Sip – 5060 UDP
Rtp – ваш диапазон
SPA3102 – IP хоста sip
Правила
1)
Action: Nat
Service: sip
Source Interface:Lan Network: lannet
Destination Interface:Wan Network: all-nets
2)
Action: Allow
Service: sip
Source Interface:Wan Network: all-nets
Destination Interface:Core Network: Wan_IP
3)
Action: Nat
Service: rtp
Source Interface:Lan Network: lannet
Destination Interface:Wan Network: all-nets
4)
Action: Allow
Service: rtp
Source Interface:Wan Network: all-nets
Destination Interface:Core Network: Wan_IP
5)
Action: SAT
Service: sip
Source Interface:any Network: all-nets
Destination Interface:Core Network: ISP_IP
SAT New IP Address: SPA3102 port: 5060 All-to-One Mapping: rewrite all destination IPs to a single IP: отключен
6)
Action: Allow
Service: sip
Source Interface:any Network: all-nets
Destination Interface:Core Network: ISP_IP
7)
Action: Allow
Service: sip
Source Interface: Wan Network: SPA3102
Destination Interface: Any Network: all-nets

Action: SAT
Service: rtp
Source Interface:any Network: all-nets
Destination Interface:Core Network: ISP_IP
SAT New IP Address: SPA3102 New port: (пусто) All-to-One Mapping: rewrite all destination IPs to a single IP: включен
9)
Action: Allow
Service: rtp
Source Interface:any Network: all-nets
Destination Interface:Core Network: ISP_IP
10)
Action: Allow
Service: rtp
Source Interface: Wan Network: SPA3102
Destination Interface: Any Network: all-nets
Может чего лишнего навоял, но так точно работает, а экспериментировать пока нет времени.