"All circuits are busy" when a caller joins the queue

[jamrod]

I have noticed that my users get the "All circuits are busy" message quite often when dialling out. I have noticed that there are only 2 calls at the time of this message and we have 8 channels.

I was able to simulate this by calling the queue and using the "capi show channels" command which shows this:

pbx*CLI> capi show channels
CAPI B-channel information:
Line-Name NTmode state i/o bproto isdnstate ton number
----------------------------------------------------------------
V4BRI-4#02 no Conn I trans *BPS 0x21 '0'->'059766'
V4BRI-4#01 no Conn I trans *BS 0x21 '07880747086'->'059766'
V4BRI-3#02 no Dial O trans *BP 0x00 '07880747086'->'7732'
V4BRI-3#01 no Dial O trans *BP 0x00 '07880747086'->'28'
V4BRI-2#02 no Dial O trans *BP 0x00 '07880747086'->'9732'
V4BRI-2#01 no Dial O trans *BP 0x00 '07880747086'->'24'
V4BRI-1#02 no Conn O trans *BP 0x00 '02086059728'->'02088454118'
V4BRI-1#01 no Conn O trans *BP 0x00 '02086059728'->'02030063790'

I am not clear why a single call into the queue will tie up all the channels. Any help would be appreciated.

 

[blanchae]

Need more info on your outbound route and trunk

 

[jamrod]

I am using ISDN for the trunk. The card is a Dialogic (Eicon) Diva V4BRI. I have 4 channels with 2 lines on each plugged into the card.

Trunks
I have 4 custom trunks setup to use each of the channels. The strings are as follows:
CAPI/V4BRI-1/$OUTNUM$/b
CAPI/V4BRI-2/$OUTNUM$/b
CAPI/V4BRI-3/$OUTNUM$/b
CAPI/V4BRI-4/$OUTNUM$/b

Outbound Routes
I have an outbound route set up to use the above 4 trunks in sequence from 0 - 3

All the settings are the defaults with the Dial Pattern being: 9|.

 

[blanchae]

I wonder if a way to get around this is make the 4 trunks into a group than use the group number as the outbound trunk.

 

[jamrod]

I have been looking online for the syntax to try and create a string so that I can set up a single trunk. I think that this would be the best strategy.

I need to try and identify the Diva card in the string as opposed to the channel or group as it is at the moment. Do you have any ideas how to identify the card?

 

[jamrod]

Does anyone know how I could have a single trunk for the above as opposed to 4 individual trunks?

 

[ddorminey]

may not be relavent, if so, sorry, but...
on my 4port openvox A400p, i have a group called g0 automatically created, or i can reference zap/1, zap/2 individually.

 

[blanchae]

You assign the outbound channels when you create the trunk in /etc/asterisk/chan_dahdi_xx.conf to a common "group=0" number than call the trunk as zap/g0 for example..

 

[jamrod]

I am not using DAHDI for my trunk so I do not have this file available.

 

[jamrod]

Please see below my capi.conf. Should I change the group in all of the controllers below to reflect: group=1 and then set up a single trunk as follows: CAPI/g1/$OUTNUM$/b

; CAPI config
;
[general]
nationalprefix=0
internationalprefix=00
rxgain=1
txgain=1
; If you are in Europe/Australia use alaw. Use ulaw otherwise
alaw=yes
language=en

[V4BRI-1]
;Define CAPI Controller 1 of V-4BRI-8M
;mode=immediate
;isdnmode=DID
;ntmode=yes;
incomingmsn=*
controller=1
softdtmf=1
accountcode=
context=from-pstn
group=1
callgroup=1
echocancel=force
echotail=64
devices=2

[V4BRI-2]
;Define CAPI Controller 2 of V-4BRI-8M
;mode=immediate
;isdnmode=DID
;ntmode=yes
incomingmsn=*
controller=2
softdtmf=0
accountcode=
context=from-pstn
group=2
callgroup=2
echocancel=force
echotail=64
devices=2

[V4BRI-3]
;Define CAPI Controller 3 of V-4BRI-8M
;mode=immediate
;isdnmode=DID
;ntmode=yes
incomingmsn=*
controller=3
softdtmf=0
accountcode=
context=from-pstn
group=3
callgroup=3
echocancel=force
echotail=64
devices=2

[V4BRI-4]
;Define CAPI Controller 4 of V-4BRI-8M
;mode=immediate
;isdnmode=DID
;ntmode=yes
incomingmsn=*
controller=4
softdtmf=0
accountcode=
context=from-pstn
group=4
callgroup=4
echocancel=force
echotail=64
devices=2

 

[blanchae]

I think that may help. I'm not familiar with your capi controller but changing all the groups to a common group number would be a good idea to try.