ip phone---CME----pri ?---fxo?----PSTN
The issue is for an incoming (external) call on an ip phone and the user tries to do a blind transfer to an internal extension...the ip phone keeps hearing ringing. ??
1.Send me the configs of CME - sh run / sh ver / sh telephony-service
2. Does this happen on all calls ??
Let me know the above
Yes Mili, the issue is for incoming external call (not internal call) and when the user do a blind transfer. It only happens on one extension. I have tried another phone on the same extension and it does the same thing. I have tried deleting and creating the ephone-dn again but that does not help. I have tried the same phone on another extension and we did not have the same issue.
To start from the begining, we actually got a call from a customer saying that when she does a blind transfer, the phone keeps on ringing in her ear. We brought that phone in our office and tried it on one of our sales peoples extension and it started doing it. We then thought that might be the issue with the phone, so we changed the sales person phone back to the original one but now the sales person is having the same problem on his phone as well now.
Both, client and our topology is the same.
ip phone---CME---SIP Provider----PSTN
I am attaching the show run commands you requested as well. The problem we are having is with the ephone 2.
Thanks for your help.
Apologies for the delay in the response....somehow this thread got burried in my emails.
Is the issue still occuring ??
You mention that you have changed phone types and the issue remains on ephone 2 - ephone-dn 11 ?
ephone-dn 11 dual-line
number 102 secondary 442081501119
description Rob Coleman
name Rob Coleman
call-forward busy 300
call-forward noan 300 timeout 18
hold-alert 30 originator
username "rob" password cisco
button 1:11 2o8,9
- have you tried doing consult transfer and does that work ? I see that the telephony-service the system is configured for "transfer-system full-consult "
- Can you please send me " sh ephone phone-load " to see whats the phone load on the ephone 2
- enable the below debugs and send to me for the issue
debug voip ccapi inout
debug ephone det mac-add x.x.x
The problem has not been resolved yet and the situation is similar to yours. The customer will throw the solution away if it is not resolved. This is not the only issue we had, we had a lot of issues and we had to find a lot of work arounds for it. I also opened a case and tried to resolved the issue but without any success. We are planning to move our customers away from cisco solution.
Sorry could not get back to you earlier as I was busy on some other stuff. Do we have to apply the command under ephone-dn? At the moment the ephone-dn looks like as follows:
ephone-dn 3 dual-line
number 103 secondary 442089772148
description Imran Khan
name Imran Khan
call-forward busy 300
call-forward noan 300 timeout 18
Will wait for your response.
I have this exact same problem as well, this has only happened since I upgraded the system to 15.1, if I downgrade the system to 22(YB) the issue goes away.
I am fairly confident that this is a bug in the latest IOS
I have a very very very angry client on my hands now, and downgrading is not an option right now, the receptionist will not stop calling asking if the problem is fixed I am seriously ready to explode over this single issue.
However just to make sure I will outline the problem I am having to compare with everyone else's:
- Call comes in on the PRI
- Receptionist takes the call
- Caller wants to speak to person XYZ
- Receptionist Presses the "TransFr" Key, hear an incoming call and presses the "TransFr" key again to turn it into a Blind Tranfers instead of a consultative one
- Receptionist picks up the second incoming cal
- During the call the Receptionist and the caller can still hear the ringing of the transferred call
- If the internal extension picks the call up it stops ringing
To me it sounds like a conference bridge is taking place, although maybe not quite like that, but it ends up becoming like a 3 way conference call, with the exception of the internal extension not picking up the call, but whilst it is in the ringing state, cause as soon as the internal extension picks up the call or VM does, the bridge is closed of.
I have hit a brick wall on this, I am dreading opening up a TAC case on this one as testing is very limited due to how busy this company is, being a multi national the rate of incoming calls is very high.
NOTE: This is happening on a 2800 ISR, but it is also happening on a UC520 as well, although with the UC520 i just changed it to blind transfer only and the problem went away, the client was ok with that option, it is once you wanted full consult and Blind options at the same time the issue raises its ugly head.
If anyone has a solution for this it would be great, I would prefer not going down the work around path as I am limited with options of what I can do so a fix is really what I am after.
So you upgraded to 15.0(1)XA or 15.0(1)M ? CME 7.1 or CME 8.0 ?
One of the customers got the issue resolved by upgrading the firmware on the phone
is it compatible with the CME version ?
I have the same issues on a UC560 and UC520 except:
During the call the Receptionist and the caller can still hear the ringing of the transferred call
- in my case only the receptionist here's the ringing
If the internal extension picks the call up it stops ringing
- the ringing continues regardless even if I transfer the call AND with the first call on hold, and also when I pick up the first call. Receptionist hears the ringing the whole time
Client e-mails me every single day to vent. Been working with Cisco support, but nothing yet. Next step is to run some ephone debugging which I will do on Friday.
Network Infrastructure & Security Team (NIST)
Richard Fleischman & Assoc., RFA
Technology Consulting / Business Continuity Services
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