Hello,

Task: we have Softswitch (SS) on Private network: 192...../255.255.255.0 bihinde it Cisco 2811 (SBC). The IP-Phone is placed on other private network ......./255.255.255.0. Config of Cisco 2811 see below. IP phone register without problem but with private address ......... at SS.

Nat does not change address in sip pakets sended to SS. I am not understand where problem is.