[VoiceOps] Issues with ISPs blocking SIP 5060 - 5061

Marco Teixeira admin at marcoteixeira.com
Thu Nov 21 12:41:52 EST 2013


I thought you might find this usefull:

It's a good way to make sure you don't have issues like these, also avoid
bad NAT ALGs and the usual stuff...

The alternative is to use CISCO phones. With recent 9.x firmware, you can
get them to build a VPN to an ASA that could be next to your SIP server.
The licence price for this feature is a "litle" high.

I don't work for neither of them.

Cumprimentos / Best regards

Marco Teixeira
email/gtalk/msn: admin at marcoteixeira.com
skype: admin-marcoteixeira.com
Did you know that Marco Teixeira is an independent,  industry expert, senior
consultant ? His expertise is available for hire.

On Thu, Nov 21, 2013 at 5:32 PM, Matt Yaklin <myaklin at g4.net> wrote:

> On Thu, 21 Nov 2013, Jay Hennigan wrote:
>  On 11/21/13 5:36 AM, J. Oquendo wrote:
>>  "Getting the carrier..." We try not to inherit
>>> any of the network unless we are managing it. This frees us
>>> from any liabilities associated with say a Doctors office
>>> doing some whacky VPN to a hospital or other. Would take us
>>> too long to perform a network assessment, and make sense of
>>> a client's business needs, especially for free.
>> It's a balancing act, to be sure.  Your customer will of course say that
>> the rest of the Internet works fine, it's just your VoIP service that is
>> failing.  "I can get to Google and Yahoo, so there's nothing wrong with
>> my Internet, but your phone doesn't work."
>> For one-off remote phones, setting SIP transport to TCP is often a good
>> workaround by the way.
> Will tunneling the sip/rtp packets be more common in the near future
> for SIP phone providers?
> matt
>  --
>> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
>> Impulse Internet Service  -  http://www.impulse.net/
>> Your local telephone and internet company - 805 884-6323 - WB6RDV
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