8 3 111 101
  504. a=rtpmap:0 PCMU/8000
  505. a=rtpmap:8 PCMA/8000
  506. a=rtpmap:3 GSM/8000
  507. a=rtpmap:111 G726-32/8000
  508. a=rtpmap:101 telephone-event/8000
  509. a=fmtp:101 0-16
  510. a=ptime:20
  511. a=maxptime:150
  512. a=sendrecv
  513.  
  514. 17:15:31.948950 IP (tos 0x60, ttl 64, id 1469, offset 0, flags [none], proto UDP (17), length 584)
  515. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 556
  516. OPTIONS sip:104@172.25.59.229:59066 SIP/2.0
  517. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK113c43c8
  518. Max-Forwards: 70
  519. From: "Unknown" <sip:Unknown@172.25.59.164>;tag=as63703f65
  520. To: <sip:104@172.25.59.229:59066>
  521. Contact: <sip:Unknown@172.25.59.164:5060>
  522. Call-ID: 7934f86234739a631bbf032a4bbab3e1@172.25.59.164:5060
  523. CSeq: 102 OPTIONS
  524. User-Agent: FPBX-13.0.197(13.23.1)
  525. Date: Thu, 15 Aug 2019 21:15:31 GMT
  526. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  527. Supported: replaces, timer
  528. Content-Length: 0
  529.  
  530.  
  531. 17:15:31.955722 IP (tos 0x30, ttl 64, id 40313, offset 0, flags [none], proto UDP (17), length 482)
  532. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 454
  533. SIP/2.0 200 OK
  534. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK113c43c8
  535. From: "Unknown" <sip:Unknown@172.25.59.164>;tag=as63703f65
  536. To: <sip:104@172.25.59.229:59066>;tag=691049150
  537. Call-ID: 7934f86234739a631bbf032a4bbab3e1@172.25.59.164:5060
  538. CSeq: 102 OPTIONS
  539. Supported: replaces, path, timer
  540. User-Agent: Grandstream GXP1628 1.0.4.17
  541. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  542. Content-Length: 0
  543.  
  544.  
  545. 17:15:32.727296 IP (tos 0x60, ttl 64, id 1470, offset 0, flags [none], proto UDP (17), length 985)
  546. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 957
  547. INVITE sip:104@172.25.59.229:59066 SIP/2.0
  548. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK1a81bc0a
  549. Max-Forwards: 70
  550. From: "109" <sip:109@172.25.59.164>;tag=as49973b36
  551. To: <sip:104@172.25.59.229:59066>
  552. Contact: <sip:109@172.25.59.164:5060>
  553. Call-ID: 2a50f5613cb73f3a4188bf6071cd3a37@172.25.59.164:5060
  554. CSeq: 102 INVITE
  555. User-Agent: FPBX-13.0.197(13.23.1)
  556. Date: Thu, 15 Aug 2019 21:15:26 GMT
  557. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  558. Supported: replaces, timer
  559. Alert-Info: <http://127.0.0.1>;info=;info=internal
  560. Content-Type: application/sdp
  561. Content-Length: 330
  562.  
  563. v=0
  564. o=root 678619286 678619286 IN IP4 172.25.59.164
  565. s=Asterisk PBX 13.23.1
  566. c=IN IP4 172.25.59.164
  567. t=0 0
  568. m=audio 17626 RTP/AVP 0 8 3 111 101
  569. a=rtpmap:0 PCMU/8000
  570. a=rtpmap:8 PCMA/8000
  571. a=rtpmap:3 GSM/8000
  572. a=rtpmap:111 G726-32/8000
  573. a=rtpmap:101 telephone-event/8000
  574. a=fmtp:101 0-16
  575. a=ptime:20
  576. a=maxptime:150
  577. a=sendrecv
  578.  
  579. 17:15:32.837628 IP (tos 0x60, ttl 64, id 1471, offset 0, flags [none], proto UDP (17), length 698)
  580. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 670
  581. NOTIFY sip:104@172.25.59.229:59066 SIP/2.0
  582. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK2b2524dd;rport
  583. Max-Forwards: 70
  584. From: <sip:104@172.25.59.164>;tag=as624a00cb
  585. To: <sip:104@172.25.59.164>;tag=750432846
  586. Contact: <sip:104@172.25.59.164:5060>
  587. Call-ID: 848781887-59066-225@BHC.CF.FJ.CCJ
  588. CSeq: 1019 NOTIFY
  589. User-Agent: FPBX-13.0.197(13.23.1)
  590. Subscription-State: active
  591. Event: dialog
  592. Content-Type: application/dialog-info+xml
  593. Content-Length: 206
  594.  
  595. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="917" state="full" entity="sip:104@172.25.59.164">\0x0a<dialog id="104">\0x0a<state>terminated</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  596. 17:15:32.842956 IP (tos 0x60, ttl 64, id 33852, offset 0, flags [none], proto UDP (17), length 699)
  597. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 671
  598. NOTIFY sip:109@172.25.59.198:16692 SIP/2.0
  599. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK2926fef5;rport
  600. Max-Forwards: 70
  601. From: <sip:104@172.25.59.164>;tag=as4304a19f
  602. To: <sip:109@172.25.59.164>;tag=1640136391
  603. Contact: <sip:104@172.25.59.164:5060>
  604. Call-ID: 1841231122-16692-10@BHC.CF.FJ.BJI
  605. CSeq: 1019 NOTIFY
  606. User-Agent: FPBX-13.0.197(13.23.1)
  607. Subscription-State: active
  608. Event: dialog
  609. Content-Type: application/dialog-info+xml
  610. Content-Length: 206
  611.  
  612. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="917" state="full" entity="sip:104@172.25.59.164">\0x0a<dialog id="104">\0x0a<state>terminated</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  613. 17:15:32.847914 IP (tos 0x30, ttl 64, id 40314, offset 0, flags [none], proto UDP (17), length 495)
  614. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 467
  615. SIP/2.0 200 OK
  616. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK2b2524dd;rport=5060
  617. From: <sip:104@172.25.59.164>;tag=as624a00cb
  618. To: <sip:104@172.25.59.164>;tag=750432846
  619. Call-ID: 848781887-59066-225@BHC.CF.FJ.CCJ
  620. CSeq: 1019 NOTIFY
  621. Contact: <sip:104@172.25.59.229:59066>
  622. Supported: replaces, path, timer
  623. User-Agent: Grandstream GXP1628 1.0.4.17
  624. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  625. Content-Length: 0
  626.  
  627.  
  628. 17:15:32.852791 IP (tos 0x68, ttl 64, id 42522, offset 0, flags [none], proto UDP (17), length 496)
  629. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 468
  630. SIP/2.0 200 OK
  631. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK2926fef5;rport=5060
  632. From: <sip:104@172.25.59.164>;tag=as4304a19f
  633. To: <sip:109@172.25.59.164>;tag=1640136391
  634. Call-ID: 1841231122-16692-10@BHC.CF.FJ.BJI
  635. CSeq: 1019 NOTIFY
  636. Contact: <sip:109@172.25.59.198:16692>
  637. Supported: replaces, path, timer
  638. User-Agent: Grandstream GXP1628 1.0.4.55
  639. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  640. Content-Length: 0
  641.  
  642.  
  643. 17:15:32.905765 IP (tos 0x60, ttl 64, id 33853, offset 0, flags [none], proto UDP (17), length 952)
  644. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 924
  645. SIP/2.0 200 OK
  646. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK1195671337;received=172.25.59.198;rport=16692
  647. From: "109" <sip:109@172.25.59.164>;tag=793769793
  648. To: <sip:104@172.25.59.164>;tag=as40d2049d
  649. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  650. CSeq: 451 INVITE
  651. Server: FPBX-13.0.197(13.23.1)
  652. Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
  653. Supported: replaces, timer
  654. Session-Expires: 1800;refresher=uas
  655. Contact: <sip:104@172.25.59.164:5060>
  656. P-Asserted-Identity: "104" <sip:104@172.25.59.164>
  657. Content-Type: application/sdp
  658. Require: timer
  659. Content-Length: 303
  660.  
  661. v=0
  662. o=root 396305819 396305819 IN IP4 172.25.59.164
  663. s=Asterisk PBX 13.23.1
  664. c=IN IP4 172.25.59.164
  665. t=0 0
  666. m=audio 16840 RTP/AVP 0 8 2 101
  667. a=rtpmap:0 PCMU/8000
  668. a=rtpmap:8 PCMA/8000
  669. a=rtpmap:2 G726-32/8000
  670. a=rtpmap:101 telephone-event/8000
  671. a=fmtp:101 0-16
  672. a=ptime:20
  673. a=maxptime:150
  674. a=sendrecv
  675.  
  676. 17:15:32.930561 IP (tos 0x68, ttl 64, id 42523, offset 0, flags [none], proto UDP (17), length 561)
  677. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 533
  678. ACK sip:104@172.25.59.164:5060 SIP/2.0
  679. Via: SIP/2.0/UDP 172.25.59.198:16692;branch=z9hG4bK244678278;rport
  680. From: "109" <sip:109@172.25.59.164>;tag=793769793
  681. To: <sip:104@172.25.59.164>;tag=as40d2049d
  682. Call-ID: 1328343243-16692-56@BHC.CF.FJ.BJI
  683. CSeq: 451 ACK
  684. Contact: <sip:109@172.25.59.198:16692>
  685. X-Grandstream-PBX: true
  686. Max-Forwards: 70
  687. Supported: replaces, path, timer
  688. User-Agent: Grandstream GXP1628 1.0.4.55
  689. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  690. Content-Length: 0
  691.  
  692.  
  693. 17:15:40.655564 IP (tos 0x60, ttl 64, id 1472, offset 0, flags [none], proto UDP (17), length 700)
  694. 172.25.59.164.sip > 172.25.59.229.59066: SIP, length: 672
  695. NOTIFY sip:104@172.25.59.229:59066 SIP/2.0
  696. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK263c23e4;rport
  697. Max-Forwards: 70
  698. From: <sip:108@172.25.59.164>;tag=as64a725e6
  699. To: <sip:104@172.25.59.164>;tag=1027093110
  700. Contact: <sip:108@172.25.59.164:5060>
  701. Call-ID: 1097792162-59066-224@BHC.CF.FJ.CCJ
  702. CSeq: 1525 NOTIFY
  703. User-Agent: FPBX-13.0.197(13.23.1)
  704. Subscription-State: active
  705. Event: dialog
  706. Content-Type: application/dialog-info+xml
  707. Content-Length: 206
  708.  
  709. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1423" state="full" entity="sip:108@172.25.59.164">\0x0a<dialog id="108">\0x0a<state>confirmed</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  710. 17:15:40.657355 IP (tos 0x60, ttl 64, id 33854, offset 0, flags [none], proto UDP (17), length 697)
  711. 172.25.59.164.sip > 172.25.59.198.16692: SIP, length: 669
  712. NOTIFY sip:109@172.25.59.198:16692 SIP/2.0
  713. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK30da024d;rport
  714. Max-Forwards: 70
  715. From: <sip:108@172.25.59.164>;tag=as4f2c4973
  716. To: <sip:109@172.25.59.164>;tag=329843314
  717. Contact: <sip:108@172.25.59.164:5060>
  718. Call-ID: 1099823425-16692-9@BHC.CF.FJ.BJI
  719. CSeq: 1525 NOTIFY
  720. User-Agent: FPBX-13.0.197(13.23.1)
  721. Subscription-State: active
  722. Event: dialog
  723. Content-Type: application/dialog-info+xml
  724. Content-Length: 206
  725.  
  726. <?xml version="1.0"?>\0x0a<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1423" state="full" entity="sip:108@172.25.59.164">\0x0a<dialog id="108">\0x0a<state>confirmed</state>\0x0a</dialog>\0x0a</dialog-info>[|sip]
  727. 17:15:40.665604 IP (tos 0x30, ttl 64, id 40315, offset 0, flags [none], proto UDP (17), length 497)
  728. 172.25.59.229.59066 > 172.25.59.164.sip: SIP, length: 469
  729. SIP/2.0 200 OK
  730. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK263c23e4;rport=5060
  731. From: <sip:108@172.25.59.164>;tag=as64a725e6
  732. To: <sip:104@172.25.59.164>;tag=1027093110
  733. Call-ID: 1097792162-59066-224@BHC.CF.FJ.CCJ
  734. CSeq: 1525 NOTIFY
  735. Contact: <sip:104@172.25.59.229:59066>
  736. Supported: replaces, path, timer
  737. User-Agent: Grandstream GXP1628 1.0.4.17
  738. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  739. Content-Length: 0
  740.  
  741.  
  742. 17:15:40.673643 IP (tos 0x68, ttl 64, id 42525, offset 0, flags [none], proto UDP (17), length 494)
  743. 172.25.59.198.16692 > 172.25.59.164.sip: SIP, length: 466
  744. SIP/2.0 200 OK
  745. Via: SIP/2.0/UDP 172.25.59.164:5060;branch=z9hG4bK30da024d;rport=5060
  746. From: <sip:108@172.25.59.164>;tag=as4f2c4973
  747. To: <sip:109@172.25.59.164>;tag=329843314
  748. Call-ID: 1099823425-16692-9@BHC.CF.FJ.BJI
  749. CSeq: 1525 NOTIFY
  750. Contact: <sip:109@172.25.59.198:16692>
  751. Supported: replaces, path, timer
  752. User-Agent: Grandstream GXP1628 1.0.4.55
  753. Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, REFER, UPDATE, MESSAGE
  754. Content-Length: 0
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