SIP troubles

Question

Добрый вечер. Стоит Астериск 1.8.15 + free pbx. Настроены 3 SIP транка от разных провайдеров, 2 успешно и один нет. Настройки идентичны за исключением ip и пароля. Настройки неработающего транка:

type=peer
host=109.198.104.174
externip=82.193.158.49
secret=Password
username=00217
fromuser=379400
port=5060
canreinvite=no
qualify=yes
context=from-trunk
allow=g729&alaw
insecure=invite, port
dtmfmode=info

Строка регистрации:379400@109.198.104.174:Password:00217@109.198.104.174:5060/379400

Настройки работающего транка, он без регистрации:

type=peer
host=ip-address
externip=ip-address
fromuser=telephone
port=5060
insecure=port,invite
context=from-trunk
canreinvite=no
allow=g729&alaw
qualify=yes
dtmfmode=info

tcpdump при попытке звонка выдаёт:

01:10:47.807873 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:10:48.311247 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:10:49.311283 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:10:51.310670 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:10:55.310880 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:11:03.314631 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124
01:11:12.088264 IP idealcomp.convex.ru.sip > 174.104.198.109.e-tagil.ru.sip: SIP, length: 529
01:11:12.096229 IP 174.104.198.109.e-tagil.ru.sip > idealcomp.convex.ru.sip: SIP, length: 536
01:11:19.316260 IP 174.104.198.109.e-tagil.ru.sip-tls > idealcomp.convex.ru.sip: SIP, length: 1124

SIP debug on peer

Reliably Transmitting (no NAT) to 109.198.104.174:5060:
OPTIONS sip:109.198.104.174 SIP/2.0
Via: SIP/2.0/UDP 82.193.158.49:5060;branch=z9hG4bK72f19b31
Max-Forwards: 70
From: "Unknown" <sip:379400@82.193.158.49>;tag=as5915e07e
To: <sip:109.198.104.174>
Contact: <sip:379400@82.193.158.49:5060>
Call-ID: 22cf5a00050b321c4fbc8be9427b030a@82.193.158.49:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-2.10.0rc1(1.8.15)
Date: Sat, 01 Jun 2013 19:18:12 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Length: 0


---

<--- SIP read from UDP:109.198.104.174:5060 --->
SIP/2.0 200 OK
Via: SIP/2.0/UDP 82.193.158.49:5060;branch=z9hG4bK72f19b31
From: "Unknown" <sip:379400@82.193.158.49>;tag=as5915e07e
To: <sip:109.198.104.174>;tag=3401781036-3792826570-352374691-722841111
Call-ID: 22cf5a00050b321c4fbc8be9427b030a@82.193.158.49:5060
CSeq: 102 OPTIONS
Allow: ACK, BYE, CANCEL, INFO, INVITE, OPTIONS, PRACK, REFER, REGISTER, SUBSCRIBE, UPDATE
Accept: application/dtmf-relay
Accept: application/ISUP
Accept: application/sdp
Supported: 100rel
Server: MERA MVTS3G v.4.4.0-23aS
Content-Length: 0

<------------->
--- (13 headers 0 lines) ---
Really destroying SIP dialog '22cf5a00050b321c4fbc8be9427b030a@82.193.158.49:5060' Method: OPTIONS

В чем может быть проблема подскажите, пожалуйста.