We are planning to deploy a UC540 system along with our current PABX.
PSTN --> PABX (with anlog phones) --> UC540 --> IP Phones
We have some questions that need your help to clarify before deciding to deploy it.
1. Are there any problems if I have 8 IP phones at the main site and 10 other IP phones at a remote site which has been connected to main site using VPN ( and of course in different subnet). I ask this question because it is stated in the datasheet that there are only 5 "Users per teleworker site" license with UC540.
2. As each IP phone need a unique "ext number" as any current analog phones. I plan to to connect from FXO port of UC540 to ext of current PABX. because the maximum FXO port on UC540 is 8, is there any solution to have 20 connection from "PABX ext" to " Cisco UC? Will a FXO SIP gateway solution work or not
Tks so much for any help !