asterisk users - Nov 2005 - sip to sip, not comunication

I have problem, install asterisk the cvs
cvs checkout -r v1-2-0 zaptel libpri asterisk asterisk-addons asterisk-sounds

compile normal, install normal, user with modem motorola.

the cal sip to motorola work fine, but sip to sip no ring

log the call

-- Unregistered SIP '1234'
    -- Registered SIP '1234' at 201.230.97.110 port 9906 expires 3600
    -- Added extension '1234' priority 1 to sipregistrations
    -- Saved useragent "xlite release 3010n stamp 19039" for peer 1234
    -- Executing Dial("SIP/1234-cfb0",
"SIP/123@domain.com.pe|20|tr")
in new stack
    -- Called 123@sorcier.com.pe
    -- Unregistered SIP '12345'
    -- Nobody picked up in 20000 ms
  == Auto fallthrough, channel 'SIP/1234-cfb0' status is
'NOANSWER'