Well, when calling from extension 1000 to 70904, what I see on the console (debug mode) is:
2009-03-16 13:35:39 [DEBUG] switch_core_state_machine.c:152 switch_core_standard_on_execute()
sofia/internal/1000@pbx-sip-3.usa.internal.net Execute bridge(sofia/gateway/${default_gateway}/70904)
2009-03-16 13:35:39 [DEBUG] switch_core_session.c:1286 switch_core_session_exec()
sofia/internal/1000@pbx-sip-3.usa.internal.net Expanded String bridge(sofia/gateway/
pbx-sip-4.usa.internal.net/70904)
2009-03-16 13:35:39 [ERR] mod_sofia.c:2379 sofia_outgoing_channel() Invalid Gateway
2009-03-16 13:35:39 [NOTICE] mod_sofia.c:2591 sofia_outgoing_channel() Close Channel N/A [CS_NEW]
2009-03-16 13:35:39 [ERR] switch_ivr_originate.c:1425 switch_ivr_originate() Cannot create outgoing channel of type [sofia] cause: [INVALID_NUMBER_FORMAT]
2009-03-16 13:35:39 [DEBUG] switch_ivr_originate.c:2014 switch_ivr_originate() Originate Resulted in Error Cause: 28 [INVALID_NUMBER_FORMAT]
2009-03-16 13:35:39 [INFO] mod_dptools.c:1998 audio_bridge_function() Originate Failed. Cause: INVALID_NUMBER_FORMAT
What else am I missing and not doing right? Thanks again for your help.