Teamspeak, by default, only allows one client with the same identity certificate on the server at a time.
This is extremely annoying due to the fact that if you have one client connected elsewhere, you will not be allowed to connect.
If you have teamspeak on multiple devices, and forget to disconnect on any of them, you will not be able to connect until the zombie client is kicked, and there is nothing you can do about it.
The i_client_max_clones_uid
permission holds the value of how many connections by the same identity certificate is allowed. By default, this set to 1. Setting it higher may be better for people with multiple devices.
I personally use teamspeak regularly on 3 devices (gaming pc, laptop, phone) and it would make my life easier if this setting is changed.