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SIP, RTP over 4G LTE; non-VPN
tooLate
Member

I successfully tested SIP/RTP using a SIP Soft Phone , a VPN and VZW 4G-LTE network, my laptop with the Pantech UML295 4G-LTE modem.

Now, I want to do the same SIP/RTP tests without the VPN and just using the destination phone number (toll-free) and the MDN.

Is this possible with VZW 4G/LTE and the UML295 modem?..

I tried it, but without the VPN, the SIP Invite and its retries times-out and never gets any responses (Ringing, Trying or other).

The backend servers I am trying to connect to are not public IPs.so I cant specify them. A media gateway maps the call to

proper the backend servers.  The toll-free number and backend services I am trying has been in-place and working for years.

The MDN is in the SIP Invite header.

How might this be done?

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Re: SIP, RTP over 4G LTE; non-VPN
Weth
Sr. Leader
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Re: SIP, RTP over 4G LTE; non-VPN
Weth
Sr. Leader
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Re: SIP, RTP over 4G LTE; non-VPN
tooLate
Member

The article that was provided is dated July 2, 2013 -- almost two years ago.  Is there an update on this subject. Has Verizon fixed the issue or has plans to fix?

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