[Asterisk-Users] Asterisk to CCM4 SIP Trunk one-way audio problem.

[Jeremy Wadhams]

Have you tried turning off SIP fixup on the PIX?  On any version below 7.x it should be

no fixup protocol sip 5060
no fixup protocol sip udp 5060

I've had all kinds of problems with PIX firewalls peeking inside of packets (more with SCCP than SIP) and deciding not to open a port...

--JW

----- Original Message ----
From: kevin ling <kevin.ling at amphenol.com.tw>
To: Asterisk Users Mailing List - Non-Commercial Discussion <asterisk-users at lists.digium.com>
Sent: Monday, April 10, 2006 4:12:39 AM
Subject: [Asterisk-Users] Asterisk to CCM4 SIP Trunk one-way audio problem.

    Hello, ,
  
 I have some of asterisk  to CCM4 SIP trunk oneway audio problems.  
  
 I have setup a asterisk server. It's work great and have no  any problems connect to local ITSP (using SIP protocol) . But we need to  build a sip trunk to another CCM4 server.
  
 The network typology like this.
  
 SIP Phone (192.168.1.100) <-----------> 192.168.1.254  (Asterisk Server) 59.124. xx.xx  <------------> [INERNET] <-------------> PIX firewall  <---------> CCM4
  
 1.The CCM4 side user can call to my asterisk extension and  work great. 
 2.When I make a call from SIP phone to CCM4 extension. The  CCM4 user can pickup the call but he can't hear me. It's seems have an  one-way audio  problem.
  
 The PIX firewall already mapping the TCP/UDP 5060 and UDP  16384-32768 to CCM4 Server.
  
 I have try to install another sip phone  using public IP. It's same problems.
  
 Anyone have any suggest on the settings?  
  
 My sip.conf configuration:
 [ccm4]
 context=.............. 
 canreinvite=no
host= the_ccm4_server_ip
nat=no
qualify=yes
type=peer
  
  
 I have change a lot of settings. canreinvite=yes or no,  nat=yes/no qualify=yes/no. It's doesn't work.
  
 Thank you for your help.
  
 Best regards,
 Kevin

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