Ipecs-MG. SIP через VOIU на Asterisk, Got SDP but have no RTP session allocated Опции

[asdal]

Пытался сам разобраться, пользовался поиском, но не осилил, прошу консультации.
iPECS-MG 1.7Dh. Самая простая конфигурация: через VOIU вызов направляется на Asterisk по SIP.
Asterisk выдает ошибку: "ERROR: chan_sip.c process_sdp: Got SDP but have no RTP session allocated."
Вызовы проходят, все работает, но хочется убрать данную ошибку - возможно ли?
[кусочек core set debug]
chan_sip.c:25564 handle_incoming: **** Received ACK (6) - Command in SIP ACK
chan_sip.c:4002 __sip_ack: ** SIP TIMER: Cancelling retransmit of packet (reply received) Retransid #684
chan_sip.c:4035 __sip_ack: Stopping retransmission on '2a3b200-2a02010a-13c4-45026-2078-1b17c65-2078' of Response 1: Match Found
chan_sip.c:8910 process_sdp: Got SDP but have no RTP session allocated.
chan_sip.c:25848 handle_request_do: SIP message could not be handled, bad request: 2a3b200-2a02010a-13c4-45026-2078-1b17c65-2078
полный debug from asterisk [attachment=976:asterisk_debug.txt]

<--- SIP read from UDP:10.1.2.42:5060 --->
ACK sip:4457@10.1.2.45:5060;transport=UDP SIP/2.0
From: <sip:4033@10.1.2.45:5060;transport=UDP>;tag=2a30b70-2a02010a-13c4-45026-274b-4afa1c52-274b
To: <sip:4457@10.1.2.45:5060;transport=UDP>;tag=as2b7988b9
Call-ID: 2a3bf90-2a02010a-13c4-45026-274b-2a8d0b74-274b
CSeq: 1 ACK
Via: SIP/2.0/UDP 10.1.2.42:5060;rport;branch=z9hG4bK-274b-997fb4-7b6e4a3c
Max-Forwards: 70
Contact: <sip:4033@10.1.2.42:5060;transport=UDP>
Content-Type: application/sdp
Content-Length: 204

=0
o=iPECSMG 100494 100494 IN IP4 10.1.2.42
s=iPECSMG Call
c=IN IP4 10.1.2.42
t=0 0
m=audio 7002 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
<------------->
--- (10 headers 10 lines) ---
[Feb 7 15:29:40] ERROR[2838]: chan_sip.c:8910 process_sdp: Got SDP but have no RTP session allocated.

[ALLeX]

PCMU/PCMA пробовали менять?