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CUCME conference problem

Hi! I'm facing a weird problem - unable to setup the hardware ad-hoc conference on cucme 7.0.

The only symptom is that when the second phone number is dialed and the conf soft-button is pressed for the 2nd time busy tone is received and ip communicator displays "->5801" and "busy" down on the screen (call status). 5801 is the first of 4 ephone-dns created for hw conference.

When simply dialing this number the call status is something like "unable to set up a conference" (russian locale, not the exact text).

When testing I used CIPC and dialed first the mobile phone through analog lines to phone service provider (successfully) then

pressed conf button and dialed external phone number through voip peer (also successfully) and pressed conf button 2nd time.

The same scenario was tested on local hard ip phones with the same result, so I don't think the issue is related to tall-fraud protection mechanisms

or something like that.

The dspfarm profile is successfully associated:

####################

C2821#sh dspfarm profile

Dspfarm Profile Configuration

Profile ID = 1, Service = CONFERENCING, Resource ID = 1

Profile Description :

Profile Service Mode : Non Secure

Profile Admin State : UP

Profile Operation State : ACTIVE

Application : SCCP   Status : ASSOCIATED

Resource Provider : FLEX_DSPRM   Status : UP

Number of Resource Configured : 2

Number of Resource Available : 2

Codec Configuration

Codec : g711ulaw, Maximum Packetization Period : 30 , Transcoder: Not Required

Codec : g711alaw, Maximum Packetization Period : 30 , Transcoder: Not Required

Codec : g729ar8, Maximum Packetization Period : 60 , Transcoder: Not Required

Codec : g729abr8, Maximum Packetization Period : 60 , Transcoder: Not Required

Codec : g729r8, Maximum Packetization Period : 60 , Transcoder: Not Required

Codec : g729br8, Maximum Packetization Period : 60 , Transcoder: Not Required

#########################

The dsps seem to be used when the conference attempt is made:

while ->5801 busy

is displayed:

########################

C2821#sh dspfarm all

***omitted part***

 

SLOT DSP VERSION  STATUS CHNL USE   TYPE    RSC_ID BRIDGE_ID PKTS_TXED PKTS_RXED

0    5   23.8.5   UP     1    USED  conf    1      0x3C2       886       886   

0    5   23.8.5   UP     1    USED  conf    1      0x3C3       888       883   

0    5   23.8.5   UP     N/A  FREE  conf   1      -         -         -

Total number of DSPFARM DSP channel(s) 2

####################

After it has aged out and soft phone is not on call:

#########################

C2821#sh dspfarm all

Dspfarm Profile Configuration

***omitted part***

 

SLOT DSP VERSION  STATUS CHNL USE   TYPE    RSC_ID BRIDGE_ID PKTS_TXED PKTS_RXED

0    5   23.8.5   UP     N/A  FREE  conf   1      -         -         -

0    5   23.8.5   UP     N/A  FREE  conf   1      -         -         -

Total number of DSPFARM DSP channel(s) 2

####################

No errors or any console messages are printed when term mon is turned on.

What could cause this behaviour?

I'm almost sure it worked when I was testing the system and I thought it could be COR-related issue. But I tried to remove corlists from affected

peers and dns or assign different in and out lists to a block of conference dns with no success.

Box is cisco2821, sw is 12.4(20)T4 adv. ip services, cucme is 7.0(0), phones firmware is 8-3-3S and 8-4-2S (doesn't affect the case as I expiriment on CIPC), CIPC version is 2.1.3.0.

Almost complete config is in attachment.

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