I’m a new asterisk user (though I’ve worked on telephony platforms in the past) and wanted to do some simple ivr/voicemail at home - connected to a SPA3102 gateway.
I already have a windows home server running 24x7 albeit with a lowly 2.? Ghz celeron & 2GB ram (HP EX490).
As a starting point I downloaded asterisk-now 2.7 & installed under the latest version of virtualbox. The install was smooth & within an hour or so I had everything up to date with v2.9 including freePBX, and a few simple extensions configured with a couple of sip clients. (no SPA3102 integration yet - later!)
However I’m getting audio breakup in prompts such as speaking clock & other menus. Glitches rather than large gaps.
The VM currently has USB, vnc disabled & is set to 256MB ram. The host is running at low CPU before virtualbox is started. Once asterisk is running the guest cpu is reporting idling at a ~3% cpu but oddly the virtualbox process is running around 50% cpu (and has reached 80). Networking is bridged to a local gigabit ethernet adapter (clients are either on the gig.E or via a 802.11n wireless connection)
I’ve tried setting the process to high/realtime, and enabling host I/O caching – but this made no difference. I’ve also added “divider=10” in the guest kernel config, though haven’t yet installed the vb tools. I’ve tried making the virtual disk solid state (in case there’s an I/O performance issue here). Having done all this the host virtualbox is now running at < 10% cpu (usually around 5% idle, 8% busy), and the guest remains running at a few % even when playing prompts
However the audio stutters remain
Any ideas on tweaks to configuration? I was wondering if there are scheduling issues with virtual box. Should I try vmware? or another virtualization tool? Do I need to give up and try finding a native windows port (unlikely for current asterisk versions, and much longer to get working), or give up totally and/or find a box to run it on (rasperry pi good enough I wonder? !)
I do also have a jogger, which could run native – and some old routers running ddwrt, but unlikely they have enough ram. Or a nokia n900 handset - but wouldn’t want to have network dependent on a mobile…