I'm pretty new to VoIP so please bare with me.. Reading about VoIP phones I've found that you have to buy some kind of license no matter which phone you are using : " All Cisco Unified IP phones require the purchase of a phone user license, regardless of call protocol being used. " Please can someone give me a link or enlighten me a little about them.
1. what are these licenses, why should I buy them, how much do they cost ?
2. Is this the only license I'll have to buy to use the ip phone ? Or I'll need some kind of software license too?