Connect Nohia 6120 to "Asterisk"

Did yuo know how to set call between two Asterisk extension if first extension,101, into LAN and second,102, on the WAN (NOKIA 6120 -not has WiFi).Frome the "Asterisk I get massage:

Saved useragent “Sipura/SPA942-4.1.10(e)” for peer 101
– Registered SIP ‘102’ at port 44439
– Executing [102@internal:1] Dial(“SIP/101-0000000a”, “SIP/102”) in new stack
– Called 102
[Mar 17 23:25:34] NOTICE[13943]: chan_sip.c:3114 auto_congest: Auto-congesting SIP/102-0000000b
– SIP/102-0000000b is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
== Auto fallthrough, channel ‘SIP/101-0000000a’ status is ‘CONGESTION’


Thank you all.