What are these IPs given for sip trunk from sip company?

recently we`ve recieved the IPs and infos of our sip trunk, that some of them I know and some I dont .
what are these IPs and numbers?
subscriber abb : some words
applicant Ex: some words
softx IP : an ip
softx abb : some agent ID
lopback IP : an ip
IOB : a word
and there is sbc name, where do i need it for?
thanks alot

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