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Hi there<br />
<br />
OK this is NAT issue . . Place your SIP server with a Public IP address.<br />
<br />
<br />
regards.
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Hi there

OK this is NAT issue . . Place your SIP server with a Public IP address.


regards.

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Any suggestions on how to do what you are suggesting?<br />
I tried to set the sip phone with the public ip of ourt call manager, but it was not able to establish a connection.
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Any suggestions on how to do what you are suggesting?
I tried to set the sip phone with the public ip of ourt call manager, but it was not able to establish a connection.

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Check if the original IP address of the network adapter is being sent in the invite packet rather than the VPN IP address, this causes the audio to be streamed to the wrong IP and as such one way voice is experienced.
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Check if the original IP address of the network adapter is being sent in the invite packet rather than the VPN IP address, this causes the audio to be streamed to the wrong IP and as such one way voice is experienced.

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One-way-voice problem using SIP phone on Mac OS X over VPN. &nbsp;Phone works perfectly when connected locally, but user does not hear voice when connected with the VPN. &nbsp;Vista PC using the same SIP phone over a VPN works fine.<br />
Does anyone know a solution for this? &nbsp;I have seen various post about this, but no resolutions.
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One-way-voice problem using SIP phone on Mac OS X over VPN.  Phone works perfectly when connected locally, but user does not hear voice when connected with the VPN.  Vista PC using the same SIP phone over a VPN works fine.
Does anyone know a solution for this?  I have seen various post about this, but no resolutions.

One way voice problem over SIP phone installed on Mac OS X using VPN

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).