Swapping hold call with active call fails with error LINEERR_OPERATIONUNAVAIL

[user]

Hi,

In my application when swapping the active call with hold call gives the error LINEERR_OPERATIONUNAVAIL. What are the possible reasons to get this error? I  am using 7900 series Cisco IP phones and unable to find swap soft key in my IP phones?

Any help is appreciated.

[Geevarghese Cheria]

Hi

Swap Between Held and Active Calls on Multiple Lines

If your phone supports multiple lines, use line buttons to swap between held and active calls.

For example, if you have a held call on Line 1 and an active call on Line 2, press the Line 1 button to make the Line 1
call active (resume it from hold) and to automatically put the Line 2 call on hold.

This is the feature you can see on  section calling features that is supported by Cisco Unified IP Phone 6921, 6941, 6945, and 6961.

So can you try with 6921 phones instead of 79xx series phones.

Thanks and Regards,

Geevarghese