Greetings. Anyone have any recommendations for studying for the dCAP Certification? Other than the expensive digium courses, there doesn’t seem to be anything online.

Thanks,


Michael Gilleran

Hi,

We have an asterisk box with Digium 4xE1 card running libss7. All is well, except for a CDR issue about incoming calls whose DNID (local numbers) are not valid.

In the dialplan, we do a check if the incoming call has a particular prefix for DNID. If it does not, then we hangup the call with 403 or 404, as applicable. For these calls, no “lastdata” is recorded. What we understand is, this is perhaps the desired behaviour, as the “lastapp” was
“Hangup” and not “Dial”.

What would be the strategy to correctly store the incoming number for these calls?

Regards

HASSAN

Hi, I’m curious what chip Digium is using in the latest TDM400 cards. Specifically, to my recollection, they used to use the Tigerjet 320G, however somewhat recently, Tigerjet was bought out, and now the 320G is no longer produced.

Maybe a better question is: is there a way I can take the latest DAHDI
source and get a list of supported chipsets from it?

Thanks.

MCH

There appears to be a disagreement between the encoding given in the sources for Siren14 that are downloaded from Polycom (and the ITU, both are the same) and that implemented by codec_siren14.so. The latter agrees with the actual device.

If I make a .sln32 file and run the encoder from ITU/Polycom with

encode 0 foo.sln32 foo.siren14 48000 14000

the resulting file doesn’t play back correctly with the Digium’s siren14
codec. I know the parameters are correct because the file is the same size as that made by the Digium codec.

Both sets of decoders/encoders (Digium and Polycom/ITU) are symmetric and can decode what they encode, but neither can read the encoding of the other.

Is there some subtle difference between G.722.1C and Siren14?

I have the following scenario. A small network has DHCP but does not publish option 66. An Asterisk server is on the network, but the Asterisk version does not support DPMA and it is hard to switch the version. However, there is a possibility to have a web server and an mDNS (Avahi) server. I have been reading about provisioning Digium phones without DPMA, and it mentions that option 66 can specify the URL prefix to use for the XML configuration. Is there a way to specify the same through Avahi mDNS?
Something along the lines of this (of course this does not work, but gives an idea of what I am looking for):




Digium Phone Configuration Server

_digiumproxy._udp