UC540 busy issue

[ashleyisa]

I have recently installed a UC540 at a customers site.

The fault is half the calls between extensions and from external carrier goto busy when the phone is not in use.

I have attached a copy of the ccapi trace which cause 17 being returned.

I'm currently running uc500-advipservicesk9-mz.151-2.T2.

[ashleyisa]

I just tried changing the IOS, but it still has the same issue.

when i monitor the line using sh ephone (MAC) it shows as IDLE, yet i am trying to call it and i get busy tone??

Is the actual UC540 faulty?

[Rob Huffman · Accepted solution]

Hi Ashley,

You should try posting this in the uc500 - SMB forum. There are

some great folks there who specialize in these setups

https://supportforums.cisco.com/community/netpro/small-business/voiceandconferencing/sbcs-uc500

Cheers!

Rob

[ashleyisa]

I didn't know there was a specialised forum, i'll go there:https://supportforums.cisco.com/thread/2084067

Thanks Rob