Unable to make Conference calls

[akhan]

I know this has been covered a few times, I read all the related post and still could not solve my issue. When trying to initiate a conference call, I dial the first number press the conference button dial the other number. while having both parties on the phone I am unable to join the calls. I get the two options to release me and trade calls but pressing the conference hard button button does nothing. I have a 5330. On a side note I have sip trunks and yes I did check the cos and yes I did check the maximum co trunks conference, as specified in the other related post. Please help.

[ralph]

Next check your interconnect restrictions (and maybe tenanting) to see if trunks are restricted from each other.

Ralph

[akhan]

I checked the interconnect restrictions and there are no restrictions on any trunks. Also we are not using tenanting.

[ralph]

I'm assuming that when you say you checked the COS, you checked both the trunks and the stations.

How about this:  In COS is Brokers Call turned on.  Shouldn't be.   
Secondly, in all COSs (Phones and trunks) is Public Network to Public Network connections allowed?

Ralph

[akhan]

Yes I did check both the stations COS and the trunks COS. Brokers call is set to off also public network to public network is allowed.

[njsm34]

try with different handset if possible

[akhan]

I did I tried multiple handsets, I even tried the console. All failed

[bluewhite4]

In your test, are all three phones internal extensions?

If not, out of curiosity, are you able to transfer an incoming call to an external party?

[akhan]

Yes I can transfer incoming calls to an external party. All three phones are internal extensions. I called my DID and I was able to hit the trans/conf button dial my cell number and release the call. All that works fine but conferencing does not.

[LoopyLou]

Sorry just to be clear. You are unable to create a conference made up of three internal phones on a 3300 ( was confused by mention of SIP trunks )? Futher question are the three phones all IP, which 3300 controller, how many E2T channels is it equipped with.

[akhan]

I am on one phone, I pick up the handset dial the first number then press the trans/conf button I get the second dial tone dial the second number. I establish both calls but I am unable to join the two parties. All phones are ip phones. Also when trying to initiate a conference call in house with three extensions its also failing. The add held button pops up but it does not work when its pressed. Its not the E2T because it was working a while ago but we recently had a personnel change and I am trying to figure this out.

[LoopyLou]

Call swap on in the COS? Or is that what you are calling brokers call?

[ralph]

it used to be called "Brokers Call".  Maybe it's changed now to "Call Swap".

Ralph

[v2win]

Can you conference 3 internal phones?

[akhan]

No I can not conference 3 internal phones.