I am new to freeswitch. Just installed freeswitch-1.0.1 with default configurations on CentOS 4.6 with OpenVZ. I registered two Cisco7960 phones using static IP with default users(1001.xml, 1007.xml). The registration are OK, but when I try to call from each other, it immedially send to voicemail. The following is the log info from console: (I replaced the real IP with 10.1.1.117 in the log)

2008-10-10 11:41:02 [NOTICE] switch_channel.c:534 switch_channel_set_name() New Channel sofia/internal/1001@10.1.1.117:51029;transport=udp;fs_nat=yes [bfe75310-638d-48df-8f3d-262143c15b22]
2008-10-10 11:41:02 [NOTICE] sofia.c:2545 sofia_handle_sip_i_state() Hangup sofia/internal/1001@10.1.1.117:51029;transport=udp;fs_nat=yes [CS_CONSUME_MEDIA] [NORMAL_TEMPORARY_FAILURE]
2008-10-10 11:41:02 [ERR] switch_ivr_originate.c:926 switch_ivr_originate() Cannot create outgoing channel of type [user] cause: [NORMAL_TEMPORARY_FAILURE]
2008-10-10 11:41:02 [INFO] mod_dptools.c:1789 audio_bridge_function() Originate Failed. Cause: NORMAL_TEMPORARY_FAILURE
2008-10-10 11:41:02 [NOTICE] switch_core_session.c:807 switch_core_session_thread() Session 6 (sofia/internal/1001@10.1.1.117:51029;transport=udp;fs_nat=yes) Ended
2008-10-10 11:41:02 [NOTICE] switch_core_session.c:809 switch_core_session_thread() Close Channel sofia/internal/1001@10.1.1.117:51029;transport=udp;fs_nat=yes [CS_HANGUP]