Trial time meaning in license_status

[JohnDoe24]

What are the implications of the trial period expired. What is working and what can't be done?

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pu_add -unit TL11

TL11 doesn't exist in system
I want to use a TLU83 analog line. Not being able to program unit TL11, does it have any relation to expired trial?

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                               Port licenses:
                               ==============

                                          Tag     Trial time      Allowed         Used
=============================================   ============   ==========   ==========
                      3RD-PARTY-SIP-EXTENSION            480            0         4
                                    ACD-AGENT            480            0         0
                        ADDITIONAL-SIP-DEVICE            480            0         0
                            ALERT-RING-SIGNAL            480            0         0