Okay, I looked at the trace again, it doesn't work exactly as I said with regards to the DNS lookups, but it might not be a bad idea to go that route anyway.
In any case, below is a portion of my trace log. The point is that all call transfers are either to localdomain:5063 or 192.168.1.100:5063. The DR however is using 127.0.0.1. This should be either the localdomain or IP address as mentioned earlier, not 127.0.0.1.
15:47:08.093|.\CallCtrl.cpp(100)|Log2||CallCtrl:

nIncomingCall:[CM503001]: Call(2): Incoming call from 3602234758@(Ln.10000@IPTel) to <sip:
[email protected]:5063:5063><br>
15:47:08.140|.\Line.cpp(326)|Log2||LineCfg::getInboundTarget:[CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:801<br>
15:47:08.140|.\CallEvents.cpp(75)|Trace5||FireStatusEvent:Fire event: Calling; DN 10000<br>
15:47:08.140|.\Line.cpp(945)|Log2||Line:

rintEndpointInfo:[CM505003]: Provider:[IPTel] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Asterisk PBX] Transport: [sip:192.168.1.100:5063]<br>
15:47:08.140|.\CallCtrl.cpp(163)|Trace5||CallCtrl:

nOfferSDP:OnOffer from "FERNDALE WA"
<sip:[email protected]:5063><br>
15:47:08.140|.\CallLeg.cpp(614)|Log5||CallLeg::setRemoteSdp:Remote SDP is set for legC:2.1<br>
15:47:08.140|.\Call.cpp(260)|Trace5||Call::Invite:Call::Invite<br>
15:47:08.140|.\CallCtrl.cpp(210)|Trace5||CallCtrl:

nSelectRouteReq:SelectRouteReq<br>
15:47:08.140|.\CallCtrl.cpp(225)|Log3||CallCtrl:
nSelectRouteReq:[CM503010]: Making route(s) to <sip:[email protected]:5063:5063><br>
15:47:08.156|.\CallCtrl.cpp(305)|Log2||CallCtrl:

nSelectRouteReq:[CM503004]: Call(2): Calling: IVR:801@[Dev]<br>
15:47:08.156|.\Call.cpp(250)|Trace5||Call::MakeCall:MakeCall from C:2.1 to IVR:801@[Dev]<br>
15:47:08.156|.\Call.cpp(120)|Trace5||Call::addLeg:Adding leg C:0.0<br>
15:47:08.156|.\MSInterface.cpp(655)|Trace5||??:MSLogReports<br>
15:47:08.156|.\SLServer.cpp(374)|Log5|MediaServer|MediaServerReporting::SetRemoteParty:[MS210000] C:2.1:Offer received. RTP connection: 213.192.59.91:53070(53071)<br>
15:47:08.171|.\Call.cpp(125)|Trace5||Call::addLeg:Legs count: 2<br>
15:47:08.171|ServerInviteSession.cxx(91)|Trace5|Resip|::ResipLogger:UAS_Offer: provisional(180)<br>
15:47:08.171|InviteSession.cxx(2046)|Trace5|Resip|::ResipLogger:Transition UAS_Offer -> UAS_EarlyOffer<br>
15:47:08.171|.\InviteADS.cpp(255)|Trace5||InviteADS:

nReadyToSend:SendMsg from <sip:
[email protected]>;tag=ae62e05a to "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d<br>
15:47:08.187|.\CallCtrl.cpp(406)|Trace5||CallCtrl:

nLegConnected

nLegConnected<br>
15:47:08.187|.\CallCtrl.cpp(419)|Log2||CallCtrl:

nLegConnected:[CM503007]: Call(2): Device joined: sip:<br>
15:47:08.187|.\CallEvents.cpp(75)|Trace5||FireStatusEvent:Fire event: Connected; DN 801<br>
15:47:09.031|.\Route.cpp(31)|Trace5||??:~Route=Dev:local<br>
15:47:09.031|.\Target.cpp(25)|Trace5||??:~Target=IVR:801@[]<br>
15:47:09.031|ServerInviteSession.cxx(251)|Trace5|Resip|::ResipLogger:UAS_EarlyOffer: provideAnswer<br>
15:47:09.031|InviteSession.cxx(2046)|Trace5|Resip|::ResipLogger:Transition UAS_EarlyOffer -> UAS_EarlyProvidedAnswer<br>
15:47:09.031|ServerInviteSession.cxx(443)|Trace5|Resip|::ResipLogger:UAS_EarlyProvidedAnswer: accept(200)<br>
15:47:09.031|InviteSession.cxx(2046)|Trace5|Resip|::ResipLogger:Transition UAS_EarlyProvidedAnswer -> UAS_Accepted<br>
15:47:09.031|.\InviteADS.cpp(255)|Trace5||InviteADS:

nReadyToSend:SendMsg from <sip:
[email protected]>;tag=ae62e05a to "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d<br>
15:47:09.031|.\InviteADS.cpp(175)|Trace5||InviteADS:

nConnected:Connected(UAS) from "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d to <sip:
[email protected]>;tag=ae62e05a<br>
15:47:09.031|.\CallLeg.cpp(294)|Trace5||CallLeg:

nConnected:Session 21 of leg C:2.1 is connected<br>
15:47:09.031|.\CallCtrl.cpp(406)|Trace5||CallCtrl:

nLegConnected

nLegConnected<br>
15:47:09.031|.\CallCtrl.cpp(419)|Log2||CallCtrl:

nLegConnected:[CM503007]: Call(2): Device joined: sip:
[email protected]<br>
15:47:09.031|.\MSInterface.cpp(655)|Trace5||??:MSLogReports<br>
15:47:09.031|.\SLServer.cpp(374)|Log5|MediaServer|MediaServerReporting::SetRemoteParty:[MS210003] C:2.1:Answer provided. Connection(transcoding mode):71.231.50.128:9002(9003)<br>
15:47:09.093|.\Line.cpp(326)|Log2||LineCfg::getInboundTarget:[CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:801<br>
15:47:09.093|.\CallEvents.cpp(75)|Trace5||FireStatusEvent:Fire event: Connected; DN 10000<br>
15:47:09.484|DialogUsageManager.cxx(1190)|Trace5|Resip|::ResipLogger:Got: SipReq: ACK
[email protected]:5063 tid=e6b187e61708d644f18303146eee7116 cseq=ACK
[email protected] / 102 from(wire)<br>
15:47:09.484|DialogUsageManager.cxx(1516)|Trace5|Resip|::ResipLogger:Handling in-dialog request: SipReq: ACK
[email protected]:5063 tid=e6b187e61708d644f18303146eee7116 cseq=ACK
[email protected] / 102 from(wire)<br>
15:47:09.484|ServerInviteSession.cxx(684)|Trace5|Resip|::ResipLogger:dispatchAccepted: SipReq: ACK
[email protected]:5063 tid=e6b187e61708d644f18303146eee7116 cseq=ACK
[email protected] / 102 from(wire)<br>
15:47:09.484|InviteSession.cxx(2046)|Trace5|Resip|::ResipLogger:Transition UAS_Accepted -> InviteSession::Connected<br>
15:47:09.484|.\InviteADS.cpp(190)|Trace5||InviteADS:

nConnectedConfirmed:ConnCfmd from "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d to <sip:
[email protected]>;tag=ae62e05a<br>
15:47:09.484|.\CallLeg.cpp(325)|Log5||CallLeg:

nConfirmed:Session 21 of leg C:2.1 is confirmed<br>
15:47:16.656|.\MSInterface.cpp(655)|Trace5||??:MSLogReports<br>
15:47:16.656|.\SLServer.cpp(381)|Log2|MediaServer|MediaServerReporting:

TMFhandler:[MS211000] C:2.1: 213.192.59.91:53070 is delivering DTMF using RTP payload (RFC2833). In-Band DTMF tone detection is disabled for this call segment.<br>
15:47:16.656|.\MSInterface.cpp(685)|Trace5||??

TMFEventHandler<br>
15:47:16.750|.\MSInterface.cpp(685)|Trace5||??

TMFEventHandler<br>
15:47:21.187|.\MSInterface.cpp(666)|Trace5||??:FilePlayEndEventHandler<br>
15:47:21.187|.\IVRInterface.cpp(210)|Trace5||??:IVRTransferRequestHandler<br>
15:47:21.187|.\CallCtrl.cpp(210)|Trace5||CallCtrl:

nSelectRouteReq:SelectRouteReq<br>
15
:47:21.187|.\CallCtrl.cpp(225)|Log3||CallCtrl:
nSelectRouteReq:[CM503010]: Making route(s) to <sip:[email protected]><br>
15:47:21.296|.\CM_Stack.cpp(192)|Trace5|SipStack|CallMgr::Stack::isMyExternalIP:Compare IPs: incoming=127.0.0.1; external=71.231.50.128<br>
15:47:21.296|.\CM_Stack.cpp(202)|Trace5|SipStack|CallMgr::Stack::isMyExternalIP:IPs do not match!<br>
15:47:21.296|.\CallCtrl.cpp(249)|Trace5||CallCtrl:
nSelectRouteReq
irect SIP call to <sip:[email protected]><br>
15:47:21.296|.\CallCtrl.cpp(273)|Log2||CallCtrl:
nSelectRouteReq:[CM503013]: Call(2): No known route to target: <sip:[email protected]><br>
15:47:21.296|.\Call.cpp(495)|Log2||Call::RouteFailed:[CM503014]: Call(2): Attempt to reach <sip:[email protected]> failed. Reason: Not Found<br>
15:47:23.000|.\MSInterface.cpp(666)|Trace5||??:FilePlayEndEventHandler<br>
15:47:28.796|DialogUsageManager.cxx(1190)|Trace5|Resip|::ResipLogger:Got: SipReq: BYE
[email protected]:5063 tid=d5.ee441f81.0 cseq=BYE / 103 from(wire)<br>
15:47:28.796|DialogUsageManager.cxx(1516)|Trace5|Resip|::ResipLogger:Handling in-dialog request: SipReq: BYE
[email protected]:5063 tid=d5.ee441f81.0 cseq=BYE / 103 from(wire)<br>
15:47:28.796|InviteSession.cxx(1592)|Trace5|Resip|::ResipLogger:Received SipReq: BYE
[email protected]:5063 tid=d5.ee441f81.0 cseq=BYE / 103 from(wire)<br>
15:47:28.796|.\InviteADS.cpp(255)|Trace5||InviteADS:

nReadyToSend:SendMsg from <sip:
[email protected]>;tag=ae62e05a to "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d<br>
15:47:28.796|InviteSession.cxx(2046)|Trace5|Resip|::ResipLogger:Transition InviteSession::Connected -> InviteSession::Terminated<br>
15:47:28.796|.\InviteADS.cpp(211)|Trace5||InviteADS:

nTerminated:Terminated from "FERNDALE WA"<sip:
[email protected]>;tag=as779fdd1d to <sip:
[email protected]>;tag=ae62e05a; reason: PeerEnded<br>
15:47:28.812|.\Line.cpp(326)|Log2||LineCfg::getInboundTarget:[CM503011]: Inbound out-of-office hours' rule for LN:10000 forwards to DN:801<br>
15:47:28.812|.\CallEvents.cpp(75)|Trace5||FireStatusEvent:Fire event: OnHook; DN 10000<br>