Call Manager vs. SIP Proxy and Registration Server?

Hello:

What is the difference between Cisco's Call Manager and a SIP Server?

Can I use Cisco IP phones with a SIP Server (and no CM)?

Can I use one of the softphones available out there with the Cisco CM?

Does Cisco have a softphone?

TIA,

-Ramon F Herrera

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Posted 5 years ago by Ramon F Herrera in Cisco Systems

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