[Asterisk-Dev] GR-303 support?

[Dave Weis]

On Mon, 14 Jun 2004, Ray Burkholder wrote:
>> On Mon, 14 Jun 2004, Kevin P. Fleming wrote:
>>> Has it been tested in any real-world environments yet? Will
>> it support
>>> redundancy between spans (on a quad-span card, or between
>> two single-span
>>> cards, or even across * boxes)?
>>> More importantly, what is the likelihood that US PSTN
>> providers are going to
>>> be comfortable allowing a, open source, non-certified
>> GR-303 implementation
>>> to connect to their Class 5 switches?
>>
>> It looks like it goes the other direction, to hook a gr303
>> concentrator up
>> to your asterisk machine. It's listed as gr303fxoks.
>
> Does this mean that you can connect Asterisk through a single T1 to a
> multi-T1 mux, and use it to control more than one channel bank with
> FXS/phones?  (Rather than using one to one T1's to match up between T1
> ports on Asterisk and a channel bank, as in not as many T1 ports are
> required in Asterisk, and one T1 port on Asterisk can control more than
> 24 analog phones on multiple channel banks.)
> Is there a GR-303 web site that describes this better and the type of
> equipment that can be used with this?  For example, the Adit 600 has a
> GR303 capabilities.  I'm wondering what functionality, specifically,
> this provides.

Similar, it's like a channel bank for ISDN. Some info is here
http://www.telcordia.com/services/testing/integrated-access/gr/gr303/

You can oversubscribe your t1 ports to run analog phones with it. It 
passes along a CRV, similar to a DID number, that indicates with device to 
ring. There are also cooler boxes like voice over atm and voice over cable 
that also use gr303 to interface with the pstn.

It will be slick when gr303 goes both directions so you can put an 
asterisk box in the middle and buy fewer gr303 ports on your class 5 
switch :-)

dave


-- 
Dave Weis             "I believe there are more instances of the abridgment
djweis at sjdjweis.com   of the freedom of the people by gradual and silent
                       encroachments of those in power than by violent
                       and sudden usurpations."- James Madison