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Firstly, We have finally installed the new firewall and in the process moved the email server and shared samba drives to another VM. This now means all servers except for Asterisk are on the VMware server at last.
And finally its nice to be proved right sometimes, A recent new install was plagued with Yellow ISDN alarms, These mean that teh exchange is having issues receiving our d channel messages. Simple you would think tell the PTO and they will fix it, Not so, We got the usual "Its your equipment" brushoff, But We have ISDN testers so we went to site with a Spare Asterisk server with ISDN cards and our Trend ISDN tester. We again tested the circuit and the fault was still proving to be a PTO issue and we then put the spare server in circuit and the fault continued.
The PTO now had no get out and when they came to site, and tested the line it was proved to be "at the limit" of acceptability, They tried to improve the line but this made little difference. Finally the relented and have this week installed a fiber link to the site and since then no alarms or dropped calls.
The lesson to be learned from this is, To be taken seriously by the PTO you must be able to prove your hunches and carry the correct test equipment.
TTFN |
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The interconnecting of the two worlds of SIP and Skype has always been a difficult thing to achieve.
But The Gizmo project has now made this a simple and straight forward job. Its called Opensky and allows you to make SIP calls to their gateways and then out to the Skype user. You can test for free and then get an account if you like the service.
Intergrating this into Asterisk is a simple as setting up a normal SIP peer. The only hard bit is how do you dial the skype address. You can set alias's in your Gizmo account, or you can do as we do and use the Asterisk internal database. |
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Digium have announced new versions of the G729 codec.
The new modules were built using the latest (4.3) release of the GNU C compiler, and use a number of new optimization methods available in that release to significantly improve encoding/decoding performance. In addition, we now build the modules in both 32-bit and 64-bit varieties for each CPU flavor that support both modes, so that users with 64-bit CPUs running a 32-bit Linux installation can still have a version of the module optimized for their CPU type. GCC 4.3 also provides optimizations for some newer CPU families (Intel Core2, AMD Barcelona, and others), so we’ve made those flavors available with this release.
Also a test tool has been released to cut the guess work as to what will be the best version to run,
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"In the past, we’ve offered different CPU flavors of the module to hopefully provide the best encoding/decoding performance, but it was up to the user to install and test each flavor to determine which one provided the best performance. This process is difficult and time consuming, and did not always provide reliable results. To help with this situation, we’ve now released a tool called ‘benchg729′, which can be run on the target system and will execute encoding speed tests (using a real audio sample) for each CPU flavor that we offer for that platform, and then report the results and suggest the best performing module flavor for that system. Note that the use of this tool requires that the system have at least one valid channel license for the Digium G.729 codec installed; it will not run without a license."
Full details are on Digiums site at http://blogs.digium.com/2009/02/06/digium-g729-codec-module-updated-and-new-performance-testing-tool-released/
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