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I'm looking for someone who is expert in Cisco Configuration.
Currently I've Cisco UC520 that needs to be configure with Nexvortex's SIP. ( see attached guide)
Nexvortex is already deployed and ready to use.
For the termination end I'm using Cisco UC520
You need to use HTTP DDNS ( SP= zeoneedit.com / dyns.cs / members.easydns.com / members.dyndns.org ) to provide a pure static IP / Dns
Once the SIP trunk is done. You need to register a Cisco CP9971 phone that is already connected with the UC520.