asterisk users - May 2004 - dialogic was RE: "Glare" condition - How well does asteriskhandle?

Steven Critchfield <critch@basesys.com> wrote:
__________
>On Wed, 2004-05-26 at 14:23, tpanton@attglobal.net wrote:
>> On which subject, has anyone else 
>> got time to work with me on a chan_dialogicGC ? It looks do-able but I
am ignorant of how asterisk does threading.
>
>Do you have GPL drivers for the dialogic card? Follow previous comments
>about licensing. There is a dialogic driver from Digium for a cost.
Yes, I looked into that. 
I hope I'm not treading on digium's
toes with this....

I think that by using a higher level
dialogic library it should be possible 
to avoid the NDA and licence issues
that intel/dialogic imposed on the low level drivers.
Thats what we have done on the gjtapi project, but I had a major dance getting
the threading right
for that, hence the request for help
on the asterisk threading model.
The really nice thing about using
the higher level library (global call)
is that it should support a range of 
cards with minimal re-writes.

That said, the other strategy, dumping the dialogic and buying digium E1 cards
looks attractive, except that it looks like they wont
work on NTL's PRI here in the UK.

>
>-- 
>Steven Critchfield <critch@basesys.com>

>>I think that by using a higher level
>>dialogic library it should be possible
>>to avoid the NDA and licence issues
>>that intel/dialogic imposed on the low level drivers.
>>Thats what we have done on the gjtapi project, but I had a major dance
getting the 
>>threading right for that, hence the request for help on the asterisk
threading model.
>>The really nice thing about using
>>the higher level library (global call)
>>is that it should support a range of
>>cards with minimal re-writes.
>>That said, the other strategy, dumping the dialogic and buying digium E1
cards looks 
>>attractive, except that it looks like they wont work on NTL's PRI
here in
the UK.

Not to mention that the Digium T1/E1 cards are about 1/5 the cost of
Dialogic's.  That said, it should be noted that the Dialogic cards allow
scaling to a much larger size within one chassis, thanks to heavy DSP
horsepower helping out with the low level chores.

Please tell us more about the problem with NTL implementation with Digium!

Regards
Scott Stingel

Scott M. Stingel
President,
Emerging Voice Technology, Inc.
Palo Alto California & London England
www.evtmedia.com

On Thu, 2004-05-27 at 08:32, tpanton@attglobal.net
wrote:
> Steven Critchfield <critch@basesys.com> wrote:
> __________
> >On Wed, 2004-05-26 at 14:23, tpanton@attglobal.net wrote:
> >> On which subject, has anyone else 
> >> got time to work with me on a chan_dialogicGC ? It looks do-able
but I am ignorant of how asterisk does threading.
> >
> >Do you have GPL drivers for the dialogic card? Follow previous comments
> >about licensing. There is a dialogic driver from Digium for a cost.
> 
> Yes, I looked into that. 
> I hope I'm not treading on digium's
> toes with this....
It won't be just Digium's toes, but all the developers who have
contributed.
> I think that by using a higher level
> dialogic library it should be possible 
> to avoid the NDA and licence issues
> that intel/dialogic imposed on the low level drivers.
> Thats what we have done on the gjtapi project, but I had a major dance
getting the threading right
> for that, hence the request for help
> on the asterisk threading model.
> The really nice thing about using
> the higher level library (global call)
> is that it should support a range of 
> cards with minimal re-writes.
I just went looking around trying to find the license for global call,
best I can tell it isn't open source. From what I notice, you have to
purchase a Service Level Agreement to see the license.

This all said means that you will be violating the GPL if you then link
asterisk to global call. Only Digium has the right to allow such
linking. They have been given this right by all of the contributers who
have given Digium the right to use their contributions that way. 

> That said, the other strategy, dumping the dialogic and buying digium E1
cards looks attractive, except that it looks like they wont
> work on NTL's PRI here in the UK.
Maybe the time and effort would be better spent finding out why the
Digium card won't work on the NTL's PRI and either fixing it or
providing the information and testing facility to someone who can.
-- 
Steven Critchfield  <critch@basesys.com>

At 09:16 27/05/2004 -0500, you wrote:
>Maybe the time and effort would be better spent finding out why the
>Digium card won't work on the NTL's PRI and either fixing it or
>providing the information and testing facility to someone who can.

NTL's PRI uses ISDN 85  not q931 so a ne protocol stack would need to be 
written.


Jason