S8800 Simplex: 1 IP address
G650: (specific to cards installed)
IPSIs (1 each) (possibly on a private control network)
CLANs (If any) 1 each
MEDPROs 1 IP each, or if 2 TN2602APs in a high reliability setup, then 3 IPs
VALs (if any) 1 IP each
AES: 1 IP address
IP sets, IP conference phone, IP console 1 DHCP IP each
It would be best if the customer has a "Layer 3" switch, to request your own Class C IP subnet, routed to the rest of the clients network, since you will need 162 IPs just for the phones, plus another 4-8 for the phone equipment. This is how I would do it. Also make sure you get the "Default Gateway" and subnet mask info from them as well, you will need it so when you setup the IP interfaces, the traffic can be routed to the rest of the clients network.
It would also be best if you can get "external internet" access on your VLAN, so you can get to an external NTP (Time server) such as "time.nist.gov" (192.43.244.18), or if the client has one, find out what their internal NTP server is, you don't want the time drifting on the S8800 server.
Mitch
AVAYA Certified Expert