AYAYA and CUCM-BE connection

Hi Experts,
I need your help to understand how to connect / interface CUCM-Business Edition with AYAYA-S800 EPBX where PSTN link is terminated.
I understand that CUCM-Business edition appliance have Ethernet Interface (RJ45) and AYAYA-S800 EPBX is also have IP card.
Shall I directly connect CUCM with EPBX using a UTP cable. The idea is, I have 100 analog Phones and CUCM will be having 25 IP phones. These should talk to each other and make outgoing calls using PSTN connected in AYAYA EPBX
Thanks in advance,
sairam

Hi bevilacqua,
First I have to thank your for sharing your expertised idea.
It is true that for 25 IP Phones CCME is enough though. But this number will increase to 400 in near future.
That is the reason we opted CUCM-BE for future proof. I am not sure how to connect AYAYAS800 (where PSTN link is terminated and some analog phones are connected) with CUCM-BE appliance. I am sure AYAYA is having IP card installed ready for usage.
Please help me by shedding lights on this
Thanks in advance
sairam

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