Question : Problem: Nat port range Cisco 871

have a cisco 871 with a single static from ISP that needs some ranges opened for VOIP i read a little on reflexive acl, and i know i could do with and ACL if i had multiple IP's from the ISP but i don't.. i am attaching my config...any ideas?

Answer : Problem: Nat port range Cisco 871

please talk with your ISP. configuration is ok. most probably they are using proxy arp. some time later it may work