[cisco-voip] t.38

[Nick Matthews]

That article wasn't correct - towards the bottom it states H323 on the
VG224 doesn't support standards based faxing, which isn't true. There's
nothing different about a VG224 and a FXS port on a router. And there
really isn't much different from a PRI and a FXS port on a router from a
capabilities standpoint (minus SCCP support).

In theory modem passthrough, protocol based relay, and nse based relay
should work in any permutation of configuration.  They all kick off at
slightly different times, so it continues to negotiate if one doesn't work.
However, it introduces complexity and it's likely for problems to occur
because of multiple being configured due to bugs and corner cases.

-nick

On Fri, Aug 31, 2012 at 4:41 PM, Ted Nugent <tednugent73 at gmail.com> wrote:

> Thanks for clarifying Nate, that's right, I misspoke.
>
>
> On Fri, Aug 31, 2012 at 4:31 PM, Nate VanMaren <VanMarenNP at ldschurch.org>wrote:
>
>>  VG224 is not the limiting factor on NSE based standards based (protocol
>> based).  It’s the control protocol, where SCCP can only do NSE, and the
>> others can do standards.****
>>
>> ** **
>>
>> ** **
>>
>> ** **
>>
>> *From:* cisco-voip-bounces at puck.nether.net [mailto:
>> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Ted Nugent
>> *Sent:* Friday, August 31, 2012 2:29 PM
>> *To:* Scott Voll
>> *Cc:* cisco-voip at puck.nether.net
>> *Subject:* Re: [cisco-voip] t.38****
>>
>> ** **
>>
>> Possibly, depending how your vg224s and PSTN gateways are configured...
>> Last I knew VG224 only supports T.38 NSE, not standards based T.38 so be
>> careful of that. Changing the fax protocol should be a coordinated effort
>> between the PSTN gateway and the Analog gateways to make sure nothing
>> breaks.****
>>
>>  ****
>>
>> Here's a good writeup on the supported fax protocols with sample configs.
>> ****
>>
>>  ****
>>
>>
>> http://www.icciev.com/1/post/2011/9/adding-vg224-to-cucm-80-as-sccp-or-mgcp-gateway-differences-and-configurations-part-1.html
>> ****
>>
>>
>>
>>
>>  ****
>>
>> On Fri, Aug 31, 2012 at 3:56 PM, Scott Voll <svoll.voip at gmail.com> wrote:
>> ****
>>
>> I have faxes running through VG224's on my network.  if I turn on t.38
>> support will that brake them?****
>>
>> ** **
>>
>> Thanks****
>>
>> ** **
>>
>> Scott****
>>
>>
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>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip****
>>
>> ** **
>>
>
>
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