Reached the maximum of SX20 codec calls once an audio call is connected?

Hi all

I have different SX20 devices deployed on our corporate network that are currently on the same version of software: TC 7.2.1.

For some strange reason that a device does not have a second call (audio) to be placed and added after it has established the first video call?

Everyone knows this?

In the State of the system it says the MaxNumberOfActiveCalls = 1 where, as my other systems SX20 say MaxNumberOfActiveCalls = 2?

I have attached a picture of the number experienced in the tab "call control".

Thank you


The SX20 has the Multisite Option? Check under the Home tab.

If no Multisite option installed, adding another call for multipoint call will make the second audio call to become involved only and this is a normal behavior. You mentioned that you cannot add another call (audio), is the system put into service and recorded the CUCM?

Check also under Configuration > System Configuration > conferences what Multipoint mode:

Kind regards


Tags: Cisco Support

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