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SX 20 with cucm to call outside

Hythim Ali El Hadad
Level 6
Level 6

‎05-14-2018 08:40 AM - edited ‎03-18-2019 02:06 PM

Hi,

 

we have two SX 20 registered to CUCM

how these sets call outside units also how other units call us through internet

 

Do we need expressway with rich media session license only ?

and how calls done

 

thanks

 

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