setup vpn using 3com officeconnect cable/dsl secure gateway 3cr856-95

  I want to establish a vpn within two networks by using two 3cr856-95 .
network 1 using fixed ip broadband,
network 2 using dynamic ip broadband.
how can i setup the vpn in the router?
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do you have static IP? if yes, you may setup gateway to gateway VPN. if not, you may create DDNS. for more information. go to

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fatchoiAuthor Commented:
yes.I want to create gateway to gateway.
but i don't not how to setup.
fatchoiAuthor Commented:
i know how to configure it.
the main point is the connection name must be the same as destination gateway Id.
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