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

[Dreamsteve]

David Stahl <davidstahl23 <at> gmail.com> writes:

> 
> 
> 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 DudeSent: Friday, 
July 18, 2014 1:00 PMTo: asterisk-users <at> lists.digium.comSubject: 
[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? 
> 
> 
> --
> _____________________________________________________________________

I have been looking into running my asterisk server on 4g but the ping 
times i'm getting hover around 90-120 ms (mostly).  How many concurrent 
calls can I expect to be able to handle as this will only be temporary 
until I get my fiber line installed at the building?