Question : Enabling SIP from inside to outside!

Hello all,

I've using PIX-525 firewall. The SIP modem installed on the DMZ with contact center devices, and all agent are located inside. now when the agent try to make a calls the other recipient can't hear but the agent can hear.

So, what do thing the problem is? and how can I allow the call to pass from inside?

thank you...

Answer : Enabling SIP from inside to outside!

Note: From the agents side; the agent cant hear the caller but the caller can hear the agent.
The UDP ports1024 to 65535 has been opened as the following Access-List shows below, also the attached figure shows the exact diagram:

access-list in_out extended permit udp any any range 1024 65535
access-list outside_access_in extended permit udp any host 150.1.60.120 range 1024 65535
access-list in_out extended permit udp any host 150.1.60.120 range 1024 65535
access-list in_out extended permit udp host 150.1.60.120 any range 1024 65535
access-list outside_access_in extended permit udp host 150.1.60.120 any  range 1024 65535
access-list outside_access_in extended permit udp any host 150.1.60.120 eq 5060
access-list outside_access_in extended permit udp any host 150.1.60.120 eq 5070
access-list in_out extended permit udp host 150.1.60.120 any eq 5060
access-list in_out extended permit udp host 150.1.60.120 any eq 5070

Call-Center.JPG (122 KB) (File Type Details) 

Contact center diagram