E1 connection

Hello
We are changing ISP
New ISP did provide RJ45 to our office
After 2 days someon called me and said that is not Ethernet connection - it
is E1 (G.703) Connection

I hav router 3640 wirf FE -PRI interface (1FE-2CE1-B/U) 2 CTRLR and
FastEthernet interfaces

wan network settings (xxx.xxx.xxx.aaa - xxx.xxx.xxx=fake aaa=real)
Both WAN and LAN are PUBLIC
ISP provided some informations

WAN settings
Wan network: 80.80.80.156
WAN interface: 80.80.80.158
WAN remote: 80.80.80.157
WAN subnet mask 255.255.255.252

Lan Settings
LAN network: 80.80.73.16
Lan Gateway: 80.80.73.17
1st usable IP: 80.80.73.18
Last usable IP: 80.80.73.31
network mask: 255.255.255.240

Question is
Is this Interface is Correct? can I use FE-PRI
How to configure this interface if Yes?

Thank You
Robert


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