title: "SIP/2.0 488 Not acceptable here" error
body: <p>I am new to MjSip and I use MjUa for creating a client. I want to connect to a asterisk server. it support G.711 but I can not config my app.
  I use this config:</p>
  
  <pre><code> media=audio 4000 rtp/avp {audio 0 PCMU 8000 160, audio 8 PCMA 8000 160}
  </code></pre>
  
  <p>but i still get 488 error
  please help me. how change "MjUa" config  file?</p>
  
  <hr>
  
  <p>here is all message log:</p>
  
  <pre><code>INVITE sip:57@192.168.0.254:5060 SIP/2.0
  Via: SIP/2.0/UDP 192.168.0.57:5060;rport;branch=z9hG4bK2bfdff77
  Max-Forwards: 70
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  Call-ID: 728007708208@192.168.0.57
  CSeq: 1 INVITE
  Contact: &lt;sip:157@192.168.0.57&gt;
  Expires: 3600
  User-Agent: mjsip 1.7
  Content-Length: 141
  Content-Type: application/sdp
  
  v=0
  o=157 0 0 IN IP4 192.168.0.57
  s=-
  c=IN IP4 192.168.0.57
  t=0 0
  m=audio 4000 rtp/avp 0 8
  a=rtpmap:0 PCMU/8000
  a=rtpmap:8 PCMA/8000
  -----End-of-message-----
  
  1365314026097: 10:23:46.097 Sun 07 Apr 2013, 192.168.0.254:5060/udp (519 bytes) received
  SIP/2.0 401 Unauthorized
  Via: SIP/2.0/UDP 192.168.0.57:5060;branch=z9hG4bK2bfdff77;received=192.168.0.57;rport=5060
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;;tag=as3f160681
  Call-ID: 728007708208@192.168.0.57
  CSeq: 1 INVITE
  Server: FPBX-2.8.1(1.8.11.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
  Supported: replaces, timer
  WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="6e640e9a"
  Content-Length: 0
  
  -----End-of-message-----
  
  1365314026107: 10:23:46.107 Sun 07 Apr 2013, 192.168.0.254:5060/udp (326 bytes) sent
  ACK sip:57@192.168.0.254:5060 SIP/2.0
  Via: SIP/2.0/UDP 192.168.0.57:5060;rport;branch=z9hG4bK2bfdff77
  Max-Forwards: 70
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;;tag=as3f160681
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  Call-ID: 728007708208@192.168.0.57
  CSeq: 1 ACK
  User-Agent: mjsip 1.7
  Content-Length: 0
  
  -----End-of-message-----
  
  1365314026151: 10:23:46.151 Sun 07 Apr 2013, 192.168.0.254:5060/udp (706 bytes) sent
  INVITE sip:57@192.168.0.254:5060 SIP/2.0
  Via: SIP/2.0/UDP 192.168.0.57:5060;rport;branch=z9hG4bK644461b7
  Max-Forwards: 70
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  Call-ID: 728007708208@192.168.0.57
  CSeq: 2 INVITE
  Contact: &lt;sip:157@192.168.0.57&gt;
  Expires: 3600
  User-Agent: mjsip 1.7
  Authorization: Digest username="157", realm="asterisk", nonce="6e640e9a", uri="sip:57@192.168.0.254:5060", algorithm=MD5, response="84ff5e12b8325a153e09ac2e316f5b1f"
  Content-Length: 141
  Content-Type: application/sdp
  
  v=0
  o=157 0 0 IN IP4 192.168.0.57
  s=-
  c=IN IP4 192.168.0.57
  t=0 0
  m=audio 4000 rtp/avp 0 8
  a=rtpmap:0 PCMU/8000
  a=rtpmap:8 PCMA/8000
  -----End-of-message-----
  
  1365314026152: 10:23:46.152 Sun 07 Apr 2013, 192.168.0.254:5060/udp (450 bytes) received
  SIP/2.0 488 Not acceptable here
  Via: SIP/2.0/UDP 192.168.0.57:5060;branch=z9hG4bK644461b7;received=192.168.0.57;rport=5060
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;;tag=as3f160681
  Call-ID: 728007708208@192.168.0.57
  CSeq: 2 INVITE
  Server: FPBX-2.8.1(1.8.11.0)
  Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
  Supported: replaces, timer
  Content-Length: 0
  
  -----End-of-message-----
  
  1365314026155: 10:23:46.155 Sun 07 Apr 2013, 192.168.0.254:5060/udp (326 bytes) sent
  ACK sip:57@192.168.0.254:5060 SIP/2.0
  Via: SIP/2.0/UDP 192.168.0.57:5060;rport;branch=z9hG4bK644461b7
  Max-Forwards: 70
  To: "Alice" &lt;sip:57@192.168.0.254:5060&gt;;tag=as3f160681
  From: "aziz" &lt;sip:157@192.168.0.254&gt;;tag=350164683297
  Call-ID: 728007708208@192.168.0.57
  CSeq: 2 ACK
  User-Agent: mjsip 1.7
  Content-Length: 0
  
  -----End-of-message-----
  </code></pre>