This is a rough outline of getting a D220 connected to run credit card transactions. It's a wireless terminal and a bit of a pain to get working, so it's best to call PAX and have them walk through the process of getting it connected, noting the IP and doing a test. Below is all the stuff its usually a good idea to set on BroadPOS after getting it initially connected.
1. Call pax to get them initially connected by manually entering wifi info and get ip address/gw/subnet/dns
2. Enter the info above into broadpos. ssid/password/ip info
3. Ask pax to help them with a manual app update
4. In broadpos turn off WIFI update
5. In broadpos disable DHCP under communication
6. In broadpos disable P2PE under TSYS (depends on merchant)
7. In broadpos disable PowerSaving Under MISC.
8. In broadpos change Communication Type to Ethernet under Communication.
9. Have them do another manual app update.