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PBX Conference still choppy after adding VoiceTime USB Sync

Posted on 2010-11-16
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Last Modified: 2012-05-10
I just acquired a VoiceTime USB Sync device to improve timing and fix choppy issues with my conference center.  I'm on Elastix 1.3-2 Asterisk 2.6.0.0, zaptel-1.4.12.1 with no analog hardware.


Following the install wiki - http://wiki.sangoma.com/sangoma-wanpipe-voicetime#install I installed the wanpip voicetime driver  ver 1.0.9.  Since I already had zaptel on the system I bypassed that portion of the instructions.  I've rebooted the server, and everything I check in the debugging sections is in the affirmative, except the zttest.

My latest test:

zttest -
8192 zaptel samples in 18813.473 system clock sample intervals (229.657%)
8192 zaptel samples in 15768.512 system clock sample intervals (192.487%)
8192 zaptel samples in 19017.930 system clock sample intervals (232.152%)
8192 zaptel samples in 20391.504 system clock sample intervals (248.920%)
8192 zaptel samples in 20032.729 system clock sample intervals (244.540%)
8192 zaptel samples in 16886.191 system clock sample intervals (206.130%)
8192 zaptel samples in 20483.695 system clock sample intervals (250.045%)
8192 zaptel samples in 20481.664 system clock sample intervals (250.020%)
8192 zaptel samples in 17031.096 system clock sample intervals (207.899%)
8192 zaptel samples in 19518.225 system clock sample intervals (238.260%)
8192 zaptel samples in 20495.441 system clock sample intervals (250.188%)
8192 zaptel samples in 20582.768 system clock sample intervals (251.254%)
8192 zaptel samples in 18766.705 system clock sample intervals (229.086%)
8192 zaptel samples in 18169.096 system clock sample intervals (221.791%)
8192 zaptel samples in 20601.721 system clock sample intervals (251.486%)
8192 zaptel samples in 20564.104 system clock sample intervals (251.027%)
8192 zaptel samples in 20545.695 system clock sample intervals (250.802%)
8192 zaptel samples in 20517.344 system clock sample intervals (250.456%)
8192 zaptel samples in 20675.127 system clock sample intervals (252.382%)
8192 zaptel samples in 20618.904 system clock sample intervals (251.696%)
8192 zaptel samples in 20607.721 system clock sample intervals (251.559%)
8192 zaptel samples in 20602.408 system clock sample intervals (251.494%)
--- Results after 35 passes ---
Best: 7.513 -- Worst: -52.433 -- Average: -37.578284, Difference: 237.578285

and it is still choppy, as if the usb isn't there.

lsusb shows the USB on a port:
Bus 002 Device 003: ID 10c4:8460 Cygnal Integrated Products, Inc.

dmesg |grep USB turns up:

usb 2-2: new full speed USB device using uhci_hcd and address 3
Wildcard USB FXS Interface driver registered
wanpipe_voicetime: Loading WANPIPE VoiceTime (USB) Driver - v1.0.9
wanpipe_voicetime: Probing WANPIPE VoiceTime (USB) device on 3 ...

Other resource used:
http://help.fonality.com/Troubleshooting/How_do_I_install_a_Sangoma_VoiceTime_USB_Device%3F 

All Ideas and suggestions are appreciated.

Dylan
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Question by:dpedersen13
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dpedersen13 earned 0 total points
ID: 34288668
Fixed it!

Timing issue was with the IRQ, kept getting stepped on.  So I did two things -
1. turned off everything extraneous in the bios - parallel, serial, audio, core stepping power management
2. experimented with the ACPI and PCI settings.  those caused a conflict, but adding irqpool to grub.conf on the kernel line fixed it!

2 great sources that helped me figure it out:
http://ubuntuforums.org/showthread.php?t=354412
https://help.ubuntu.com/community/BootOptions

Wish I could have got ACPI to work so everything would have their own IRQ, but this solves it so I'm happy.
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