紧急!cisco路由器+voip网关的配置...

公司通过cisco 2600访问外网,现在公司安装了一个voip网关,ip地址为10.10.2.20,路由器配置如下 interface FastEthernet0/0 ip address 10.10.2.3 255.255.254.0 ip nat inside duplex auto --More--   speed auto ! interface FastEthernet0/1 ip address 220.248.76.1 255.255.255.0 ip nat outside duplex auto speed auto --More--  ! ip nat pool voip 10.10.2.25 10.10.2.25 prefix-length 32 ip nat inside source list 101 interface FastEthernet0/1 overload ip nat inside source static tcp 10.10.2.1 25 220.248.76.1 25 extendable ip nat inside source static tcp 10.10.2.1 110 220.248.76.1 110 extendable ip classless ip route 0.0.0.0 0.0.0.0 220.248.76.2 ip http server ip pim bidir-enable ! ! access-list 101 permit ip 10.10.2.0 0.0.1.255 any access-list 110 permit udp host 10.10.2.20 range 30000 30100 any access-list 110 permit tcp host 10.10.2.20 range 1024 5000 any access-list 111 permit udp host 220.248.36.71 any access-list 111 permit tcp host 220.248.36.71 any dialer-list 1 protocol ip permit 本人初次接触cisco路由器,现在公司要将2600路由器换成pix防火墙，请问,关于voip网关这一部分应该如何配置，烦请高手给我配置一下吗？ 我问了一下voip网关公司的人，说要将voip网关,即ip地址10.10.2.20 tcp从1024-5000,udp从30000到30100打开。

没人帮我呀

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