[VoiceOps] Grandstream VoIP phones

Matt Yaklin myaklin at g4.net
Fri Aug 17 13:34:01 EDT 2012

I did not have access to the firewall but it was an older model
that no longer got firmware updates. That webpage pic looks like
the newer NSA series which are pretty nice for a firewall.

Turning off sip transformations is something we always try.
The consistent NAT, if I recall correctly, was not available in this
older model.

Thanks for the tips. The customer put in some really cheap netgear
router and it fixed the issues they were having.


On Fri, 17 Aug 2012, Carlos Alvarez wrote:

> On Fri, Aug 17, 2012 at 10:20 AM, Matt Yaklin <myaklin at g4.net> wrote:
>       We just ran into a problem of some Cisco phones not handling odd
>       quirks of a Sonicwall FW yet the Polycoms handled it like a champ.
>       I forget the model.
> We recommend these settings for Sonicwall, and they work with Cisco, Grandstream, and others:
> http://support.televolve.com/entries/21671841-how-to-configure-a-sonicwall-router-for-voip
> --
> Carlos Alvarez
> TelEvolve
> 602-889-3003

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