[Freeswitch-users] mod_distributor configuration advice

Tue May 6 02:29:19 MSD 2014

Victor,

Thanks for the suggestions.  I guess I should add the reason why I am doing this.

I want to avoid the possibility of a race condition of an outbound call hitting a TDM channel that was just released.  I am trying to ensure that I do not encounter this "glare" condition that can exist as I am using RBS/CAS T1's.

Maybe there is a better way to do this than channel grouping and mod_distributor.

Regards,

Brian

?  From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Victor Chukalovskiy
Sent: Monday, May 5, 2014 5:31 PM
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] mod_distributor configuration advice

?  I suppose you call distributor 3 or 5 times and use "|" when bridging e.g:

<action application="bridge" data="{ignore_early_media=true}freetdm/${distributor(outbound_rr)}/1/a/1$1|freetdm/${distributor(outbound_rr)}/1/a/1$1|freetdm/${distributor(outbound_rr)}/1/a/1$1"/>

Note 1: keep in mind that distributor does not randomize, but simply moves a pointer one step each time it's called. So for the best results you need to have even sum of weights in the distributor list and call it odd number of times from the diaplan. Or to be more precise,  M and N should not have a common divisor other than 1 :) where M is a sum of weights in the list and N is the number of times you call distributor(list) it in the dial-plan.

I think that mod_distributor is lacking "randomize" logic big time! Keeping track of what is dividable by what is not trivial.

Note 2: I'm not sure if {ignore_early_media=true} should be repeated after "|". Suggest to test or check WiKi.

Note 3: fail_on_single_reject should be set before bridge to avoid failing over on "USER_BUSY", "UNALLOCATED_NUMBER" etc.

Cheers,
-VIctor

On 14-05-05 02:22 PM, bedgar at vseinc.com<mailto:bedgar at vseinc.com> wrote:

?  Update:

?  So I figured out how to use this module to cycle through the channel groups.

?  Snippet from distributor.conf.xml:

?  <list name="outbound_rr" total-weight="4">

?  <node name="t1_1_1" weight="1"/>

?  <node name="t1_1_2" weight="1"/>

?  <node name="t1_1_3" weight="1"/>

?  <node name="t1_1_4" weight="1"/>

?  Snippet from dialplan:

?  <action application="bridge" data="{ignore_early_media=true}freetdm/${distributor(outbound_rr)}/1/a/1$1"/>

?  Follow-up question:

?  If the channel group is fully utilized when it is comes around in list how can I get the outbound call to use the next group in the list.

?  Example:

?  Node name t1_1_2 is slated to be used in the list for the next outbound call but there are no available channels in that group.  How can I get it to try the subsequent group or groups in the list until an available channel is realized?

?  The third item from my posting is still an open question:

?  3.  If a group that is next to be used based on the weight ends up in a down state, as an automatic remedy, how could that group be excluded?

?  Thank you,

?  Brian

?  From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Brian Edgar
Sent: Friday, May 2, 2014 2:38 PM
To: freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>
Subject: [Freeswitch-users] mod_distributor configuration advice

?  Good Day FS Users,

?  I am looking to utilize mod_distributor to round robin my outbound through TDM.  I have multiple 4-port Sangoma cards.  Some spans are dedicated to inbound trunks from my provider and some spans are dedicated to outbound.

?   I wanted to group my spans and reference these groups in mod_distributor.  Is this possible?

?   If so, what would be the syntax in distributor.conf.xml?

?   In addition, if a span or group that is next to be used based on the weight ends up in a down state, how could that span or group be excluded as an automatic remedy?

?  Thank you,

?  Brian

?

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