1

我正在尝试在我的 Asterisk/Freepbx 实例上设置 Twilio Elastic SIP Trunking，并且很难建立可靠的起源（终止工作非常好）。

背景 - 我已经按照 twilio 指南、freepbx 和 stackoverflow 上的大量论坛帖子完成了所有设置，并且在大多数情况下它是一个工作设置。

  1. 从扩展/ pbx 出站 - 效果非常好，非常清晰。
  2. 从 PSTN 到 Twilio 号码的入站：我先听到几声短铃声，然后是几声长铃声，它“可能”最终会呼叫我的分机。25% 的呼叫来自我的分机（并且成功且随机地来自 Twilio 白名单 IP 之一，不一定是相同的 IP）。75% 的通话会因哔哔声、通话无法连接等消息而断开连接。
  3. 当我使用“拨打测试电话”按钮从 Twilio 的“起源”设置页面进行呼叫时，呼叫是即时的并且工作正常。

在上面的 #2 中，我注意到我听到的每一个铃声都会在 Twilio 中出现“失败”登录。我无法从日志中解读出太多信息（没有任何 401、403 等）。有人可以帮忙吗？为什么#3 总是有效（Twilio 的测试呼叫按钮）？

以下是失败调用的 Twilio 日志：

INVITE sip:+1TWILIONUMBER@MYASTERSIKIP SIP/2.0
Record-Route: <sip:54.172.60.0:5060;lr;ftag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;isup-oli=0;pstn-params=9084818088;cpc=ordinary>;tag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>
CSeq: 9141 INVITE
Max-Forwards: 63
Accept: application/sdp
Accept: application/isup
Accept: application/dtmf
Accept: application/dtmf-relay
Accept: multipart/mixed
Session-Expires: 1800
Min-SE: 90
Content-Disposition: session;handling=required
Diversion: <sip:+1TWILIONUMBER@public-vip.us1.twilio.com>;reason=unconditional
Call-ID: 3612263d48dd307c857c2d3c1815ba73@0.0.0.0
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK18.e94819e6.0
Via: SIP/2.0/UDP 172.18.12.93:5060;rport=5060;received=172.18.12.93;branch=z9hG4bK40eb6ad8-c345-48cf-955c-425fd0246d38_6772d868_285296189381176
Contact: <sip:+1MYPSTNPHONE@172.18.12.93:5060;transport=udp>
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: AC9172c558ab99243b3cccdce67dadd1b9
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CAe5541067a3270dbe765ee9c0b839cec5
Content-Length: 231

v=0
o=- 869153823 869153823 IN IP4 54.172.60.79
s=Twilio Media Gateway
c=IN IP4 54.172.60.79
t=0 0
m=audio 13460 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
INVITE sip:+1TWILIONUMBER@MYASTERSIKIP SIP/2.0
Record-Route: <sip:54.172.60.0:5060;lr;ftag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;isup-oli=0;pstn-params=9084818088;cpc=ordinary>;tag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>
CSeq: 9141 INVITE
Max-Forwards: 63
Accept: application/sdp
Accept: application/isup
Accept: application/dtmf
Accept: application/dtmf-relay
Accept: multipart/mixed
Session-Expires: 1800
Min-SE: 90
Content-Disposition: session;handling=required
Diversion: <sip:+1TWILIONUMBER@public-vip.us1.twilio.com>;reason=unconditional
Call-ID: 3612263d48dd307c857c2d3c1815ba73@0.0.0.0
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK18.e94819e6.0
Via: SIP/2.0/UDP 172.18.12.93:5060;rport=5060;received=172.18.12.93;branch=z9hG4bK40eb6ad8-c345-48cf-955c-425fd0246d38_6772d868_285296189381176
Contact: <sip:+1MYPSTNPHONE@172.18.12.93:5060;transport=udp>
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: AC9172c558ab99243b3cccdce67dadd1b9
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CAe5541067a3270dbe765ee9c0b839cec5
Content-Length: 231

v=0
o=- 869153823 869153823 IN IP4 54.172.60.79
s=Twilio Media Gateway
c=IN IP4 54.172.60.79
t=0 0
m=audio 13460 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
INVITE sip:+1TWILIONUMBER@MYASTERSIKIP SIP/2.0
Record-Route: <sip:54.172.60.0:5060;lr;ftag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;isup-oli=0;pstn-params=9084818088;cpc=ordinary>;tag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>
CSeq: 9141 INVITE
Max-Forwards: 63
Accept: application/sdp
Accept: application/isup
Accept: application/dtmf
Accept: application/dtmf-relay
Accept: multipart/mixed
Session-Expires: 1800
Min-SE: 90
Content-Disposition: session;handling=required
Diversion: <sip:+1TWILIONUMBER@public-vip.us1.twilio.com>;reason=unconditional
Call-ID: 3612263d48dd307c857c2d3c1815ba73@0.0.0.0
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK18.e94819e6.0
Via: SIP/2.0/UDP 172.18.12.93:5060;rport=5060;received=172.18.12.93;branch=z9hG4bK40eb6ad8-c345-48cf-955c-425fd0246d38_6772d868_285296189381176
Contact: <sip:+1MYPSTNPHONE@172.18.12.93:5060;transport=udp>
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: AC9172c558ab99243b3cccdce67dadd1b9
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CAe5541067a3270dbe765ee9c0b839cec5
Content-Length: 231

v=0
o=- 869153823 869153823 IN IP4 54.172.60.79
s=Twilio Media Gateway
c=IN IP4 54.172.60.79
t=0 0
m=audio 13460 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
INVITE sip:+1TWILIONUMBER@MYASTERSIKIP SIP/2.0
Record-Route: <sip:54.172.60.0:5060;lr;ftag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;isup-oli=0;pstn-params=9084818088;cpc=ordinary>;tag=90304243_6772d868_40eb6ad8-c345-48cf-955c-425fd0246d38
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>
CSeq: 9141 INVITE
Max-Forwards: 63
Accept: application/sdp
Accept: application/isup
Accept: application/dtmf
Accept: application/dtmf-relay
Accept: multipart/mixed
Session-Expires: 1800
Min-SE: 90
Content-Disposition: session;handling=required
Diversion: <sip:+1TWILIONUMBER@public-vip.us1.twilio.com>;reason=unconditional
Call-ID: 3612263d48dd307c857c2d3c1815ba73@0.0.0.0
Via: SIP/2.0/UDP 54.172.60.0:5060;branch=z9hG4bK18.e94819e6.0
Via: SIP/2.0/UDP 172.18.12.93:5060;rport=5060;received=172.18.12.93;branch=z9hG4bK40eb6ad8-c345-48cf-955c-425fd0246d38_6772d868_285296189381176
Contact: <sip:+1MYPSTNPHONE@172.18.12.93:5060;transport=udp>
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: AC9172c558ab99243b3cccdce67dadd1b9
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CAe5541067a3270dbe765ee9c0b839cec5
Content-Length: 231

v=0
o=- 869153823 869153823 IN IP4 54.172.60.79
s=Twilio Media Gateway
c=IN IP4 54.172.60.79
t=0 0
m=audio 13460 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv

Twilio 日志视图

成功调用的 Twilio 日志：

INVITE sip:+1TWILIONUMBER@MYASTERSIKIP SIP/2.0
Record-Route: <sip:54.172.60.1:5060;lr;ftag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>
CSeq: 31801 INVITE
Max-Forwards: 11
Accept: application/sdp
Accept: application/isup
Accept: application/dtmf
Accept: application/dtmf-relay
Accept: multipart/mixed
Session-Expires: 1800
Min-SE: 90
Content-Disposition: session;handling=required
Diversion: <sip:+1TWILIONUMBER@public-vip.us1.twilio.com>;reason=unconditional
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.0
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=172.18.3.99;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285301165960484
Contact: <sip:+1MYPSTNPHONE@172.18.3.99:5060;transport=udp>
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS
User-Agent: Twilio Gateway
X-Twilio-AccountSid: AC9172c558ab99243b3cccdce67dadd1b9
X-Twilio-ApiVersion: 2010-04-01
Content-Type: application/sdp
X-Twilio-CallSid: CAe6bf2966fc9f8990f508c0d57b7e7dc9
Content-Length: 233

v=0
o=- 377936330 377936330 IN IP4 54.172.60.201
s=Twilio Media Gateway
c=IN IP4 54.172.60.201
t=0 0
m=audio 11960 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=172.18.3.99;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285301165960484
Record-Route: <sip:54.172.60.1:5060;lr;ftag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060;user=phone>
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31801 INVITE
Server: FPBX-12.0.70(13.9.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060>
Content-Length: 0

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=172.18.3.99;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285301165960484
Record-Route: <sip:54.172.60.1:5060;lr;ftag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060;user=phone>;tag=as3a65945e
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31801 INVITE
Server: FPBX-12.0.70(13.9.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060>
Content-Length: 0

SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=172.18.3.99;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285301165960484
Record-Route: <sip:54.172.60.1:5060;lr;ftag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060;user=phone>;tag=as3a65945e
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31801 INVITE
Server: FPBX-12.0.70(13.9.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060>
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=172.18.3.99;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285301165960484
Record-Route: <sip:54.172.60.1:5060;lr;ftag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda>
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060;user=phone>;tag=as3a65945e
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31801 INVITE
Server: FPBX-12.0.70(13.9.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Contact: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060>
Content-Type: application/sdp
Content-Length: 483

v=0
o=root 2047240699 2047240699 IN IP4 MYASTERSIKIP
s=Asterisk PBX 13.9.1
c=IN IP4 MYASTERSIKIP
t=0 0
m=audio 14374 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:150
a=ice-ufrag:29fbe7313c8689b0102f9d503d9eb401
a=ice-pwd:7eb4637401aca4580b6985857be28247
a=candidate:Hc0a81d9a 1 UDP 2130706431 192.168.29.154 14374 typ host
a=candidate:Hc0a81d9a 2 UDP 2130706430 192.168.29.154 14375 typ host
a=sendrecv
ACK sip:+1TWILIONUMBER@MYASTERSIKIP:5060 SIP/2.0
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31801 ACK
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>;tag=as3a65945e
Max-Forwards: 69
User-Agent: Twilio
X-Twilio-CallSid: CAe6bf2966fc9f8990f508c0d57b7e7dc9
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bKb67c.e698b2c7.2
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=54.172.60.201;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285306732657503
Content-Length: 0

BYE sip:+1TWILIONUMBER@MYASTERSIKIP:5060 SIP/2.0
CSeq: 31802 BYE
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP;user=phone>;tag=as3a65945e
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
Max-Forwards: 68
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bK867c.164aadb4.0
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=54.172.60.201;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285317504904769
User-Agent: Twilio Gateway
X-Twilio-CallSid: CAe6bf2966fc9f8990f508c0d57b7e7dc9
Content-Length: 0

SIP/2.0 200 OK
Via: SIP/2.0/UDP 54.172.60.1:5060;branch=z9hG4bK867c.164aadb4.0;received=54.172.60.1;rport=5060
Via: SIP/2.0/UDP 172.18.3.99:5060;rport=5060;received=54.172.60.201;branch=z9hG4bK4b230251-675c-48ca-92d5-24d1f90c4cda_6772d868_285317504904769
From: <sip:+1MYPSTNPHONE@MYTWILIOORGID.pstn.twilio.com;pstn-params=808181808882;cpc=ordinary>;tag=65942748_6772d868_4b230251-675c-48ca-92d5-24d1f90c4cda
To: <sip:+1TWILIONUMBER@MYASTERSIKIP:5060;user=phone>;tag=as3a65945e
Call-ID: c4d7a4854a1246e4a19d1c56d3f0e169@0.0.0.0
CSeq: 31802 BYE
Server: FPBX-12.0.70(13.9.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Content-Length: 0
4

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