I am having little weird problem that when I am using the pstn line direct means connect to direct telephone the voice is clear in calling and receiving call.
But when I am connecting it to uc520 it give some noise like ‘chha ,chha ‘ in between the voice
Which make it hard to understand the auto attendant message and also when I place a call this noise there like chha ,chha in between the voice there is any way to remove this noise
Is this using the in-built FXO ports or is this an add-on VIC card?
I have had this problem before and after replacing 2 systems the problem didn't go away until the third one, still to-date I have no clue what caused it and neither did TAC, it was one of those green gremlin problems.
Does the noise happen on incoming only or can it occur on outgoing as well?
thank you David.for ur support
the problem with bulit in card and it happens both incoming and outgoing
i do not know why cisco does not slove this ,i am having other customers and really i am afraid to sell uc560 again unless this problem slove from cisco
3 things that I know of you could try. I would try changing the impedance first:
impedance values to try are 600r and 900r that I've used successfully. 600 ohms is the default. You can check the current impedance value with the "show voice port" command
You can also try changing the ouput attenuation and input gain if the problem is volume related:
output attenuation (value)
input gain (value)
Is the noise like the following examples?
Also what are the full set of symptoms?
You can make the suggested changes as the post above, however I would caution you on doing so without having someone from support on the other end of the phone, these changes require CLI modification in most cases (Unless recently introduced into CCA) and these changes can incur other issues such as heavy feed back, echo and other unwanted attributes. Having a Cisco tech on the other end of the line helping you out with diagnosing this problem is the best advise I can give you on this, unless you are very good with CLI work and can either revert the changes quickly and know how to read any of the debug messages, it is very very very important you understand what the changes may do to the service or the system, making changes blindly will often cause you more grief than what you are experiencing now.
If you havent logged a SMB support request (OR TAC if this is a CLI only system) then i would encourage you to do so, especially if this is a
production system, the longer you take to do it the longer the client will have to deal with the problem.
the issue i am having as u said White Static noise, similar to that of your TV going to a channel that does not exist
this perfect description i think it would have taken me while to write this ,Thanks,
CCA 3 have possibility to modify the value without need for CLI, i am trying but with the value still no use
regarding open ticket ,this can not be done because the box is uc520 and it is no supported by small business division of cisco so either we have to get support from distributor (which will not help)
or purchase smart net
really sad storyyyyy , any help will be appreciated
If you private message me details to log onto the system remotely I would be happy to look at it and see if I can assist you with the problem.
I would need either of the following:
If the problem is the same as the ones I have experienced in the past, then it is highly unlikely I am going to be able to resolve it, but still I am more than happy to investigate it for you
Let me know what you want to do.
I have change all values
output attenuation (value)
input gain (value)
and i checked all combinations without any use the tension is when customer plug his 1$ telephone and connect to pstn line and make call the voice
is very clear ,i am fed up cisco , could you tell me how u solved your problem what you did exactly please ,customer frustrated and i am done with cisco
this lines from Saudi telecom company STC.
There are a few things to look at here and also possibly do.
None of these suggestions are going to eliminate your concerns or the problem unless they are acted upon, but if you have already diagnosed this end-to-end and have pulled out enough hair, at which point do you decide to step away from it and take the path that will cost you money up front? But maintain your sanity and the clients if this is a production system?? You have to consider alternatives if you want to get past this problem, fixing yourself into a corner will not solve it I promise you this.
Speak to your local Distributor and ask them if they can also provide you with technical assistance, if the UC-520 is new then it is also under warranty and if a fault is present then this needs to get resolved.
I hope you find a solution to your problem, and I am sorry you are in this position it is not a nice thing to go through and I know how you feel.