[asterisk-users] VoIP over 3G/4G Data

[David Stahl]

We use standard sip ports all day long, and have had no issues with
employee phones on the verzion network.
On Jul 18, 2014 12:03 PM, "Eric Wieling" <EWieling at nyigc.com> wrote:

> Depends on the carrier.   Verizon Wireless appears to activly block
> SIP.    G729 codec is needed on 3G and is a good idea on 4G.   I use TLS
> and SRTP to work around carrier stupidity.  I also use a non-standard port
> for TLS.   It mostly works much of the time.   Don’t get BRIA, every time
> your registration is dropped it will popup a notification.
>
>
>
> *From:* asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] *On Behalf Of *Tech Dude
> *Sent:* Friday, July 18, 2014 1:00 PM
> *To:* asterisk-users at lists.digium.com
> *Subject:* [asterisk-users] VoIP over 3G/4G Data
>
>
>
> What are the recommended settings to successfully implement VoIP over
> 3G/4G data connection. Assume we are talking about using Polycom phones,
> and the 3G/4G data connection comes from a Cradlepoint router that is
> plugged in with AC power and has high gain antennas. The device will be
> stationary, so we will not have to worry about tower handoff’s breaking the
> connection. This will be for fixed wireless.
>
>
>
> I have read to use G.729 codec, and TCP for signaling to bypass firewalls.
> Besides that, what other settings are recommended?  Changes in MTU? Changes
> in voice payload ms? Is there a better codec to use? Header compression?
>
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