Conference calls technical issues

Hi. I wonder if you can help me. My question and issue is perhaps better dealt with via phone, however, I can give it a shot here: I make group calls from my second account. We have a process whereby the host for the call rotates every week (on average).
Last couple of times someone else made those conference calls, we had a lot of technical difficulties, dropped calls, muted sharing, disconnections and such.
Why is this happening? How can we overcome our challenge?
Thank you in advance for your support.

If asking for help you need to provide full details and not just the problem.
Call control agent?
version?
If CUCM, SW CFB/HW CFB?
By what you mention it sound like codec issues, so start looking into that in first place.
HTH
java
if this helps, please rate
www.cisco.com/go/pdihelpdesk

Similar Messages

Droid Incredible won't Conference Call - VZW Area Supposed Known Issue

My Droid Incredible won't connect when you try to add in 2nd call. No one in my area can conference call with their Droids...not even the VZW Store Droid demo models or the reps there who have the Incredible. My friends have tried conference calling with their Droid's with no luck as well. VZW tech says its a known issue, and until Verizon pushes out update to our area - I'm out of luck! The rep said my options are that they can replace my phone with a different phone model or of course I can break my contract. Really? You want me to go to Apple and get your competitor's Iphone?

With the Droid Incredible I do not have the SEND option once I am connected to the first party. I just have the END CALL button on my screen. I just got off the phone with Customer Service who reviewed the Tech support notes and she said according to the Ticket the issue is my area, and the way the Droid's are designed to conference call. The work around in my area is to hit SEND twice to connect the 2nd party, however she did state, as I can observe, that the Droids do not have the option to hit send on a 2nd call. My friend has a Droid X in my area and he too is unable to conference call. According to trouble ticket they cannot do anything for me. I am out of luck and my only option is for VZW to give me a new model phone, well we all know the only comparable phone is the Droid X which won't help me as it can't conference call either. With what I do, I need to be able to conference call and if I pay $300 for a phone with the feature, I expect Verizon to accomodate me so this just boggles my mind why Verizon isn't working hard to address this issue. So the only other alternative I see is to break contract and move to AT&T and get the Iphone, but I really do love my Incredible so this is a hard decision. Why is Verizon not working to address this issue? Who can I talk to???

Note 4 - Calling waiting/conference call issues

Is this a defect in the new note? I am in able to end calls when answering a call (i.e. call waiting/conference calls). The other person can hang up but my phone will still say they are on hold. Which on turns holds up my free line.
I find this rather annoying. Will this problem be corrected in an update?

Did you get a response on this from Skype?
Regards
Bill

Dropped conference call issue!

Dear All;
I have cucm 8.5 and h323 GW (2911) with many FXO port , I have used a software conference bridge and I can make internal conference call only ;
my problem is: when I dial out side number via H323 GW the call is esablished, and when I press the conferece softkey button on IP Phone to start another call the call also established successfully , but when i press the conf button again to add the call to the conference , the call became dropped immediatly .
Please Advise me to solve this problem , does I need to create harware conference bridge also.
Thank you.
Rashed.

Dear javalenc;
thank you for replying, but how can i check if i did everything for g711 ?
woulld you please provide me steps to check.
thank you.

Droid X-conference call-caller hold issues???

Here is exactly what is going on:
I call Hubby 1st call and he answers
If I click dial pad instead of add call it only gives me the choice to end call on the dial pad instead of send I click add call then dial my home 2nd call click on green phone to send
I can hear him talking while it shows connecting/connected In Call but after a minute still no ring at all....it also shows merge call.
I tried the merge call but nothing changes...during this I can still him talking.
If I click the dial pad instead of the add call the only option is to end call. Should I be able to hear him? It is like the 1st call stays active it never goes on hold.
Thanks, Angie

I copy and pasted the following from my Droid X User Guide. It was on page 11.
Conference calls
To start a conference call, call the first number. After
the call connects, touch
Add Call. Dial the next
number, or select it from contacts or favorites. When
the next number answers, touch
Merge calls.
Tip:
Before merging, you can switch back and forth
between the two calls by touching
Switch calls.

Conference call using Skype to go number

I set up two Skype to go numbers to India. When it try to conference these numbers it says "Sorry we just had a Technical Problem". Can't we make conference call using Skype to go number?

shalltoji wrote:
Should I call it through the country code or plain?
Hello,
You must always prefix your dial string with the international country access code (+1 for USA, +44 for UK etc.).
TIME ZONE - US EASTERN. LOCATION - PHILADELPHIA, PA, USA.
I recommend that you always run the latest Skype version: Windows & Mac
If my advice helped to fix your issue please mark it as a solution to help others.
Please note that I generally don't respond to unsolicited Private Messages. Thank you.

Unable to diall corparate tollfree conference calls

Please help with case. Issue description is as follows.
1. My Z10 handset and my airtel SIM together - unable to dial conference calls that start with 000 800 ** ****
2. My airtel sim in another handset, works
3. Another SIM in my Z10 Handset works.
Any help is appreciated.

Hey vattokutraj,
Welcome to the BlackBerry Support Community Forums.
Thanks for the question.
This issue can be resolved by your network service provider. I would suggest getting a new SIM card from airtel.
Let me know if you have any more questions.
Cheers.
-ViciousFerret
Come follow your BlackBerry Technical Team on Twitter! @BlackBerryHelp
Be sure to click Like! for those who have helped you.
Click Accept as Solution for posts that have solved your issue(s)!

Why my iPhone wont let me add to conference call or hang up on a particular person?

Why my iPhone wont let me add to conference call or hang up on a particular person?

Hey D.j.,
Welcome to the Apple Support Communities. The following article will go over the Conference features and will provide some help.
iPhone: Using Conference
http://support.apple.com/kb/ta38608
If you continue to have issues with the Conference feature, the next step would be to reset settings or backup and restore the device and setup as new. To reset settings on the device: Settings > General > Reset All Settings
If you need to restore your iPhone, the following article will assist with this.
iOS: How to back up your data and set up as a new device
http://support.apple.com/kb/HT4137
Regards,
-Norm G.

HI I have an Iphone 3GS and the microphone jack works when I play music but not when making phone calls. please help as I use it for conference calls

Hi I use my phone for conference calls and use the microphone jack to connect to speakers. It doesnt work when making phone calls but when i play music on the phone the jack works with the external speaker.

Happy to have been of help. Hope all goes smoothly.
BTW, for the sake of others who may help you here, it's usually most polite if you mark the post that answered your question as being the one that "solves" it, not your own post. That's how people get points here, if a questioner marks their post as either "helpful" or "solving". It's not an issue for me, but for those just starting out in the forums it may be important to them. See:
https://discussions.apple.com/static/apple/tutorial/mark.html
and
https://discussions.apple.com/static/apple/tutorial/reputation.html
Regards.

Problems with conference calls(adding and merging calls) after upgrade to ios 8.1.2 on iphone 5s

I am having weird problem intermittently with adding calls or merging them or swapping them. The issue happens 8 out of 10 times whenever I try to do a conference call. This issue came up after I upgraded to 8,1.2. Never experienced this in 8.1.1 or previous version.
Some of the scenarios that I have experienced is:
1. While on the call, when I try to add a new contact, it just doesn't dial the second number.
2. Sometimes the second number gets dialed, cannot merge the calls.
3. After talking to the second person, cannot go back to the first call.
I am very sure that this is not a carrier issue as it worked flawlessly before upgrade.
Anyone experienced this before? Any suggestions?

Thanks for the above infromation. I did a complete restore of my iphone through iTunes connecting it to my computer via cable. iOS8.1.3 was re-installed. I then added back my settings and data which were backed up prior to restoring the phone. I still have the same issue with conferencing and adding a third caller. When I hit the [+] box, the existing caller is not put on hold. The phone appears to be making a call but it is not dialing to the 3rd party. Shortly thereafter, the Merge icon appears but there is no active call to merge with. I have tried this several times using my wife's iPhone and our home phone to set up a 3-way call. I know it is not working because the 3rd phone (our home phone) does not ring. Is this a hardware problem? My wife's iPhone 6 works with no problem and was purchased the same time I purchased my iPhone 6. Probably time for a visit to the Apple Store unless there is another solution.
iPhone 6; iOS 8.1.3; Carrier: Verizon

CONFERENCE CALLS DONT WORK ON OS 7 ALONG WITH RESPOND WITH TEXT WHILE ON A CALL

BEFORE UPDATING MY IPHONE 5 TO OS 7, I COULD MAKE OR ADD ON UNLIMITED CONFERENCE CALLS.
IMMEDIATELY AFTER UPDATING NOW I CAN ONLY CALL ONE PARTY AND ADD ONE MORE ON TO THE CALL. SO BASIC THREE WAY CALL.
ALSO I HAVE NOTICE AFTER UPGRADING THAT IF I WAS ON A CALL AND ANOTHER CALL CAME IN I COULD BRIDGE THE TWO CALLS TOGETHER. THAT IS NO LONGER POSSIBLE IN OS 7.
MY CARRIER IS VERIZON AND I SPOKE TO THEM IN REGARDS AND THEY NOTE I AM NOT RESTRICTED ANYWAY SINCE I AM A COMPLETE UNLIMITED USER.
THE OTHER ISSUE I HAVE NOTICE RIGHT AFTER THE UPGRADE THAT YOU CAN NO LONGER RESPOND TO A INCOMING CALL IF YOUR ON A CALL WITH "RESPOND WITH TEXT" THIS ONLY WORKS NOW IF YOUR NOT ON THE PHONE WHICH YOU CAN RESPOND WITH TEXT.
I WAS HOPING BY NOW APPLE WOULD HAVE A PATCH FOR THESE ISSUES, I CAN NOT BE THE ONLY PERSON HAVING THEM WITH OS 7.

Please stop YELLING!
MMS messages and iMessages require a data connection. Due to the nature of Verizon's network, you can not access cellular data while on a call.
As for conference calling, call Verizon back and escalate the call until you get someone who understands the word "provisioning". Have them re-provision your account.

External callers unable to join conference calls

Scenario: A conference call is set up using the scheduler. Lync users are able to join the conference calls. Users from outside PSTN are unable to join the call. They get to the attendant, and are told they are being joined to the
conference, then get a message "Sorry, I can't seem to connect you to your meeting right now. Goodbye." and the call disconnects.
Looking at call traces, I see the following error messages in the CAAServer log:
Component: CAAServer
Level: TL_ERROR
Flag: TF_DIAG
Function: CaaCall.EndTransfer
Source: caacall.cs(3631)
Local Time: 08/26/2014-18:28:36.161
Sequence# : 0001BE31
CorrelationId : 64624070
ThreadId : 0BA8
ProcessId : 0BB0
CpuId : 0
Original Log Entry :
TL_ERROR(TF_DIAG) [0]0BB0.0BA8::08/26/2014-22:28:36.161.0001be31 (CAAServer,CaaCall.EndTransfer:caacall.cs(3631))[64624070]ConferenceFailureException. ConferenceID=[91127] InstanceID=[b64b9467-db72-41bb-a2b5-673d76777ea4]
Component: CAAServer
Level: TL_ERROR
Flag: TF_DIAG
Function: CaaCall.HandleUnexpectedException
Source: caacallerrorhandling.cs(51)
Local Time: 08/26/2014-18:28:36.226
Sequence# : 0001D265
CorrelationId : 64624070
ThreadId : 0BA8
ProcessId : 0BB0
CpuId : 2
Original Log Entry :
TL_ERROR(TF_DIAG) [2]0BB0.0BA8::08/26/2014-22:28:36.226.0001d265 (CAAServer,CaaCall.HandleUnexpectedException:caacallerrorhandling.cs(51))[64624070][Enter] exception=[Microsoft.Rtc.Collaboration.ConferenceFailureException:The operation failed due to a response
from the server. For more information, examine the properties on the exception and inner exception.
   at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()
   at Microsoft.Rtc.Signaling.Helper.EndAsyncOperation[T](Object owner, IAsyncResult result)
   at Microsoft.Rtc.Collaboration.McuSession.EndSendCommandInternal(IAsyncResult result)
   at Microsoft.Rtc.Collaboration.AudioVideo.AudioVideoMcuSession.EndTransfer(IAsyncResult result)
   at Microsoft.LiveServer.Caa.CaaCall.EndTransfer(IAsyncResult asyncResult, Boolean& retry, Exception& caught)
Detected at System.Environment.get_StackTrace()
   at Microsoft.Rtc.Collaboration.ConferenceFailureException..ctor(String message, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.CreateConferenceFailureException(ConferenceCommandResponse commandResponse, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.ProcessCccpResponse(SipMessageData messageData, responsetype response, Boolean& isPendingResponse)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.ProcessStatusMessage(SipMessageData statusMessageData, responsetype response)
   at Microsoft.Rtc.Collaboration.Conferencing.StatusMessageReceivedWorkItem.Process()
   at Microsoft.Rtc.Signaling.AsyncWorkitemQueue.ProcessItems()
   at Microsoft.Rtc.Signaling.SerializationQueue`1.ResumeProcessing()
   at Microsoft.Rtc.Signaling.SerializationQueue`1.ResumeProcessingCallback(Object state)
   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)] m_conferenceID=[91127] m_conferenceUri=[sip:[email protected];gruu;opaque=app:conf:focus:id:4TPY99KF] InstanceID=[b64b9467-db72-41bb-a2b5-673d76777ea4]
Component: CAAServer
Level: TL_ERROR
Flag: TF_DIAG
Function: CaaCall.HandleUnexpectedException
Source: caacallerrorhandling.cs(51)
Local Time: 08/26/2014-18:28:36.226
Sequence# : 0001D265
CorrelationId : 64624070
ThreadId : 0BA8
ProcessId : 0BB0
CpuId : 2
Original Log Entry :
TL_ERROR(TF_DIAG) [2]0BB0.0BA8::08/26/2014-22:28:36.226.0001d265 (CAAServer,CaaCall.HandleUnexpectedException:caacallerrorhandling.cs(51))[64624070][Enter] exception=[Microsoft.Rtc.Collaboration.ConferenceFailureException:The operation failed due to a response
from the server. For more information, examine the properties on the exception and inner exception.
   at Microsoft.Rtc.Signaling.SipAsyncResult`1.ThrowIfFailed()
   at Microsoft.Rtc.Signaling.Helper.EndAsyncOperation[T](Object owner, IAsyncResult result)
   at Microsoft.Rtc.Collaboration.McuSession.EndSendCommandInternal(IAsyncResult result)
   at Microsoft.Rtc.Collaboration.AudioVideo.AudioVideoMcuSession.EndTransfer(IAsyncResult result)
   at Microsoft.LiveServer.Caa.CaaCall.EndTransfer(IAsyncResult asyncResult, Boolean& retry, Exception& caught)
Detected at System.Environment.get_StackTrace()
   at Microsoft.Rtc.Collaboration.ConferenceFailureException..ctor(String message, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.CreateConferenceFailureException(ConferenceCommandResponse commandResponse, Exception innerException)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.ProcessCccpResponse(SipMessageData messageData, responsetype response, Boolean& isPendingResponse)
   at Microsoft.Rtc.Collaboration.Conferencing.SendCommandAsyncResult.ProcessStatusMessage(SipMessageData statusMessageData, responsetype response)
   at Microsoft.Rtc.Collaboration.Conferencing.StatusMessageReceivedWorkItem.Process()
   at Microsoft.Rtc.Signaling.AsyncWorkitemQueue.ProcessItems()
   at Microsoft.Rtc.Signaling.SerializationQueue`1.ResumeProcessing()
   at Microsoft.Rtc.Signaling.SerializationQueue`1.ResumeProcessingCallback(Object state)
   at Microsoft.Rtc.Signaling.QueueWorkItemState.ExecuteWrappedMethod(WaitCallback method, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)] m_conferenceID=[91127] m_conferenceUri=[sip:[email protected];gruu;opaque=app:conf:focus:id:4TPY99KF] InstanceID=[b64b9467-db72-41bb-a2b5-673d76777ea4]
Component: CAAServer
Level: TL_ERROR
Flag: TF_DIAG
Function: CaaCall.TransferCompletedQueued
Source: caacall.cs(3739)
Local Time: 08/26/2014-18:28:36.231
Sequence# : 0001D269
CorrelationId : 64624070
ThreadId : 0BA8
ProcessId : 0BB0
CpuId : 2
Original Log Entry :
TL_ERROR(TF_DIAG) [2]0BB0.0BA8::08/26/2014-22:28:36.231.0001d269 (CAAServer,CaaCall.TransferCompletedQueued:caacall.cs(3739))[64624070]Call Transfer Failed. InstanceID=[b64b9467-db72-41bb-a2b5-673d76777ea4]
The unexpected error entry includes this information in the diagnosticUtils section:
Component: CAAServer
Level: TL_INFO
Flag: TF_DIAG
Function: DiagnosticUtils.TryCreateSignalingHeader
Source: diagnosticutils.cs(269)
Local Time: 08/26/2014-18:28:36.231
Sequence# : 0001D268
CorrelationId :
ThreadId : 0BA8
ProcessId : 0BB0
CpuId : 2
Original Log Entry :
TL_INFO(TF_DIAG) [2]0BB0.0BA8::08/26/2014-22:28:36.231.0001d268 (CAAServer,DiagnosticUtils.TryCreateSignalingHeader:diagnosticutils.cs(269))Creating SignalingHeader for InstanceID=[b64b9467-db72-41bb-a2b5-673d76777ea4], header-name=[ms-diagnostics], header-value=[10010;Reason="Gateway
side Media negotiation failed";Source="LYNC-FE.itprocare.com";component="MediationServer";sipresponsetext="Invite with Replaces failed because Gateway side reinvite failed.";DialogID="f94f35b9-7f5d-4bcd-94a8-de0fb2d8c4c6;df1bec7e24;24010080"]
Which matches up with an error in the SIP trace:
TL_INFO(TF_PROTOCOL) [0]0DEC.0A48::08/26/2014-22:28:36.151.0001ac66 (SIPStack,SIPAdminLog::TraceProtocolRecord:SIPAdminLog.cpp(125))$$begin_record
Trace-Correlation-Id: 3329945913
Instance-Id: 00000688
Direction: outgoing
Peer: lync-fe.itprocare.com:51307
Message-Type: response
Start-Line: SIP/2.0 491 Invite with Replaces failed because Gateway side reinvite failed.
From: <sip:[email protected];gruu;opaque=app:conf:audio-video:id:4TPY99KF>;tag=26f350618b;epid=6DF0663499
To: <sip:[email protected];gruu;opaque=srvr:MediationServer:BMFt1DuKo1KYsGtnqeobCwAA;grid=9d179e4c3aeb4fd7aedd36d7853ad98b>;epid=26F55811B8;tag=2e6beef249
CSeq: 5 INVITE
Call-ID: af099053-d8aa-4ca4-9820-936e8522611c
Via: SIP/2.0/TLS 10.160.1.47:51307;branch=z9hG4bKeb2e7ed6;ms-received-port=51307;ms-received-cid=9B00
CONTENT-LENGTH: 0
P-ASSERTED-IDENTITY: <sip:5853307343;[email protected];user=phone>
SERVER: RTCC/4.0.0.0 MediationServer
ms-diagnostics: 10010;source="LYNC-FE.itprocare.com";reason="Gateway side Media negotiation failed";component="MediationServer";SipResponseText="Invite with Replaces failed because Gateway side reinvite failed."
ms-diagnostics-public: 10010;reason="Gateway side Media negotiation failed";component="MediationServer";SipResponseText="Invite with Replaces failed because Gateway side reinvite failed."
ms-endpoint-location-data: NetworkScope;ms-media-location-type=intranet
Message-Body: –
$$end_record
The trunks are configured with REFER off and MediaBypass Off.
We have recently moved to a direct SIP trunk from a vendor on Microsoft's Certified list.
Lync version is 2010, with the latest CUs applied. All other calling appears to be working correctly. The certificate on the servers are using the SHA1 algorithm (I have seen some similar issues discussed if this was not the case.)
At this point, I have reached the end of my immediate troubleshooting skills with this system. Can anyone offer any suggestions as to what might be going on here?
Thanks for any help.
-Tim

Hi,
Please check if the default gateway associated to the Mediation Server is up or not.
Please check if Media traffic on the Gateway be blocked with the issue of wrong encryption. Make sure it is using SRTP (not RTP). If you use RTP, please change it and then test again.
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

A few conference call questions

If I make a conference call, it will take double the minutes right? I am essentially making two calls. If I make this conference call at night (I have the lowest plan with 450any/5000n&w), it will take double the minutes from the 5000, right?
Thanks.

draenic wrote:
I have to be absolutely sure on this
Just so you know. If you need to be absolutely sure, why ask a forum of iPhone users that are mainly here to help with issues with the iPhone. At the Apple site to boot. Your contract is with AT&T. They have all the info about billing etc. Apple just made the device, after that, it is all AT&T.
Yes others can tell you what they think, what they noticed, etc. But just call AT&T and ask if you have to be *absolutely sure*. Just my advice.

Do I get full conference call management options on iPhone 6 model A1549 if using it with GSM carriers?

I have iPhone 6 model A1549, bought from and currently using with Verizon. You all must be aware that we can use the same phone for GSM carriers like at&t as well. Now we all know that some of the features related to conference calling are not available on CDMA carriers, like we cant have more than 2 callers, and we can't manage conference calls by making the conversation with one party private for some time and again switching back to conference mode, disconnecting a particular party instead of having to end the entire call etc. reference link- iPhone: Understanding phone features - Apple Support These features are available on GSM models and carriers, I just wanted to ask if I use a GSM SIM from a GSM carrier on this model, do I get these additional conference call management options or I am restricted to Verizon like experience while being on at&t (and while using the at&t SIM in this model)

Yes, I am dealing with this right now on at&t with a 6 plus. I've been down the same road as you. I got it to work with a windows phone yesterday but not my 6 plus when I switched back to the iPhone. My wifes 6 works fine. I believe it is an at&t issue and not an 8.3 issue. After dealing through several levels of support at at&t, they are telling me it has to do with their transition to hd voice. Some people are having this issue because they are updating their system and some peoples phone profile, on phones that have hd voice capabilities, are not getting added to their line and call forwarding will not work without it. I have a trouble ticket open to their engineering dept and they promise it will work for me on or before the 24th of april. Engineering has to build my phones profile so call forwarding will work with my iPhone.
This is frustrating because like you, I need to forward my calls because I have no signal in my office and need to forward to another phone so I can get my calls. If at&t would quit dragging their feet and enable wifi calling, this wouldn't be an issue for me. I would suggest you put more pressure on at&t and escalate this until it gets resolved. Or put your sim in a phone that does not have hd voice capability and see if it works then.
Good luck. I'm keeping my fingers crossed this will be fixed for me on or before the 24th. We'll see.
EDIT: I see you did put it in another phone and it worked. That backs up that the issue is at&t and their hd voice upgrades. They had no explanation as to why some work and some don't, but have them make sure a profile for your phone is on the line. If not, they'll need to build one for the phone so that it''l work. At least that's the story for now. Like I said, I'll know more in a day or two.

Internal calls audio issue

Hi,
I have uc320w with 2.3.2 (6) firmware and 2x SPA504g, 1x 508g, 1xspa303, 1 annalog phone @ fxs port. Both 504g are conected via wifi module. All phones are asign and work well in PBX system and ansfering all external calls even tranfers works well. Only internal dialing and internal conference calls doesn't work, phones ring, but audio not, or just hear myself. Whe is an issue?

Yes they have cisco wireless-N bridge for phone adapters. Right no way audio between any phones, even ones they have no more the 10ft of cat5e utp. there is no swich at all, they are are conected directly to the uc320w and have own power adapters. For external calls is used SIP trunk only. WAN connection is direct to provider passing cisco DPC3825 cable modem in bridge mode (SHAW canada) with static IP address. Uc320w is used to route only voice and has WAN connection 50Mbit down and 5Mbit up, 711u is used for SIP trunks. Ping to SIP provider server is around 12ms. SIP is one line(one number) with 4 DIDs
Regards
Eric

Conference calls technical issues

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