bad recordings: some almost can not hear callee

[thomaslly]

Just here there is an recording issue from our local callcenter customer , want to know if anyone here can help with it.
Let me describe it here,
the callcenter customer run vicidial2.0.4rc3 , for outbound, on a centos 5.2 installation. quad core xeon cpu. the db on another svr
the load averagle is about 2 for vicidial svr, and the load average for db svr is about 1.
outbound trunk is sip over a leased line to an remote site where an asterisk wiht digium card installed for termination.
the issue is, in some of the recordings, but not for all recordings, we can hear the speaking of agent, but the sound volumn of callee is very low, even can not hear what the callee is saying.
but in real talking session, the agent can hear clearly what the callee said, so can finish the call successfully.
the recording is done with monitor application, and bridge into meetme room of agent & callee.
the recording is written to ramdisk temporarily, and every 5 minutes, a script will move it to another archiving & do compressing there , convert it from wav to gsm.

After my research from vicidial forums, it may relate to timer or such, since the vicidial svr rely on ztdummy for timer source. and after I checked, it has no rtc kernel module installed. and ztdummy don't linked to this module.
my further actions to fix this issues would be,
1.recompile the kernel with ztc enabled
2.install tdm card , like x100p, etc, to provide the timing source.
Pls let me know if it's correct or any other actions possible
Regards,
Thomas

[mflorell]

There is another issue that could cause this, we fixed it in 2.0.5.

[thomaslly]

thanks for your reply, matt.

could you please let me know which revision or which part of codes involves this issue fixing ?

so we can merge it back , cause we made customizations for this customer, upgrading is not easy for this site.

[mflorell]

There were several changes in the dialplan, vicidial.php, dvc_db_query.php and manager_send.php that affect this. I can't pinpoint them at this time since it's been quite a while since they were changed.

[thomaslly]

The low volume for callee in recording some days only occur one time, but in other days it may occur more often.

I checked the scripts & dialplan of 2.0.5 , seems not much change regarding recording.
1.in dialplan , changed the recording conf exten prefix, and move 8309 extension to be autogenerated
2.in vdc_db_query.php script , looks like changed hangup logic
3.in vicidial.php script looks like changed linking between recording log table & vicidial log table, this part I have merged already
4.manager_send.php, changed action sending time interval.

not sure which part affect the recording low volumn, could Matt or some othe vici guru here give me more clues?

[thomaslly]

regarding timing part of manager_send.pl script, it's already been employed.

[mflorell]

where does the recording channel connect to to call into the meetme room?

[thomaslly]

I think it's local/786000xx-xxxx

[mflorell]

Is this in your dialplan:

; quiet monitor-only entry and leaving conferences for VICIDIAL (recording)
exten => _58600XXX,1,Meetme,${EXTEN:1}|Fmq

[thomaslly]

we used 78600xxx to replace 58600xxx. after replacing monitor with mixmonitor, sound like things improved, the customer has not reported me any issue regarding the low volume on callee in the recordings , till now.

We'll continue to monitor this issue.

Thanks Matt for your timely response.