I have connected Trixbox to our Alctatel 4400 PBX using an Openvox D110P PRI card using an ISDN crossover cable directly to a PRI card in the 4400. The first build was on a Dell Poweredge 1650 and the audio quality was awful from the Alcatel side. So I changed the server for an old PIII server that was spare. That cleared all the noise on the line, but Im getting audio dropouts on the ISDN 30 link between the 4400 and Trixbox, and also modem-style noise in the gaps between being able to hear people talking.
Originally it was just the gaps which I thought was because the Pri card was sharing an IRQ with other devices, so I have changed that in the bios and my IRQ listing is now as below which caused the modem-style noises to start as well!
cat /proc/interrupts
CPU0
0: 1344306 XT-PIC timer
1: 2 XT-PIC i8042
2: 0 XT-PIC cascade
3: 89282 XT-PIC uhci_hcd:usb1, eth0
5: 8082 XT-PIC aic7xxx
6: 3 XT-PIC floppy
7: 1283066 XT-PIC wcte11xp
8: 1 XT-PIC rtc
9: 1 XT-PIC acpi
10: 0 XT-PIC uhci_hcd:usb2
11: 15 XT-PIC aic7xxx
12: 4 XT-PIC i8042
15: 11426 XT-PIC ide1
NMI: 0
LOC: 1344369
ERR: 0
MIS: 0
During this dropouts the CPU usage is ~5%. This definately isn't a network/SIP issue as the problem occurs from the Alcatel phones to TB voicemail which shouldn't involve any phones. Is there any way I can resolve this, or clues on how to troubleshoot?
Also, can someone clarify what constitutes a hardware timing source? I take it from the accuracy Im getting (99.97%) that the D110p card doesn't act as a hardware timing source? Nor it seems does the A400 card I have in a different server.
Member Since:
2008-07-07