Site to Site Question

Hi, All, I try to set up a site to site VPN connection to a bank office. The remote site ( the bank) uses Cicso VPN router and give me all their info that needed for setup. They told me that some of their partners use NetGear VPN router and sucessfully connected. So, I bought a NetGear VPN router, but am unable to make the connection. The bank said may be we need to buy a CISCO VPN router. Is this true the both end should use the same router. GL