Thanks Iona, Gene and Darrick for responding to this thread.
The symptoms I have are noise and crackling whenever the other person
speaks, and occasional,random beeps. Echo is not really a problem after
the first couple of seconds. However, it is not a nice experience. I had
a 2 hour conference call today and decide to plug in a POTS phone instead.
1) zttest result was :
-- Results after 29 passes ---
Best: 99.986 -- Worst: 99.977 -- Average: 99.983030, Difference: 99.983030
2) However I cannot stop the NIC sharing an interrupt with the TDM400. I
have tried disabling all the usual onboard devices (COM, parallel, USB)
but to no avail. I am using a Neoware E140 which has just one PCI slot.
I have tried using not-Auto IRQ allocation in the BIOS, without any
change to the IRQ allocation. I have tried to reserve the IRQ setting
where the two devices are sitting - all that happens is that they both
move to the next free one. I have tried disabling the NIC in the BIOS,
rebooting and then enabling it again. Once again both devices end up on
the same IRQ. /proc/interrupts shows :
CPU0
0: 2671645 XT-PIC-XT timer
1: 2 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
9: 0 XT-PIC-XT acpi
11: 2639275 XT-PIC-XT wctdm, eth0
12: 3 XT-PIC-XT i8042
14: 117115 XT-PIC-XT ide0
NMI: 0
LOC: 0
ERR: 0
MIS: 0
3) Note that despite setting the opermode to UK it is NOT being picked
up by the system. In /mnt/kd/rc.conf I have the following line
MODOPTS="wctdm:opermode=UK"
..
..
and then a bit later
..
..
ZAPMODS="wctdm"
After rebooting, the /etc/rc.conf autogenerated file shows
MODOPTS="wctdm:opermode=UK"
However after a restart I find this :
/sys/module/wctdm/parameters/opermode ="FCC"
I reported this problem a few months back on an interim build in this
forum, but I am now using 0.6.2 and thought that this had been resolved.
This is all a bit of a mess. Any suggestions on how I can resolve this
appreciated.
Thanks
Mart
Darrick Hartman wrote:
> The easier but maybe more expensive solution is to use a Rhino card.
> The new Digium cards do appear to be much better than the ones with the
> Tiger Jet chipsets.
>
> Darrick
>
> Gene Cooper wrote:
>> Hi Martin,
>>
>> I'm no expert, but here's my $.02 worth... I have had good luck with
>> Digium cards. These days I usually buy the AEX800 w/ HW EC.
>>
>>> I have been using a TDM400 with 2 FXO cards for over a year but am
>>> disappointed in the quality.
>> First off, and don't discount this, make sure the card has its own IRQ.
>> This can be a PITA with cheaper mainboards too. Try changing slots
>> and disabling integrated features you may not need, like serial ports or
>> parallel ports or audio hardware, etc.
>>
>> Use fxotune. Here's a link:
>>
>> http://www.voip-info.org/wiki/view/Asterisk+fxotune
>>
>> Here's another link that may help:
>>
>> http://www.mattgwatson.ca/2008/05/howto-tune-zaptel-dahdi-fxo-interfaces-on-asterisk-pbx/
>>
>> IHTH,
>>
>> G
>>
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