BGP Connection Setup

[halter_joel]

I have never used BGP and i have been tasked to try to setup a Peering Trunk between My office and a SIP Provider. This will be a dedicated Trunk over Fiber.

MyPfsense --> Meeting Point --> Sip Trunk Provider

My Pfsense- I have a Netgate 2100. I have used the SFP port for the Dedicated Trunk, I have used another port on the 4port Switch to be a WAN uplink.
I also have two other Lan interfaces. Lan 1.2.3.1/24 has all my Sip Phones which need to be passed over the BGP connection to the Sip providers Session Border Controller using their Internal Network

BGP Settigns- We have a Public Network 9.8.7.6/30 for our Interface IP's, My internal network 1.2.3.1/24, Trunk Provider internal 10.9.8.1/24.
The IP of their SBC is 10.9.8.7

My Goal is to take all the SIP traffic from 1.2.3.1/24 and send it to 10.9.8.7 over the SFP Connection (9.8.7.6)

Questions- Will this work? Do i use Nat rules, Firewall Rules? Nat Reflection?