3-d Party SIP Опции

[Зараза]

Есть eMG80. Зарегистрированы 112 - софт-фон на компьютере, 111 - SIP-DECT Panasonic KX-TGP500, 129 - Phontage Deluxe, 110 - аналоговый телефон. Все в локалке.

Проблема: не могу дозвониться на 111 с аналоговых телефонов eMG80.

Выход в город: 110, 111, 112, 129 - работает.
110 -> 112, 129 - все OK
129, 112 -> 111 - все OK
110 -> 111 - соединение не происходит, получаю отлуп.

вот в таком виде:
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.1.174:5060;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320;rport=5060
To: <sip:111@192.168.1.171>
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 INVITE
Content-Length: 0

SIP/2.0 488 Not Acceptable Here
Via: SIP/2.0/UDP 192.168.1.174:5060;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320;rport=5060
To: <sip:111@192.168.1.171>;tag=1395545948
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 INVITE
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS,NOTIFY,REFER,UPDATE
Content-Length: 0

Не могу понять как проблема может быть увязана с тем, что инициатор проблемного звонка - аналоговый абонент.

[Зараза]

Звонок с 110 на 111, отлуп.

Sent 895 Bytes to 192.168.1.171:5060 by UDP (SendEv)
--------------------------------------------------------------------------------
INVITE sip:111@192.168.1.171:5060 SIP/2.0
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
To: <sip:111@192.168.1.171:5060>
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 INVITE
Via: SIP/2.0/UDP 192.168.1.174:5060;rport;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320
Max-Forwards: 70
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,REGISTER,REFER,SUBSCRIBER,NOTIFY,MESSAGE,INFO,PRAC
K,UPDATE
P-Asserted-Identity: <sip:110@192.168.1.174>
Supported: replaces,UPDATE,INFO
User-Agent: Ericsson-LG Enterprise iPECS-eMG eMG80 A.0Kg
Contact: <sip:110@192.168.1.174:5060;transport=UDP>
Content-Type: application/sdp
Content-Length: 219

v=0
o=iPECS-eMG 39707 39707 IN IP4 192.168.1.174
s=iPECS-eMG Call
c=IN IP4 192.168.1.174
t=0 0
m=audio 65535 RTP/AVP 0 8 111
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:111 X-nt-inforeq/8000
a=sendrecv

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

397065-[CallIdx:68][Sipm_SipEvCallState(s:01)] OUTGOING - Inviting(reason:LOCAL_INVITING)
397065-[CallIdx:68][PORT NUMBER : 0x000d, Type:STN] CALL <--- SIPM (100 Trying)

[ 28/11/14 20:36:32 ]===========================================================
Received 315 Bytes from 192.168.1.171:5060 by UDP (ReceiveEv)
--------------------------------------------------------------------------------
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.1.174:5060;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320;rport=5060
To: <sip:111@192.168.1.171>
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 INVITE
Content-Length: 0


================================================================================

397074-[Sipm_SipTransportMsgReceivedExt]..Response...
397074-[CallIdx:68][Sipm_SipEvCallMsgReceive] SIPM <--- 100(Method:INVITE(0), reason:Trying)
397074-[CallIdx:68][Sipm_SipEvCallState(s:13)] OUTGOING - Proceeding(reason:NOTHING_ALL)

[ 28/11/14 20:36:32 ]===========================================================
Received 401 Bytes from 192.168.1.171:5060 by UDP (ReceiveEv)
--------------------------------------------------------------------------------
SIP/2.0 488 Not Acceptable Here
Via: SIP/2.0/UDP 192.168.1.174:5060;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320;rport=5060
To: <sip:111@192.168.1.171>;tag=1395545948
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 INVITE
Allow: INVITE,ACK,CANCEL,BYE,OPTIONS,NOTIFY,REFER,UPDATE
Content-Length: 0


================================================================================

397079-[Sipm_SipTransportMsgReceivedExt]..Response...
397079-[CallIdx:68][Sipm_SipEvCallMsgReceive] SIPM <--- 488(Method:INVITE(0), reason:Not Acceptable Here)
397079-[CallIdx:68][PORT NUMBER : 0x000d, Type:STN] CALL <--- SIPM (Response 488)
397079-[CallIdx:68][Sipm_SipEvCallMsgSend] SIPM ---> ACK
397079-[Sipm_SipCheckContactAddr] user:, system_ip:192.168.1.174:5060, trans_mode:UDP, URI
397079-[Sipm_SipUtilSetOtherHeaderInMsg] User-Agent => Ericsson-LG Enterprise iPECS-eMG eMG80 A.0Kg

[ 28/11/14 20:36:32 ]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Sent 471 Bytes to 192.168.1.171:5060 by UDP (SendEv)
--------------------------------------------------------------------------------
ACK sip:111@192.168.1.171:5060 SIP/2.0
From: <sip:110@192.168.1.174>;tag=40f3e2c0-ae01a8c0-13c4-65014-f79-4c39fedb-f79
To: <sip:111@192.168.1.171>;tag=1395545948
Call-ID: 40f75070-ae01a8c0-13c4-65014-f79-6603d065-f79
CSeq: 1 ACK
Via: SIP/2.0/UDP 192.168.1.174:5060;rport;branch=z9hG4bK-f79-3c745d-1a80a3c8-40efb320
Max-Forwards: 70
User-Agent: Ericsson-LG Enterprise iPECS-eMG eMG80 A.0Kg
Contact: <sip:110@192.168.1.174:5060;transport=UDP>
Content-Length: 0