[Users] any howto for using mediaproxy with openser

[unplug]

When I make a call from PSTN to IPPhone, the following error shown. 
Is it related to the same problem as by previous post?

message from openser to G/W
U 203.193.46.6:5060 -> 203.193.46.2:5060
  SIP/2.0 483 Too Many Hops..Via: SIP/2.0/UDP  203.193.46.2:5060..From: <si
  p:3634 at 203.193.46.2>;tag=2945E878-2498..To: <sip:8498 at 203.193.46.
  6>;tag=b5ab8e75af536221ca172f8fc39505eb.a169..Call-ID: 52A60849-6D5311DA-
  8286A518-578F6E21 at 203.193.46.2..CSeq: 101 INVITE..Server: OpenSer (1.0.0
  (i386/linux))..Content-Length: 0..Warning: 392 203.193.46.6:5060 "Noisy f
  eedback tells:  pid=13742 req_src_ip=203.193.46.6 req_src_port=5060 in_ur
  i=sip:8498 at 203.193.46.6:5060 out_uri=sip:8498 at 203.193.46.6:5060
   via_cnt==16"....
On 12/16/05, unplug <maillisting at gmail.com> wrote:
> Thanks!  Unless I know the scripts are working.
> Well, I am using the sample gw-pstn.5.0.cfg.  I can make call from IP
> phone to PSTN phone, the callee rings but there is no ring tone in
> caller.  Below is the log with error 500.  Is it the configuration
> problem of mediaproxy?
>
> A message from G/W to openser
> U 203.193.46.2:5060 -> 203.193.46.6:5060
>   SIP/2.0 500 FQDN in SDP Media cannot be resolved..Via: SIP/2.0/UDP 203.193.
>   46.6;branch=z9hG4bK92a3.b70bebf.0,SIP/2.0/UDP 10.0.0.54:5060;rport=15060;
>   received=210.184.43.1;branch=z9hG4bKm2iYDC7IcO4digOk..From: "8498" <si
>   p:8498 at o01.ol.com>;tag=VzXcnm2ihb05wKiC..To: "93634" <sip
>   :93634 at o01.ol.com>;tag=28B191AC-B8F..Date: Fri, 16 Dec 2005 0
>   7:30:46 GMT..Call-ID: wKLVEZGcY3rHMY8K at 10.0.0.54..Server: Cisco-SIPGateway/
>   IOS-12.x..CSeq: 1 INVITE..Allow-Events: telephone-event..Content-Length: 0.
>
>   ...
>
> There is a warning from the log:
> Warning: sl_send_reply: I won't send a reply for ACK!!
>