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Cannot make a conference in UC520 (inside conference)

umartina01
Level 1
Level 1

Hi everyone.

After begin I want to tell you that I´m a newby.

I can make the calls mix (conference).  All  telephones show in the screen "cannot complete conference" and put  the  call on hold and open a new line.

I try removing the "conference hardware" and nothing.

I have an UC520.

voice class codec 1

codec preference 1 g711ulaw

codec preference 2 g729r8

!

voice class custom-cptone leavetone

dualtone conference

  frequency 400 800

  cadence 400 50 200 50 200 50

!

voice class custom-cptone jointone

dualtone conference

  frequency 400 800

  cadence 400 50 200 50 200 50

voice-card 0

dsp services dspfarm

ephone-template  1

softkeys hold  Join Newcall Resume Select

softkeys idle  Redial Newcall Cfwdall Gpickup Pickup Dnd Join RmLstC

softkeys seized  Endcall Redial Meetme Cfwdall Pickup

softkeys connected  Hold Endcall Trnsfer Confrn ConfList Join Park RmLstC Select

sccp local Loopback0

sccp ccm 10.1.1.1 identifier 1 version 7.0

sccp

!

sccp ccm group 1

associate ccm 1 priority 1

associate profile 1 register confprof1

!

dspfarm profile 1 conference 

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec g729r8

codec g729br8

maximum sessions 2

conference-join custom-cptone jointone

conference-leave custom-cptone leavetone

associate application SCCP

ephone  6

conference drop-mode creator

conference add-mode creator

conference admin

device-security-mode none

description Ulima

mac-address 0025.84A2.E98E

ephone-template 1

type 7942

button  1:6

........................................

TUC520#sh voice dsp group all

DSP groups on slot 0:

dsp 1:

  State: UP, firmware: 26.8.1

  Max signal/voice channel: 16/16

  Max credits: 240

  num_of_sig_chnls_allocated: 10

  Transcoding channels allocated: 0

  Group: FLEX_GROUP_VOICE, complexity: FLEX

    Shared credits: 225, reserved credits: 0

    Signaling channels allocated: 10

    Voice channels allocated: 1

    Credits used (rounded-up): 15

    Voice channels:

      Ch01: voice port: 0/4/0, codec: g711ulaw, credits allocated: 15

dsp 2:

  State: UP, firmware: 26.8.1

  Max signal/voice channel: 16/16

  Max credits: 240

  num_of_sig_chnls_allocated: 0

  Transcoding channels allocated: 0

  Group: FLEX_GROUP_CONF, complexity: CONFERENCE

    Shared credits: 0, reserved credits: 240

    Codec: CONF_G729, maximum participants: 8

    Sessions per dsp: 2

  0 DSP resource allocation failure

My phones are 7975 and i configure the octo-line

Thanks to all

2 Replies 2

acampbell
VIP Alumni
VIP Alumni

Hi

I see from your config

sccp local Loopback0

sccp ccm 10.1.1.1 identifier 1 version 7.0

sccp

Can the IP phones ip route to this loopback0 address ?

Regards

Alex

Regards, Alex. Please rate useful posts.

Hi Alex.

That loopback is the one that the phone used to register.

ip dhcp pool phone

   network 10.1.1.0 255.255.255.0

   default-router 10.1.1.1

   option 150 ip 10.1.1.1

!

interface BVI100

description $FW_INSIDE$

ip address 10.1.1.1 255.255.255.0

ip access-group 101 in

no ip redirects

no ip unreachables

no ip proxy-arp

ip nat inside

ip virtual-reassembly

Thanks

Ulises

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